Registration No. 333-
                                                           ---------------------

                UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM S-3

             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                                Bioenvision, Inc.
             (Exact name of registrant as specified in its charter)

                 Delaware                                    13-4025857
                 --------                                    ----------
       (State or other jurisdiction                       (I.R.S. Employer
    of incorporation or organization)                   Identification No.)

                               509 Madison Avenue
                                    Suite 404
                            New York, New York 10022
                                 (212) 750-6700
              (Address, including zip code, and telephone number,
       including area code, of registrant's principal executive offices)

                               David P. Luci, Esq.
                   Chief Financial Officer and General Counsel
                                Bioenvision, Inc.
                               509 Madison Avenue
                                    Suite 404
                            New York, New York 10022
                                 (212) 750-6700
            (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

                                    Copy to:
                            Luke P. Iovine, III, Esq.
                      Paul, Hastings, Janofsky & Walker LLP
                               75 East 55th Street
                               New York, NY 10022
                                 (212) 318-6000

         Approximate  date of commencement of proposed sale to the public:  From
time to time after the effective date of this Registration Statement.

If the only securities  being registered on this Form are being offered pursuant
to dividend or interest reinvestment plans, please check the following box. |_|

If any of the  securities  being  registered on this Form are to be offered on a
delayed or continuous  basis  pursuant to Rule 415 under the  Securities  Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. |X|

If this Form is filed to register additional securities for an offering pursuant
to Rule 462(b) under the Securities Act, please check the following box and list
the  Securities  Act  registration  statement  number of the  earlier  effective
registration statement for the same offering. |_| __________

If this Form is a  post-effective  amendment filed pursuant to Rule 462(c) under
the  Securities  Act,  check  the  following  box and  list the  Securities  Act
registration  statement number of the earlier effective  registration  statement
for the same offering. |_| ___________

If this Form is a  post-effective  amendment filed pursuant to Rule 462(d) under
the  Securities  Act,  check  the  following  box and  list the  Securities  Act
registration number of the earlier registration statement for the same offering.
|_| ___________

If delivery  of the  prospectus  is  expected  to be made  pursuant to Rule 434,
please check the following box. |_|




                                            Calculation of Registration Fee
-------------------------------------------------------------------------------------------------------------------------------
  Title of each class of securities to             Proposed maximum
           be registered                          aggregate offering                             Amount of
                                                        price                               registration fee(1)
-------------------------------------------------------------------------------------------------------------------------------
                                                                                            

Common Stock, par value $.001 per share (2)         $90,000,000(3)                                $11,403


(1)  The aggregate amount to be registered and the aggregate  offering price per
     unit have been omitted  pursuant to  Securities  Act Release No. 6964.  The
     registration  fee has been calculated on the basis of the maximum  offering
     price of all  securities  listed in  accordance  with Rule 457(o) under the
     Securities Act of 1933.
(2)  An indeterminate  number of shares of common stock of the registrant as may
     be sold from time to time by the registrant.
(3)  In no event will the aggregate offering price of all securities issued from
     time to time pursuant to this prospectus exceed $90,000,000.





The registrant hereby amends this  registration  statement on such date or dates
as may be necessary to delay its effective date until the registrant  shall file
a further amendment which specifically  states that this registration  statement
shall  thereafter  become  effective  in  accordance  with  section  8(a) of the
Securities  Act of  1933  or  until  the  registration  statement  shall  become
effective on such date as the Commission,  acting pursuant to said section 8(a),
may determine.





The information in this prospectus is not complete and may be changed. We may
not sell these securities until the registration statement filed with the
Securities and Exchange Commission is effective. This prospectus is not an offer
to sell these securities and we are not soliciting an offer to buy these
securities in any state where the offer or sale is not permitted.


Prospectus          Subject to completion, October 25, 2004


                               [BIOENVISION LOGO]

                                Bioenvision, Inc.

                                   $90,000,000

                                  Common Stock

     From time to time, we may sell our common stock,  par value $.001 per share
(the "Common Stock"), in one or more offerings. The specific terms and number of
shares of Common Stock so offered will be fully described in supplements to this
prospectus. Please read any prospectus supplements and this prospectus carefully
before you  invest.  This  prospectus  may not be used to sell  shares of Common
Stock unless accompanied by a prospectus supplement.

     Our Common Stock is included for  quotation on the Nasdaq  National  Market
under the symbol  "BIVN".  The last reported sales price of shares of our common
stock on October 22, 2004 was $7.33 per share.

     We urge you to read carefully the "Risk Factors" section  beginning on page
3 where we describe  specific risks  associated with an investment in our Common
Stock before you make your investment decision.

     Neither the  Securities and Exchange  Commission  nor any state  securities
commission has approved or  disapproved  of these  securities or passed upon the
adequacy or accuracy of this prospectus. Any representation to the contrary is a
criminal offense.

     The shares of Common Stock may be sold directly by us to investors, through
agents  designated  from time to time or to or through  underwriters or dealers.
See "Plan of Distribution".  If any underwriters are involved in the sale of any
shares of Common Stock in respect of which this  prospectus is being  delivered,
the names of such underwriters and any applicable  commissions or discounts will
be set forth in a prospectus  supplement.  The net proceeds we expect to receive
from such sale also will be set forth in a prospectus supplement.

                The date of this prospectus is October ___, 2004.





                                TABLE OF CONTENTS


                                                                       Page
                                                                       ----

ABOUT THIS PROSPECTUS..................................................        1

BIOENVISION, INC.......................................................        1

RISK FACTORS...........................................................        3

FORWARD-LOOKING STATEMENTS.............................................       12

USE OF PROCEEDS........................................................       13

DESCRIPTION OF CAPITAL STOCK...........................................       13

PLAN OF DISTRIBUTION...................................................       14

LEGAL MATTERS..........................................................       16

EXPERTS................................................................       16

WHERE YOU CAN FIND MORE INFORMATION....................................       16

INCORPORATION BY REFERENCE.............................................       17

DISCLOSURE OF COMMISSION POSITION ON
INDEMNIFICATION FOR SECURITIES ACT LIABILITIES.........................       17





--------------------------------------------------------------------------------

                              ABOUT THIS PROSPECTUS

         This prospectus is part of a Registration Statement on Form S-3 that we
filed with the Securities and Exchange Commission utilizing a "shelf"
registration process. Under this shelf process, we may from time to time offer
Common Stock described in this prospectus in one or more offerings up to a total
dollar amount of $90,000,000. Each time we use this prospectus to offer shares
of Common Stock, we will provide a prospectus supplement that will contain
specific information about the terms of that offering. The prospectus supplement
may also add, update or change information contained in this prospectus. You
should read both this prospectus and any prospectus supplement together with
additional information described below under the heading "Where You Can Find
More Information".

         In this prospectus, "Bioenvision", "we", "us, and "our" and "the
Company" refer to Bioenvision, Inc.


                                BIOENVISION, INC.

         You should read the following  summary  together with the more detailed
information,  including  the  consolidated  financial  statements  and the notes
thereto and other information,  included, or incorporated by reference,  in this
prospectus.

         We are an emerging  biopharmaceutical company that develops and markets
drugs to treat  cancer.  Our two lead  drugs are  clofarabine  and  Modrenal(R),
although we have several other products and technologies under  development.  As
of October 11, 2004,  our internal  staff  consisted of nine  full-time and four
part-time employees based in New York, New York and Edinburgh, Scotland.

         Clofarabine is a small molecule,  purine nucleoside analogue,  which we
believe is effective in the  treatment of leukemia,  based upon our own clinical
studies and studies  conducted by others on our behalf.  Clofarabine may also be
an effective  agent to treat  patients with solid tumors,  based on  preclinical
studies and Phase I clinical trials performed to date.

         Modrenal(R)  is a hormonal agent with a novel mode of action that makes
it an effective  agent in patients with advanced breast cancer who have acquired
resistance to other hormonal agents. We launched  Modrenal(R) in May 2003 in the
United Kingdom,  where we have received  regulatory  approval for its use in the
treatment of  post-menopausal  breast cancer.  In the second quarter of 2005, we
intend  to  apply  for  mutual   recognition  in  another  four  large  European
territories  in an  effort  to  gain  approval  for  Modrenal(R)  in  each  such
territory.  We  anticipate  receiving  approval  in each such  territory  during
calendar  2005,  but such  approval  is  subject to the  appropriate  regulatory
decisions.

         Our  primary   business   strategy  relates  to  our  two  lead  drugs,
clofarabine and Modrenal(R).  With clofarabine, our strategy is to complete drug
development  in Europe  and obtain  marketing  authorization  from the  European
regulatory  authorities to market and  distribute  clofarabine in Europe for the
treatment of pediatric  and adult acute  leukemias  (ALL and AML). We anticipate
launching  clofarabine in Europe in mid-2005,  subject to our obtaining from the
European  regulatory  authorities  the first approval for  clofarabine  which is
expected to be for pediatric  acute  leukemias.  We intend to continue  clinical
trials in other  indications  with the intention of  aggressively  seeking label
extensions after  clofarabine's  first approval,  including our Pivotal Phase II
trial of clofarabine in adults with Acute Myeloid Leukemia (AML) which commenced
in August 2004 and is ongoing.  Following this  strategy,  throughout the world,
approximately  two-thirds of the cancer patients dosed with  clofarabine to date
fall outside of the pediatric acute leukemias.

         In July 2004, we filed for approval of  clofarabine  in Europe to treat
children with pediatric acute leukemia (ALL and AML). Further, we are conducting
a Pivotal Phase II clinical trial of clofarabine,  as first line therapy for the
treatment of adults with Acute Myeloid  Leukemia (AML).  Also in Europe,  at our
direction,  an Investigator Sponsored Trial of clofarabine as first-line therapy
for adults  with AML was  completed  ahead of schedule  and an interim  analysis
indicates a 64% complete response rate observed in this patient  population.  In
January,  2002, the European  orphan drug  application for use of clofarabine to
treat acute leukemia in adults was approved.  Orphan Drug  Designation  provides
the Company with ten years of market exclusivity in Europe for clofarabine, upon
grant of marketing  authorization.  The drug has also been  granted  orphan drug
status and "fast track"  treatment by the FDA.  Further,  in July 2004,  the FDA
granted six months of extended market  exclusivity to clofarabine under the Best
Pharmaceuticals for Children Act.

         In the U.S., ILEX Oncology, Inc., our sub-licensor of U.S. and Canadian
cancer marketing rights,  filed a New Drug Application ("NDA") in March 2004 for
approval of clofarabine to treat children with acute leukemias (ALL or AML). The
NDA was based upon results of two Pivotal Phase II clinical trials  completed by
ILEX prior to the NDA filing. In connection with the NDA, the United States Food
and Drug  Administration  (the "FDA") has set a  Prescription  Drug User Fee Act
("PDUFA") response date at December 30, 2004. A PDUFA date is the is the date by
which the FDA is expected to review and act upon an NDA submission.  Clofarabine
will be  reviewed  by the FDA  Oncologic  Drug  Advisory  Committee  ("ODAC") on
December 1, 2004.

         In August 2003, we obtained the exclusive,  irrevocable option to sell,
market and distribute  clofarabine in Japan and

--------------------------------------------------------------------------------





Southeast  Asia  from  the  inventor  of  clofarabine.  These  rights  were  not
previously  granted by Southern Research Institute and fall outside the scope of
our  then  current   licensing  and   development   contracts  with  respect  to
clofarabine.  We originally obtained an exclusive license from Southern Research
Institute  to sell,  market and  distribute  clofarabine  throughout  the world,
except for Japan and Southeast Asia, for all human  applications,  pursuant to a
co-development  agreement,  dated  August 31,  1998,  between  the  Company  and
Southern Research  Institute.  On March 12, 2001, we granted an exclusive option
to sell,  market  and  distribute  clofarabine  in the U.S.  and  Canada to ILEX
Oncology, Inc. We converted ILEX's option to an exclusive sublicense on December
30,  2003.  Accordingly,  we do not  possess  the  rights  to sell,  market  and
distribute clofarabine for cancer indications in the U.S.

         With Modrenal(R), our strategy is to expand sales in the United Kingdom
and apply for mutual  recognition  to obtain the right to market and  distribute
Modrenal(R)  in the major  European  markets.  We  anticipate  receiving  mutual
recognition from major European  Community member states by the third quarter of
calendar 2005. We intend to further U.S.  development of Modrenal(R) in prostate
and breast cancer  indications,  subject to the ongoing  results of our clinical
trials we are currently conducting in the U.S. and Europe.

         In the U.S., we filed an IND to conduct Modrenal(R) clinical trials for
prostate  cancer in  February  2004 and  commenced  enrolling  patients  in this
clinical trial in July 2004.  Further, we intend to seek regulatory approval for
Modrenal(R) in the United States as salvage therapy for hormone-sensitive breast
cancer upon completion of additional clinical studies. We originally obtained an
exclusive  license  from  Stegram  Pharmaceuticals  Ltd.  to  sell,  market  and
distribute  Modrenal(R)  throughout the world,  except for South Africa, for all
human and animal health  applications,  pursuant to a  co-development  agreement
dated July 15, 1998.

         Our secondary business strategy is to continue to develop our portfolio
of ancillary products and technologies. We anticipate that revenues derived from
clofarabine  and  Modrenal(R)  and  milestone  payments and  royalties  from the
ancillary  products will permit us to further develop our portfolio of ancillary
products and technologies.


         We were incorporated as Express Finance, Inc. under the laws of the
State of Delaware on August 16, 1996, and changed our name to Ascot Group, Inc.
in August 1998 and further to Bioenvision, Inc. in December 1998. Our principal
executive offices are located at 509 Madison Avenue, Suite 404 , New York, New
York 10022. Our telephone number is (212) 750-6700 and our fax number is (212)
750-6777. Our website is www.bioenvision.com. Information contained on our
website does not constitute, and shall not be deemed to constitute, part of this
prospectus.


                                      -2-



                                  RISK FACTORS

         You should carefully  consider the following risks before you decide to
buy our Common Stock.  All known risks are presented in this  prospectus.  These
risks may  adversely  affect our  business,  financial  condition  or  operating
results. If any of the events we have identified occur, the trading price of our
Common Stock could  decline,  and you may lose all or part of the money you paid
to buy our Common Stock.

We have a limited  operating  history,  which makes it difficult to evaluate our
business and to predict our future operating results

         Since our inception,  August of 1996, we have been primarily engaged in
organizational  activities,  including  developing a strategic  operating  plan,
entering into various  collaborative  agreements for the development of products
and technologies,  hiring personnel and developing and testing our products.  We
have not  generated  any  material  revenues  to date.  Accordingly,  we have no
relevant  operating  history upon which an  evaluation  of our  performance  and
prospects can be made.

We have incurred net losses since commencing business and expect future losses

          To date, we have incurred significant net losses, including net losses
of  approximately  $11,574,000  for the fiscal year ended June 30, 2004. At June
30,  2004,  we had an  accumulated  deficit  of  approximately  $41,082,000.  We
anticipate that we may continue to incur  significant  operating  losses for the
foreseeable   future.  We  may  never  generate  material  revenues  or  achieve
profitability  and,  if we do  achieve  profitability,  we may  not be  able  to
maintain profitability.

Clinical  trials for our products will be expensive  and may be time  consuming,
and their outcome is uncertain,  but we must incur substantial expenses that may
not result in any viable products

         Before  obtaining  regulatory  approval  for the  commercial  sale of a
product,  we must demonstrate through  pre-clinical  testing and clinical trials
that a product  candidate is safe and  effective  for use in humans.  Conducting
clinical  trials is a lengthy,  time-consuming  and expensive  process.  We will
incur  substantial  expense  for,  and  devote a  significant  amount of time to
pre-clinical  testing  and  clinical  trials.  Even with  Modrenal(R),  which is
approved  and  marketed  by us in  the  U.K.  for  the  treatment  of  advanced,
post-menopausal  breast  cancer,  we are conducting a Phase II Clinical Trial in
the U.S. in prostate  cancer and a Phase II Clinical  Trial in the U.K.  for the
treatment of  pre-menopausal  breast  cancer,  each of which is a new  potential
indication for this approved drug.

         Historically,  the results from pre-clinical testing and early clinical
trials have often not been  predictive  of results  obtained  in later  clinical
trials.  A number of new drugs have shown promising  results in clinical trials,
but  subsequently  failed to establish  sufficient  safety and efficacy  data to
obtain  necessary  regulatory  approvals.  Data obtained from  pre-clinical  and
clinical activities are susceptible to varying interpretations, which may delay,
limit or prevent  regulatory  approval.  Regulatory  delays or rejections may be
encountered as a result of many factors,  including changes in regulatory policy
during the period of product  development.  Regulatory  authorities  may require
additional   clinical  trials,   which  could  result  in  increased  costs  and
significant  development delays.  Clofarabine currently is at a pivotal stage of
its development,  but many of our other products and technologies are at various
less mature stages of  development  including  l-gossypol for which we have just
commenced  a Phase I  clinical  trial in the  U.K.  and  gene  therapy  which is
currently in pre-clinical and phase I clinical testing.

         Completion of clinical trials for any product may take several years or
more. The length of time generally varies  substantially  according to the type,
complexity,  novelty and intended use of the product candidate. Our commencement
and rate of  completion  of  clinical  trials may be  delayed  by many  factors,
including:

         o        inability of vendors to manufacture  sufficient  quantities of
                  materials for use in clinical trials;

         o        slower  than   expected   rate  of  patient   recruitment   or
                  variability in the number and types of patients in a study;

         o        inability to adequately follow patients after treatment;

         o        unforeseen safety issues or side effects;

         o        lack of efficacy during the clinical trials; or

         o        government or regulatory delays.


                                      -3-



Our intangible assets constitute a significant  portion of our assets and relate
to ancillary products which may not be successfully commercialized

         Our ancillary products include OLIGON and Methylene Blue which are
anti-microbial agents that we acquired in February 2002. As of June 30, 2004,
our intangible assets associated with these products amounted to approximately
$14.6 million and constituted approximately 33% of our total assets and
approximately 53% of our stockholders' equity. We amortize approximately $1.3
million of this amount each year for the estimated useful life of these products
of approximately 13 years.

         We do not currently devote any significant time or resources to the
research and development of OLIGON and Methylene Blue and only intend to do so
if and to the extent we successfully commercialize our lead drugs, clofarabine
and Modrenal(R), over the next two years. If at any time in the future
management determines that the carrying amount of these assets is not
recoverable, we would need to write down the value of these assets. Based on the
estimated useful life of these assets of approximately 13 years and market
considerations, no assurance can be given that there will not be an impairment
of these assets in the future. Any impairment of these assets could result in a
material impact on our future results of operations.

If our development  agreement with ILEX does not proceed as planned we may incur
delay in the commercialization of clofarabine,  which would delay our ability to
generate sales and cash flow from the sale of clofarabine

         ILEX,  and any third party to which ILEX may grant a  sublicense  or in
any way transfer its  obligations,  has primary  responsibility  for  conducting
clinical trials and administering  regulatory compliance and approval matters in
the  United  States  and  Canada  pursuant  to the  terms of our  co-development
agreement with ILEX. While there are target dates for completion, that agreement
allows  ILEX  time  to  continue   working  beyond  those  dates  under  certain
circumstances.  For  example,  under  the  co-development  agreement,  ILEX  was
required to complete  Pivotal  Phase II Trials not later than December 31, 2002,
but  ILEX  failed  to do so.  In this  situation  the  co-development  agreement
provides that the milestone  shall be adjusted such that ILEX receives more time
to complete  the pivotal  trials if the trials are ongoing at December  31, 2002
and progressing to completion within a reasonable time thereafter. Further, ILEX
was  required  under  the  co-development  agreement  to have  filed a New  Drug
Application  by August 31, 2003,  subject to extension if ILEX  continues to use
its  reasonable  efforts to promptly  complete the filing after August 31, 2003.
ILEX continued to use its reasonable efforts to complete the filing after August
31, 2003 and in October 2003,  Ilex filed the first part of a "rolling NDA" with
the FDA.

         If  ILEX  fails  to  meet  its  obligations  under  the  co-development
agreement,   we  could  lose  valuable  time  in  developing   clofarabine   for
commercialization  both in the U.S. and in Europe.  We can not provide assurance
that  ILEX  will not  fail to meet  its  obligations  under  the  co-development
agreement.  Development of compounds to the stage of approval  includes inherent
risk at each stage of development  that FDA, in its  discretion,  will mandate a
requirement not foreseeable by us or by ILEX. There would also be testing delays
if, for example, our sources of drug supply could not produce enough clofarabine
to support the then ongoing  clinical  trials being  conducted.  If this were to
occur,  it could  have a  material  adverse  effect on our  ability  to  develop
clofarabine,  obtain necessary regulatory approvals, and generate sales and cash
flow from the sale of clofarabine.

         If  delays  in  completion  constitute  a breach  by ILEX or there  are
certain other  breaches of the  co-development  agreement by ILEX,  then, at our
discretion,  the primary  responsibility  for completion would revert to us, but
there is no assurance that we would have the financial,  managerial or technical
resources to complete such tasks in timely fashion or at all.

We have limited experience in developing products and may be unsuccessful in our
efforts to develop products

         To  achieve  profitable  operations,  we,  alone or with  others,  must
successfully  develop,  clinically  test,  market and sell our products.  We are
developing clofarabine with ILEX Oncology, our U.S.  co-development partner, but
on February  26,  2004,  Genzyme  announced a merger  pursuant to which  Genzyme
intends  to  acquire  ILEX  in a  merger  transaction.  If this  transaction  is
consummated,  no  assurance  can be given that the  operational  and  managerial
relations  with  Genzyme  will  proceed  favorably  or  that  the  timeline  for
development  of  clofarabine  will  not be  elongated.  If the  U.S.  regulatory
timeline is elongated,  this could  materially and adversely affect the European
regulatory timeline for the approval of clofarabine.

         With respect to our co-lead  drug,  Modrenal(R),  we currently  have an
Investigational  New  Drug  Application  filed  with FDA to  conduct  a Phase II
Clinical  Trial in the U.S. to  determine  efficacy of  Modrenal(R)  in prostate
cancer  patients.  This Phase II Clinical  Trial is being  conducted at the Mass
General  Hospital  in Boston,  MA. To our  knowledge,  Modrenal(R)  has not been
tested  in this  indication  in the  past and  there  can be no  assurance  that
Modrenal(R)  will be an  effective  therapy in  prostate  cancer.  Further,  our
long-term drug development objectives for Modrenal(R) include attempting to test
the drug and get approval in the U.S. for treatment of advanced  post-menopausal
breast cancer patients. These trials will take significant time and resource and
no  assurance  can be given that  developing  the drug in this  indication  will
result in a U.S.  approval for  Modrenal(R) in advanced  post-menopausal  breast
cancer patients.


                                      -4-



         Generally,  most  products  resulting  from  our or  our  collaborative
partners' product  development efforts are not expected to be available for sale
for at least  several  years,  if at all.  Potential  products that appear to be
promising at early stages of  development  may not reach the market for a number
of reasons, including:

o        discovery  during  pre-clinical  testing or  clinical  trials  that the
         products are ineffective or cause harmful side effects;

o        failure to receive necessary regulatory approvals;

o        inability to manufacture on a large or economically feasible scale;

o        failure to achieve market acceptance; or

o        preclusion  from  commercialization  by  proprietary  rights  of  third
         parties.


         Most of the existing and future products and technologies  developed by
us will require extensive additional development, including pre-clinical testing
and   clinical   trials,   as   well   as   regulatory   approvals,   prior   to
commercialization. Our product development efforts may not be successful. We may
fail to receive required  regulatory  approvals from U.S. or foreign authorities
for any  indication.  Any products,  if introduced,  may not be capable of being
produced in  commercial  quantities at  reasonable  costs or being  successfully
marketed.  The failure of our research and  development  activities to result in
any  commercially  viable products or technologies  would  materially  adversely
affect our future prospects.

Our  industry is subject to  extensive  government  regulation  and our products
require other regulatory  approvals which makes it more expensive to operate our
business

         Regulation  in  General.  Virtually  all  aspects of our  business  are
regulated by federal and state statutes and governmental  agencies in the United
States and other  countries.  Failure to comply  with  applicable  statutes  and
government  regulations  could have a material  adverse effect on our ability to
develop and sell products  which would have a negative  impact on our cash flow.
The development, testing, manufacturing,  processing, quality, safety, efficacy,
packaging, labeling,  record-keeping,  distribution,  storage and advertising of
pharmaceutical  products,  and  disposal of waste  products  arising  from these
activities,  are subject to  regulation by one or more federal  agencies.  These
activities are also regulated by similar state and local agencies and equivalent
foreign  authorities.  In our  material  contracts  with vendors  providing  any
portion of these types of services,  we seek  assurances that our vendors comply
and  will  continue  to  maintain  compliance  with  all  applicable  rules  and
regulations.  This is the case, for example,  with respect to our contracts with
Ferro  Pfanstiehl and Penn  Pharmaceuticals.  No assurance can be given that our
most  significant   vendors  will  continue  to  comply  with  these  rules  and
regulations.

         FDA Regulation.  All pharmaceutical  manufacturers in the United States
are subject to  regulation  by the FDA under the  authority of the Federal Food,
Drug,  and Cosmetic  Act.  Under the Act, the federal  government  has extensive
administrative   and  judicial   enforcement   powers  over  the  activities  of
pharmaceutical  manufacturers to ensure  compliance with FDA regulations.  Those
powers include, but are not limited to the authority to:

o        initiate court action to seize unapproved or non-complying products;

o        enjoin non-complying activities;

o        halt  manufacturing  operations that are not in compliance with current
         good manufacturing practices prescribed by the FDA;

o        recall products which present a health risk; and

o        seek civil monetary and criminal penalties.

         Other  enforcement   activities  include  refusal  to  approve  product
applications  or  the  withdrawal  of  previously  approved  applications.   Any
enforcement  activities,  including the  restriction  or prohibition on sales of
products marketed by us or the halting of manufacturing  operations of us or our
collaborators,  would have a material  adverse  effect on our ability to develop
and sell  products  which  would  have a negative  impact on our cash  flow.  In
addition, product recalls may be issued at our discretion or by the FDA or other
domestic  and  foreign  government  agencies  having  regulatory  authority  for
pharmaceutical product sales. Recalls may occur due to disputed labeling claims,
manufacturing   issues,   quality   defects   or  other   reasons.   Recalls  of
pharmaceutical  products  marketed  by us may occur in the  future.  Any product
recall could have a material adverse effect on our revenue and cash flow.

         FDA Approval Process.  We have a variety of products under development,
including  line  extensions  of existing  products,  reformulations  of existing
products  and  new  products.  All  "new  drugs"  must  be  the  subject  of  an
FDA-approved  new drug  application  before  they may be  marketed in the United
States. All generic equivalents to previously approved drugs or new dosage forms
of existing drugs must be the subject of an  FDA-approved  abbreviated  new drug
application before they may by marketed in the United States. In both cases, the
FDA has the authority to determine what testing procedures are appropriate for a
particular product and, in


                                      -5-



some instances,  has not published or otherwise identified  guidelines as to the
appropriate procedures.  The FDA has the authority to withdraw existing new drug
application and abbreviated  application  approvals and to review the regulatory
status of products marketed under the enforcement policy. The FDA may require an
approved new drug  application or abbreviated  application  for any drug product
marketed under the enforcement policy if new information reveals questions about
the drug's safety or effectiveness. All drugs must be manufactured in conformity
with current good  manufacturing  practices and drugs subject to an approved new
drug application or abbreviated  application  must be  manufactured,  processed,
packaged,  held and labeled in accordance with information  contained in the new
drug application or abbreviated application.

         The required  product testing and approval process can take a number of
years and require  the  expenditure  of  substantial  resources.  Testing of any
product  under  development  may not  result in a  commercially-viable  product.
Further,  we may decide to modify a product in testing,  which could  materially
extend the test  period and  increase  the  development  costs of the product in
question.  Even after time and expenses,  regulatory approval by the FDA may not
be obtained for any products we develop.  In addition,  delays or rejections may
be  encountered  based upon  changes in FDA policy  during the period of product
development and FDA review.  Any regulatory  approval may impose  limitations in
the indicated use for the product.  Even if regulatory  approval is obtained,  a
marketed product, its manufacturer and its manufacturing  facilities are subject
to continual review and periodic inspections. Subsequent discovery of previously
unknown  problems  with a  product,  manufacturer  or  facility  may  result  in
restrictions on the product or manufacturer, including withdrawal of the product
from the market.

         Foreign  Regulatory  Approval.  Even if required  FDA approval has been
obtained  with respect to a product,  foreign  regulatory  approval of a product
must also be obtained  prior to marketing the product  internationally.  Foreign
approval  procedures  vary from  country to country  and the time  required  for
approval  may  delay or  prevent  marketing.  In  certain  instances,  we or our
collaborative partners may seek approval to market and sell some of our products
outside of the United States before  submitting an  application  for approval to
the FDA.  The  clinical  testing  requirements  and the time  required to obtain
foreign  regulatory  approvals  may differ from that  required for FDA approval.
Although there is now a centralized  European  Union approval  mechanism for new
pharmaceutical  products in place,  each European Union country may  nonetheless
impose its own procedures and requirements, many of which are time consuming and
expensive,  and some European Union countries  require price approval as part of
the  regulatory  process.  Thus,  there can be  substantial  delays in obtaining
required approval from both the FDA and foreign regulatory authorities after the
relevant applications are filed.

         Changes in Requirements.  The regulatory requirements applicable to any
product may be modified in the future.  We cannot  determine what effect changes
in regulations or statutes or legal  interpretations may have on our business in
the future. Changes could require changes to manufacturing methods,  expanded or
different  labeling,  the  recall,  replacement  or  discontinuation  of certain
products, additional record keeping and expanded documentation of the properties
of  certain  products  and  scientific   substantiation.   Any  changes  or  new
legislation  could have a material  adverse effect on our ability to develop and
sell products and, therefore, generate revenue and cash flow.

         The products under development by us may not meet all of the applicable
regulatory  requirements needed to receive regulatory  marketing approval.  Even
after we expend substantial resources on research,  clinical development and the
preparation  and  processing of regulatory  applications,  we may not be able to
obtain  regulatory  approval  for  any of  our  products.  Moreover,  regulatory
approval for marketing a proposed pharmaceutical product in any jurisdiction may
not result in similar approval in other jurisdictions. Our failure to obtain and
maintain  regulatory  approvals  for  products  under  development  would have a
material  adverse  effect on our  ability  to  develop  and sell  products  and,
therefore, generate revenue and cash flow.

We may not be  successful  in  receiving  orphan  drug status for certain of our
products or, if that status is obtained,  fully  enjoying the benefits of orphan
drug status

         Under the Orphan Drug Act, the FDA may grant orphan drug designation to
drugs intended to treat a rare disease or condition. A disease or condition that
affects  populations of fewer than 200,000 people in the United States generally
constitutes a rare disease or  condition.  We may not be successful in receiving
orphan drug status for certain of our products.  Orphan drug designation must be
requested before submitting a new drug application.  After the FDA grants orphan
drug  designation,  the  generic  identity  of the  therapeutic  agent  and  its
potential  orphan use are publicized by the FDA. Under current law,  orphan drug
status is conferred upon the first company to receive FDA approval to market the
designated  drug for the designated  indication.  Orphan drug status also grants
marketing exclusivity in the United States for a period of seven years following
approval  of the new drug  application,  subject  to  limitations.  Orphan  drug
designation  does not provide any  advantage in, or shorten the duration of, the
FDA regulatory  approval  process.  Although  obtaining FDA approval to market a
product with orphan drug status can be advantageous,  the scope of protection or
the level of marketing  exclusivity  that is  currently  afforded by orphan drug
status and marketing approval may not remain in effect in the future.


                                      -6-



         Our business  strategy  involves  obtaining orphan drug designation for
certain of the oncology products we have under development. Although clofarabine
has  received  orphan  drug  designation  with the FDA and EMEA,  we do not know
whether  any of our other  products  will  receive an orphan  drug  designation.
Orphan drug designation does not prevent other  manufacturers from attempting to
develop  similar  drugs for the  designated  indication  or from  obtaining  the
approval of a new drug  application  for their drug prior to the approval of our
new drug application.  If another sponsor's new drug application for a competing
drug in the same  indication  is  approved  first,  that  sponsor is entitled to
exclusive  marketing rights if that sponsor has received orphan drug designation
for its drug. In that case,  the FDA would refrain from approving an application
by us to market our competing  product for seven years,  subject to limitations.
Competing  products  may receive  orphan  drug  designations  and FDA  marketing
approval before the products under development by us.

         New  drug  application   approval  for  a  drug  with  an  orphan  drug
designation  does  not  prevent  the FDA  from  approving  the  same  drug for a
different  indication,  or a molecular  variation  of the same drug for the same
indication.  Because  doctors are not restricted by the FDA from  prescribing an
approved drug for uses not approved by the FDA, it is also possible that another
company's drug could be prescribed for indications for which products  developed
by us have received orphan drug  designation and new drug  application  approval
and the same is true with the EMEA in Europe.  Prescribing of approved drugs for
unapproved  uses,  commonly  referred to as "off label" sales,  could  adversely
affect the  marketing  potential of products  that have  received an orphan drug
designation and new drug application approval. In addition, new drug application
approval  of a drug  with an  orphan  drug  designation  does  not  provide  any
marketing exclusivity in foreign markets.

         The  possible  amendment  of the Orphan  Drug Act by the United  States
Congress has been the subject of frequent  discussion.  Although no  significant
changes to the Orphan Drug Act have been made for a number of years,  members of
Congress  have from  time to time  proposed  legislation  that  would  limit the
application of the Orphan Drug Act. The precise scope of protection  that may be
afforded by orphan drug  designation  and  marketing  approval may be subject to
change in the future.

The use of our products may be limited or eliminated by professional  guidelines
which would decrease our sales of these products and, therefore, our revenue and
cash flows.

         In addition to government agencies,  private health/science foundations
and  organizations  involved in various diseases may also publish  guidelines or
recommendations  to  the  healthcare  and  patient  communities.  These  private
organizations may make recommendations that affect the usage of therapies, drugs
or procedures,  including  products developed by us. These  recommendations  may
relate to matters  such as usage,  dosage,  route of  administration  and use of
concomitant  therapies.  Recommendations  or  guidelines  that are  followed  by
patients  and  healthcare  providers  and that result in,  among  other  things,
decreased use or elimination  of products  developed by us could have a material
adverse  effect on our revenue and cash flows.  For example,  if  clofarabine is
definitively  determined in clinical trials to be an active agent to treat solid
tumor cancer patients, but the required dose is high, private healthcare/science
foundations  could recommend  various other regimens of treatment which may from
time to time show activity at lower doses.

Generic  products  which  third  parties  may  develop  may render our  products
noncompetitive or obsolete

         An increase in competition from generic  pharmaceutical  products could
have a material adverse effect on our ability to generate revenue and cash flow.
For example,  many of the indications in which clofarabine and Modrenal(R),  our
co-lead drugs, have demonstrated activity are areas of unmet clinical need, such
as clofarabine's  application to pediatric acute leukemias in which,  initially,
the drug will be used as a salvage  therapy,  after other  regimens of treatment
have failed. Our lead  investigators,  who have assisted with the development of
Modrenal(R),  envision,  initially,  that Modrenal(R) would be used as second or
third line therapy,  only after  patients with advanced  post-menopausal  breast
cancer receive  regimens of tamoxifen  and/or  aromatase  inhibitors (or similar
drug)  treatments.  If generic drug  companies  develop a compound which is more
effective  than  either  clofarabine  or  Modrenal(R)  in  these  areas of unmet
clinical  need, or equally as effective but at lower doses,  it could  adversely
affect our market and/or render our drugs obsolete.

Because many of our competitors  have  substantially  greater  capabilities  and
resources,  they may be able to  develop  products  before  us or  develop  more
effective products or market them more effectively which would limit our ability
to generate revenue and cash flow

         Competition  in our industry is intense.  Potential  competitors in the
United States and Europe are numerous and include  pharmaceutical,  chemical and
biotechnology  companies,  most of  which  have  substantially  greater  capital
resources, marketing experience,  research and development staffs and facilities
than us.  Potential  competitors  for  certain  indications  of our  lead  drugs
include,  with respect to clofarabine,  Schering AG, which markets  fludarabine,
and certain generic drug companies in Europe which could market fludarabine upon
expiry of the patent  protections held by Schering.  Potential  competitors with
respect to Modrenal(R) include Astra-zeneca and Novartis, which market tamoxifen
and other aromatase  inhibitors,  which could be used by clinicians as first and
second  line   therapies   in  patients   with  hormone   sensitive,   advanced,
post-menopausal breast cancer prior to a Modrenal(R) regimen


                                      -7-



of treatment.  No assurance can be given that the ongoing business activities of
our  competitors  will  not  have a  material  adverse  effect  on our  business
prospects and projections going forward.

         Although  we  seek  to  limit  potential   sources  of  competition  by
developing  products that are eligible for orphan drug  designation and new drug
application  approval or other forms of protection,  our competitors may develop
similar  technologies  and  products  more  rapidly  than us or market them more
effectively.  Competing technologies and products may be more effective than any
of those that are being or will be developed by us. The generic drug industry is
intensely   competitive   and  includes   large  brand  name  and   multi-source
pharmaceutical companies. Because generic drugs do not have patent protection or
any other market  exclusivity,  our competitors may introduce  competing generic
products,  which may be sold at lower prices or with more aggressive  marketing.
Conversely,  as we introduce branded drugs into our product  portfolio,  we will
face  competition  from  manufacturers of generic drugs which may claim to offer
equivalent  therapeutic  benefits  at a  lower  price.  The  aggressive  pricing
activities of our generic  competitors  could have a material  adverse effect on
our operations, revenue and cash flow.

If we fail to keep up with rapid  technological  change and evolving  therapies,
our technologies and products could become less competitive or obsolete

         The  pharmaceutical  industry is characterized by rapid and significant
technological change. We expect that pharmaceutical  technology will continue to
develop  rapidly,  and our future  success will depend on our ability to develop
and maintain a competitive  position.  Technological  development  by others may
result in products developed by us, branded or generic, becoming obsolete before
they are marketed or before we recover a significant  portion of the development
and  commercialization   expenses  incurred  with  respect  to  these  products.
Alternative  therapies or new medical  treatments could alter existing treatment
regimes,  and thereby reduce the need for one or more of the products  developed
by us,  which  would  adversely  affect  our  revenue  and cash  flow.  See also
"--Generic  products  which third  parties  may develop may render our  products
noncompetitive or obsolete" above.

We depend on others for clinical  testing of our products  which could delay our
ability to develop products

         We do not currently have any internal product testing capabilities. Our
inability  to retain  third  parties  for the  clinical  testing of  products on
acceptable  terms would adversely  affect our ability to develop  products.  Any
failures by third parties to adequately perform their responsibilities may delay
the  submission  of  products  for  regulatory  approval,  impair our ability to
deliver products on a timely basis or otherwise impair our competitive position.
Our  dependence on third parties for the  development  of products may adversely
affect our  potential  profit  margins  and our  ability to develop  and deliver
products on a timely basis.

We depend on others to manufacture our products and have not  manufactured  them
in significant quantities

         We have never manufactured any products in commercial  quantities,  and
the  products  being  developed  by  us  may  not  be  suitable  for  commercial
manufacturing in a cost-effective manner. Manufacturers of products developed by
us will be subject to current good manufacturing practices prescribed by the FDA
or other rules and regulations prescribed by foreign regulatory authorities.  We
may not be able to enter into or maintain  relationships  either domestically or
abroad  with  manufacturers  whose  facilities  and  procedures  comply  or will
continue to comply with  current  good  manufacturing  practices  or  applicable
foreign  requirements.  Failure by a manufacturer of our products to comply with
current good manufacturing  practices or applicable  foreign  requirements could
result in significant  time delays or our inability to commercialize or continue
to market a product  and could  have a material  adverse  effect on our sales of
products and, therefore,  our cash flow. In the United States, failure to comply
with current good manufacturing practices or other applicable legal requirements
can lead to federal seizure of violative products, injunctive actions brought by
the federal  government,  and potential criminal and civil liability on the part
of a company and our officers and employees.

We have limited  sales and  marketing  capability,  and may not be successful in
selling or marketing our products

         The creation of infrastructure to commercialize  oncology products is a
difficult, expensive and time-consuming process. We may not be able to establish
direct or indirect  sales and  distribution  capabilities  or be  successful  in
gaining market  acceptance for proprietary  products or for other  products.  We
currently  have very  limited  sales and  marketing  capabilities.  We currently
employ one full-time  sales employee and one full-time  marketing  employee.  To
market any products  directly,  we will need to develop a more fulsome marketing
and sales force with technical expertise and distribution capability or contract
with other pharmaceutical and/or health care companies with distribution systems
and direct sales forces.  To the extent that we enter into co-promotion or other
licensing  arrangements,  any revenues to be received by us will be dependent on
the  efforts  of  third  parties.  The  efforts  of  third  parties  may  not be
successful.  Our failure to establish marketing and distribution capabilities or
to enter into marketing and distribution  arrangements  with third parties could
have a material adverse effect on our revenue and cash flows.

If we lose key management our business will suffer


                                      -8-



         We are highly  dependent on our Chief Executive  Officer to develop our
lead drug. Dr. Wood has an employment agreement with the Company, dated December
31,  2002,  for an initial term of one year which  automatically  extends for an
additional one year periods until either party gives the other written notice of
termination  at least 90 days prior to the end of the current term.  Dr. Wood is
not near  retirement age and he does not, to our knowledge,  plan on leaving the
Company in the near  future.  Dr. Wood is one of the founders of the company and
he is  intimately  familiar  with the science that  underlies our lead drugs and
ancillary  technologies.  He  also  maintains  a  position  on  the  clofarabine
management team that is responsible for all drug development activities relating
to that lead drug, and has been  instrumental in the development and maintenance
of our key relationships within the scientific research and medical communities,
and those with our vendors, inventors, co-development partners and licensors. If
Dr. Wood was no longer  employed by the company,  the  development  of our drugs
would be significantly delayed and otherwise would be adversely impacted, and we
may be unable to maintain and develop these important relationships.

Need for additional personnel

         The Company will be required to hire additional qualified scientific
and technical personnel, as well as personnel with expertise in clinical testing
and government regulation to expand our research and development programs and
pursue our product development and marketing plans. There is intense competition
for qualified personnel in the areas of the Company's activities, and there can
be no assurance that the Company will be able to attract and retain the
qualified personnel necessary for the development of its business. The Company
faces competition for qualified individuals from numerous pharmaceutical and
biotechnology companies, universities and research institutions. The failure to
attract and retain key scientific, marketing and technical personnel would have
a material adverse effect on the development of the Company's business and our
ability to develop, market and sell our products. See also "- We have limited
sales and marketing capability, and may not be successful in selling or
marketing our products" above.

Our management and internal  systems might be inadequate to handle our potential
growth

         Our success  will depend in  significant  part on the  expansion of our
operations  and the  effective  management  of growth.  This growth has and will
continue to place a significant strain on our management and information systems
and resources and  operational  and financial  systems and resources.  To manage
future  growth,  our  management  must continue to improve our  operational  and
financial  systems and expand,  train,  retain and manage our employee base. Our
management  may not be able to manage our growth  effectively.  If our  systems,
procedures,  controls,  and resources are inadequate to support our  operations,
our expansion  would be halted or delayed and we could lose our  opportunity  to
gain  significant  market share or the timing with which we would otherwise gain
significant  market share.  Any inability to manage growth  effectively may harm
our  ability  to  institute  our  business  plan.  The  strain  on our  systems,
procedures,  controls and  resources is further  heightened by the fact that our
executive office and operational  development facilities are located in separate
time zones (New York, New York and Edinburgh, Scotland, respectively).


We  depend  on  patent  and  proprietary  rights  to  develop  and  protect  our
technologies and products, which rights may not offer us sufficient protection

         The pharmaceutical industry places considerable importance on obtaining
patent and trade secret protection for new technologies, products and processes.
Our success  will depend on our  ability to obtain and  enforce  protection  for
products that we develop  under United States and foreign  patent laws and other
intellectual  property laws,  preserve the  confidentiality of our trade secrets
and operate without infringing the proprietary rights of third parties.  Through
our  current  license  agreements,  we have  acquired  the right to utilize  the
technology  covered  by  issued  patents  and  patent  applications,  as well as
additional  intellectual  property  and  know-how  that could be the  subject of
further patent  applications in the future.  Several of the original  patents to
Modrenal(R)  have expired in the United States and foreign  countries.  Thus, we
and our licensors are pursuing patent applications to specific uses, combination
therapy and dosages or  formulations of  Modrenal(R).  We cannot  guarantee that
such  applications  will result in issued patents or that such patents if issued
will provide adequate protection against competitors.  Patents may not be issued
from these  applications and issued patents may not give us adequate  protection
or a  competitive  advantage.  Issued  patents may be  challenged,  invalidated,
infringed or circumvented,  and any rights granted thereunder may not provide us
with competitive advantages. Parties not affiliated with us have obtained or may
obtain  United States or foreign  patents or possess or may possess  proprietary
rights  relating to products  being  developed or to be developed by us. Patents
now in  existence  or  hereafter  issued  to others  may  adversely  affect  the
development or commercialization of products developed or to be developed by us.
Our planned  activities  may infringe  patents  owned by others.  Our patents to
clofarabine are licensed from Southern Research Institute. The current projected
expiration date of the license is March 2021. These patents cover pharmaceutical
compositions  and methods of using  clofarabine.  We cannot guarantee that these
patents  would  survive an attack on their  validity or that they will provide a
competitive  advantage over our competitors.  Moreover, we cannot guarantee that
Southern Research  Institute was the first to invent the subject matter of these
patents. In addition,  we are aware of a third party patent which is directed to
the  treatment of chronic  myeloid  leukemia  ("CML")  using  specific  doses of
clofarabine. We do not believe that we will infringe this patent. If this patent
is asserted  against us, even though we may be successful  in defending  against
such an assertion,  our defense would  require  substantial  financial and human
resources.  And, we may


                                      -9-



need a license to this patent to use the claimed  dose in the  treatment of CML.
However,  we do not  know  if  such  a  license  is  available  at  commercially
reasonable terms, if at all.

         We could  incur  substantial  costs  in  defending  infringement  suits
brought  against us or any of our  licensors  or in asserting  any  infringement
claims that we may have against others. We could also incur substantial costs in
connection  with any suits  relating  to  matters  for  which we have  agreed to
indemnify our licensors or  distributors.  An adverse  outcome in any litigation
could have a material  adverse  effect on our  ability to sell  products  or use
patents in the future.  In  addition,  we could be  required to obtain  licenses
under patents or other proprietary  rights of third parties.  These licenses may
not be made  available on terms  acceptable to us, or at all. If we are required
to, and do not obtain any  required  licenses,  we could be prevented  from,  or
encounter  delays  in,  developing,  manufacturing  or  marketing  one  or  more
products.

         We also rely upon trade  secret  protection  for our  confidential  and
proprietary   information.   Others  may  independently   develop  substantially
equivalent  proprietary  information  and techniques or gain access to our trade
secrets or disclose our technology.  We may not be able to meaningfully  protect
our trade secrets which could limit our ability to exclusively produce products.

         We  require  our  employees,  consultants,  members  of the  scientific
advisory   board  and   parties   to   collaborative   agreements   to   execute
confidentiality  agreements  upon the  commencement  of employment or consulting
relationships  or a  collaboration  with us.  These  agreements  may not provide
meaningful  protection of our trade secrets or adequate remedies in the event of
unauthorized use or disclosure of confidential and proprietary information.

Because  we have  international  operations,  we will be  subject  to  risks  of
conducting business in foreign countries

         We have the right to manufacture, market and distribute our lead drugs,
clofarabine and Modrenal(R), in territories outside of the U.S. Specifically, we
currently market  Modrenal(R) in the United Kingdom and upon receiving  European
approval  for  clofarabine,  we  intend to market  the drug  throughout  Europe.
Further,  nearly half of our employees are employed by Bioenvision  Limited, our
wholly-owned subsidiary with offices in Edinburgh, Scotland.

         Because  we  have  international  operations  in  the  conduct  of  our
business,  we are  subject  to the  risks  of  conducting  business  in  foreign
countries, including:

o        difficulty in establishing or managing distribution relationships;

o        different standards for the development,  use,  packaging,  pricing and
         marketing of our products and technologies;

o        our  inability  to  locate   qualified   local   employees,   partners,
         distributors and suppliers;

o        the potential burden of complying with a variety of foreign laws, trade
         standards and  regulatory  requirements,  including  the  regulation of
         pharmaceutical products and treatment; and

o        general geopolitical risks, such as political and economic instability,
         changes in diplomatic and trade relations, and foreign currency risks.

         We do not engage in forward currency transactions which means we are
susceptible to fluctuations in the U.S. dollar against foreign currencies such
as the pound sterling. Accordingly, as the value of the dollar becomes weaker
against the pound sterling, ongoing services provided by our UK employees,
Cancer Research Organizations and other service providers become more expensive
to us. No assurance can be given that the U.S. dollar will not continue to
weaken which could have a material adverse effect on the costs associated with
our drug development activities.

We cannot  predict  our  future  capital  needs and we may not be able to secure
additional  financing  which  could  affect  our  ability  to operate as a going
concern

         As of June 30,  2004,  we had  stockholders'  equity  of  approximately
$27,383,000 and net working capital of approximately  $18,828,000.  However,  we
may need  additional  financing to continue to fund the research and development
and  marketing  programs for our  products and to generally  expand and grow our
business.  For example, we will need to employ a European sales force within the
next twelve months to capitalize on the commercial potential for clofarabine and
Modrenal(R)  if and to the  extent  our lead  drugs  are at  market in Europe by
mid-2005.  To the extent that we will be required to fund operating losses,  our
financial position would deteriorate.  There can be no assurance that we will be
able to find  significant  additional  financing at all or on terms favorable to
us. If equity securities are issued in connection with a financing,  dilution to
our  stockholders  would result,  and if additional funds are raised through the
incurrence  of debt, we may be subject to  restrictions  on our  operations  and
finances.  Furthermore,  if we do incur debt,  we may be limiting our ability to
repurchase capital stock,  engage in mergers,  consolidations,  acquisitions and
asset sales, or alter our lines of business or accounting  methods,  even though
these actions would otherwise benefit our business.  As of June 30, 2004, we had
stockholders'  equity of  approximately  $27,383,000  and net working capital of
approximately $18,828,000.


                                      -10-



         If adequate  financing is not  available,  we may be required to delay,
scale back or  eliminate  some of our  research  and  development  programs,  to
relinquish  rights to certain  technologies  or  products,  or to license  third
parties to  commercialize  technologies or products that we would otherwise seek
to develop.  Any inability to obtain additional  financing,  if required,  would
have a material  adverse  effect on our ability to continue our  operations  and
implement our business plan.

The prices we charge for our products and the level of third-party reimbursement
may decrease and our revenues could decrease

         Our ability to commercialize  products  successfully depends in part on
the price we may be able to charge for our  products  and on the extent to which
reimbursement  for the  cost  of our  products  and  related  treatment  will be
available from  government  health  administration  authorities,  private health
insurers and other third-party payors. We believe that Government  officials and
private  health  insurers  are  increasingly  challenging  the price of  medical
products  and  services.  Significant  uncertainty  exists  as  to  the  pricing
flexibility  which  distributors will have with respect to newly approved health
care products as well as the reimbursement  status for such approved  healthcare
products.

         Third-party  payors may attempt to control  costs  further by selecting
exclusive providers of their pharmaceutical products. If third-party payors were
to make this type of arrangement with one or more of our competitors, they would
not reimburse patients for purchasing our competing products.  For example, if a
third-party  payor in the U.K.  were to pay  patients  for regimens of aromatase
inhibitor  treatment  but not  treatments  of  Modrenal(R),  this would  cause a
decline in sales of Modrenal(R).  This lack of reimbursement  would diminish the
market for products  developed by us and would have a material adverse effect on
us.

Our products may be subject to recall

         Product  recalls may be issued at our discretion or by the FDA, the FTC
or other  government  agencies  having  regulatory  authority for product sales.
Product recalls,  if any in the future,  may harm our reputation and cause us to
lose development  opportunities,  or customers or pay refunds. Products may need
to be recalled due to disputed labeling claims,  manufacturing  issues,  quality
defects,  or other  reasons.  We do not carry any insurance to cover the risk of
potential  product  recall.  Any product  recall  could have a material  adverse
effect on us, our prospects, our financial condition and results of operations.

We may face  exposure  from  product  liability  claims  and  product  liability
insurance  may not be  sufficient  to cover  the costs of our  liability  claims
related to technologies or products

         We  face  exposure  to  product  liability  claims  if  the  use of our
technologies  or products or those we license  from third  parties is alleged to
have resulted in adverse  effects to users of such products.  Product  liability
claims may be brought by clinical trial participants,  although to date, no such
claims have been brought against us. If any such claims were brought against us,
the cost of defending such claims may adversely affect our business.  Regulatory
approval for commercial sale of our products does not mitigate product liability
risks.  Any  precautions  we take may not be  sufficient  to  avoid  significant
product  liability  exposure.  Although we have obtained  product  liability and
clinical trial insurance on our  technologies  and products at levels with which
management deems reasonable,  no assurance can be given that this insurance will
cover any  particular  claim or that we have  obtained an  appropriate  level of
liability  insurance  coverage  for our  development  activities.  We  currently
maintain three million dollars per year, claims made product liability insurance
coverage which we believe is adequate.  Existing coverage may not be adequate as
we further develop our products.  In the future,  adequate insurance coverage or
indemnification  by  collaborative  partners may not be available in  sufficient
amounts, or at acceptable costs, if at all. To the extent that product liability
insurance, if available, does not cover potential claims, we will be required to
self-insure the risks associated with those claims. The successful  assertion of
any  uninsured  product  liability  or other  claim  against us could  limit our
ability to sell our  products  or could cause  monetary  damages.  In  addition,
future product  labeling may include  disclosure of additional  adverse effects,
precautions and contra  indications,  which may adversely  impact product sales.
The pharmaceutical industry has experienced increasing difficulty in maintaining
product  liability  insurance  coverage at reasonable  levels,  and  substantial
increases in insurance  premium  costs,  in many cases,  have rendered  coverage
economically impractical.


The price of our  Common  Stock is likely to be  volatile  and  subject  to wide
fluctuations

         The market price of the securities of biotechnology  companies has been
especially volatile.  Thus, the market price of our Common Stock is likely to be
subject to wide  fluctuations.  For the twelve month  period  ended  October 22,
2004,  our  closing  stock  price has  ranged  from a high of $11.75 to a low of
$3.00.  If our revenues do not grow or grow more slowly than we anticipate,  or,
if  operating  or capital  expenditures  exceed our  expectations  and cannot be
adjusted  accordingly,  or if some other event adversely  affects us, the market
price of our  Common  Stock  could  decline.  In  addition,  if the  market  for
pharmaceutical  and  biotechnology   stocks  or  the  stock  market  in  general
experiences a loss in investor  confidence or otherwise  fails, the market price
of our Common Stock could fall for reasons unrelated to our business, results of
operations  and  financial  condition.  The market price of our stock also might
decline in reaction to events that affect other  companies in our industry  even
if these  events do not  directly  affect us. In the past,  companies  that have
experienced  volatility in the market price of their stock have been the subject
of securities class action litigation.


                                      -11-



If we were to become the subject of securities class action litigation, it could
result in  substantial  costs and a  diversion  of  management's  attention  and
resources.

Certain events could result in a dilution of holders of our Common Stock

         As of  October  22,  2004,  we had  28,797,170  shares of Common  Stock
outstanding,   3,275,000   shares  of  Series  A  Convertible   Preferred  Stock
outstanding  which are currently  convertible  into  6,550,000  shares of Common
Stock and common stock equivalents,  and warrants and stock options, convertible
or  exercisable  into  12,916,868  shares of our Common Stock.  The exercise and
conversion  prices of the common stock equivalents range from $0.74 to $8.25 per
share.  We have also  reserved for issuance an aggregate of 3,000,000  shares of
Common Stock for a stock option plan for our employees.  Historically, from time
to time, we have awarded our Common Stock to officers of the Company, in lieu of
cash  compensation,  although  we do not  expect to do so in the  future.  As of
October 22, 2004, (i) we have 37,750,699 shares of common stock registered under
the  Securities  Act and (ii) the sale of  shares  of  Common  Stock  underlying
4,500,000  options are  registered  under the  Securities  Act on Form S-8.  The
future resale of these shares and shares  underlying  stock options and warrants
will result in a dilution to your  percentage  ownership of our Common Stock and
could adversely affect the market price of our Common Stock.

         The  terms  of  our  Series  A  Convertible   Preferred  Stock  include
antidilution  protection  upon the occurrence of sales of our Common Stock below
certain   prices,   stock  splits,   redemptions,   mergers  and  other  similar
transactions.  If one or more of these events occurs the number of shares of our
Common Stock that may be acquired upon conversion or exercise would increase. If
converted  or  exercised,  these  securities  will  result in a dilution to your
percentage  ownership of our Common  Stock.  The resale of many of the shares of
Common Stock which underlie these options and warrants are registered under this
prospectus and the sale of such shares may adversely  affect the market price of
our Common Stock.


                           FORWARD LOOKING STATEMENTS

         Our disclosure and analysis in this prospectus, the applicable
prospectus supplement and the documents incorporated by reference into this
prospectus and the applicable prospectus supplement contain forward-looking
statements, which provide information regarding our current expectations, plans,
objectives and forecasts of future events. Words such as "may," "will,"
"believe," "estimate," "anticipate," "plan," "expect," "may affect," and
"intend", or statements concerning "potential" or "opportunity" and similar
expressions or the negative thereof, are intended to identify forward-looking
statements, but the absence of these words does not mean that a statement is not
forward-looking. Forward-looking statements include, without limitation:


o        statements about our drug development and  commercialization  goals and
         expectations;

o        potential regulatory approvals;

o        our plans  for and  anticipated  results  of our  clinical  development
         activities;

o        the potential advantage of our drug candidates;

o        statements about our future capital requirements, the sufficiency of
         our capital resources to meet those requirements and the expected
         composition of our capital resources; and

o        other statements that are not historical facts.

         Forward looking statements are based on the judgment of management at
the time the statements are made. Inaccurate assumptions and known and unknown
risks and uncertainties can affect the accuracy of forward-looking statements.
Our actual results could differ materially from those stated in or implied by
forward-looking statements for a number of reasons, including the risks
described in the sections of this prospectus and the applicable prospectus
entitled "Risk Factors," in our other public filings, press releases and
statements by our management. Other factors besides those described in this
prospectus, the applicable prospectus supplement and in our other public
filings, press releases and statements by our management could also affect
actual results.

         You should not unduly rely on these forward-looking statements, which
speak only as of the date of this prospectus or the applicable prospectus
supplement. We undertake no obligation to publicly update any forward-looking
statement to reflect new information, events or circumstances, whether
anticipated or unanticipated, or to conform the statement to actual results or
changes in our expectations. You should, however, review the factors, risks and
other information we provide in the reports we file from time to time with the
SEC.


                                      -12-



                                 USE OF PROCEEDS

         Unless otherwise indicated in the applicable prospectus supplement,  we
intend to use any net  proceeds  from the sale of Common  Stock  offered by this
prospectus for additional working capital and other general corporate  purposes,
including,  but not limited to,  further  development  of our lead  products and
increased sales and marketing  expenses related to the commercial  launch of our
products.  Until we have used the net proceeds, we may invest them in short-term
marketable securities.

                          DESCRIPTION OF CAPITAL STOCK

Description of Common Stock

         Number  of  Authorized  and  Outstanding  Shares.  Our  Certificate  of
Incorporation  authorizes  the issuance of  70,000,000  shares of common  stock,
$.001 par value per  share,  of which  28,797,170  shares  were  outstanding  on
October 22, 2004. All of the  outstanding  shares of common stock are fully paid
and non-assessable.

         Voting  Rights.  Holders of shares of common  stock are entitled to one
vote for each share on all matters to be voted on by the  stockholders.  Holders
of common stock have no cumulative voting rights. Accordingly,  the holders of a
simple  majority  of the  outstanding  common  stock  and  Series A  convertible
preferred stock, voting together as a class at a stockholders meeting at which a
quorum is present,  can elect all of the directors nominated for election at the
meeting.

         Other.  Holders of common stock have no  preemptive  rights to purchase
our common stock.  There are no conversion  rights or redemption or sinking fund
provisions with respect to the common stock.

         Transfer  Agent.  Shares of common stock are registered at the transfer
agent and are  transferable  at such  office by the  registered  holder (or duly
authorized  attorney) upon surrender of the common stock  certificate,  properly
endorsed.  No transfer  shall be registered  unless we are  satisfied  that such
transfer  will not  result in a  violation  of any  applicable  federal or state
securities  laws.  The transfer  agent for our common stock is Liberty  Transfer
Company, 274B New York Avenue, Huntington, New York 11743.

Description of Preferred Stock

         Number  of  Authorized   Shares.   Our  certificate  of   incorporation
authorizes the issuance of up to 20,000,000 shares of preferred stock, par value
$.001 per share, in one or more series with such limitations and restrictions as
may be  determined in the sole  discretion  of our board of  directors,  with no
further  authorization  by  stockholders  required for the creation and issuance
thereof.

         We have designated  5,920,000 shares of our preferred stock as Series A
convertible   preferred  stock,  of  which  3,275,000  shares  were  issued  and
outstanding  as of October 22,  2004.  The  holders of the Series A  convertible
preferred stock vote as a single class with the common stock, on an as-converted
basis, on all matters upon which the holders of the common stock are entitled to
vote.  Each  outstanding  share of  Series A  convertible  preferred  stock  may
currently be converted into two shares of common stock, at the conversion  price
of $1.50 per share. The shares of Series A convertible  preferred stock shall be
automatically convertible into shares of common stock if the market price of the
common  stock  after one year from the date of issuance is $10.00 or more for 30
consecutive  trading days and the trading  volume is at least 150,000 shares per
trading day during such 30-day period. Holders of Series A convertible preferred
stock have a  liquidation  preference  over holders of common stock of $3.00 per
share.  Holders of the Series A convertible  preferred  stock are entitled to an
annual  5%  dividend  which may be paid in cash or  additional  shares of common
stock in our sole discretion.

         Our charter  also  authorizes  our board of  directors  to increase the
number of shares of  preferred  stock we may issue  without  approval  of common
stockholders.  Preferred stock may be issued in one or more series, the terms of
which may be determined  without  further action by common  stockholders.  These
terms may  include  preferences,  conversion  or other  rights,  voting  powers,
restrictions, limitations as to dividends, qualifications or terms or conditions
of redemption.  The issuance of any preferred stock could  materially  adversely
affect the rights of holders of our common stock, and therefore could reduce its
value. In addition, specific rights granted to future holders of preferred stock
could be used to restrict our ability to merge with,  or sell assets to, a third
party.  The power of the board of directors to issue  preferred stock could make
it more difficult, delay, discourage,  prevent or make it more costly to acquire
or effect a change in control,  thereby  preserving  the  current  stockholders'
control.


                                      -13-



         Delaware Law and Certain By-Law Provisions

         Certain  provisions of our by-laws are intended to strengthen our board
of directors' position in the event of a hostile takeover attempt.  These by-law
provisions have the following effects:

         o        they provide that only business brought before the annual
                  meeting by our board of directors or by a stockholder who
                  complies with the procedures set forth in the by-laws may be
                  transacted at an annual meeting of stockholders; and

         o        they establish a procedure for our board of directors to fix
                  the record date whenever stockholder action by written consent
                  is undertaken.


         Furthermore, our Company is subject to the provisions of Section 203 of
the Delaware General Corporation Law, an anti-takeover law. In general, the
statute prohibits a publicly held Delaware corporation from engaging in a
"business combination" with an "interested stockholder" for a period of three
years after the date of the transaction in which the person became an interested
stockholder, unless the business combination is approved in a prescribed manner.
For purposes of Section 203, a "business combination" includes a merger, asset
sale or other transaction resulting in a financial benefit to the interested
stockholder, and an "interested stockholder" is a person who, together with
affiliates and associates, owns, or within three years prior, did own, 15% or
more of the corporation's voting stock.

                              PLAN OF DISTRIBUTION

         We may sell our securities from time to time by any method permitted by
the Securities Act of 1933, including in the following ways:

         o        through one or more  underwriters on a firm commitment or best
                  efforts basis;

         o        directly to one or more purchasers;

         o        through agents;

         o        through  broker-dealers,  who may act as agents or principals,
                  including a block trade in which a broker or dealer so engaged
                  will attempt to sell the  securities as agent but may position
                  and resell a portion of the block as principal  to  facilitate
                  the transaction;

         o        in privately negotiated transactions; and

         o        in any combination of these methods of sale.


         The applicable prospectus supplement will set forth:

         o        the  specific  terms  of  the  offering  of  our   securities,
                  including  the name or names of any  underwriters,  dealers or
                  agents;

         o        the purchase  price of the  securities  and the proceeds to us
                  from the sale;

         o        any underwriting  discounts and commissions or agency fees and
                  other   items    constituting    underwriters'    or   agents'
                  compensation;

         o        the initial  offering price to the public and any discounts or
                  concessions allowed or reallowed or paid to dealers; and

         o        the name of any  securities  exchange on which the  securities
                  may be listed.


         Any  public  offering  price,   discounts  or  concessions  allowed  or
reallowed or paid to dealers may be changed from time to time.


         We  expect  that  any  common  stock  sold  pursuant  to  a  prospectus
supplement will be listed on the Nasdaq National Market.


                                      -14-



         The distribution of the securities may be effected from time to time in
one or more transactions at a fixed price or prices (which may be changed), at
market prices prevailing at the time of sale, at prices related to the
prevailing market prices or at negotiated prices.


         Offers to purchase our securities may be solicited by agents designated
by us from time to time. Broker-dealers or agents may receive compensation in
the form of commissions, discounts or concessions from us. Broker-dealers or
agents may also receive compensation from the purchasers of the securities for
whom they sell as principals. Each particular broker-dealer will receive
compensation in amounts negotiated in connection with the sale, which might be
in excess of customary commissions. Broker-dealers or agents and any other
participating broker-dealers participating in the distribution of our securities
may be deemed to be underwriters, and any discounts and commissions received by
them and any profit realized by them on resale of the securities may be deemed
to be underwriting discounts and commissions.


         If required under applicable state securities laws, we will sell the
securities only through registered or licensed brokers or dealers. In addition,
in some states, we may not sell securities unless they have been registered or
qualified for sale in the applicable state or an exemption from the registration
or qualification requirement is available and complied with.


         If the securities are sold by means of an underwritten offering, we
will execute an underwriting agreement with an underwriter or underwriters, and
the names of the specific managing underwriter or underwriters, as well as any
other underwriters, and the terms of the transaction, including commissions,
discounts and any other compensation of the underwriters and dealers, if any,
will be set forth in the applicable prospectus supplement, which will be used by
the underwriters to make resales of the securities. Under agreements into which
we may enter, underwriters, dealers and agents who participate in the
distribution of the securities may be entitled to indemnification by us against
some liabilities, including liabilities under the Securities Act.


         If we use underwriters for an offering of securities, the underwriters
may acquire the securities for their own accounts. The underwriters may resell
the securities from time to time in one or more transactions at a fixed price or
prices, which may be changed, at varying prices determined by the underwriters
at the time of sale, or at negotiated prices. We also may, from time to time,
authorize underwriters acting as our agents to offer and sell the securities
upon the terms and conditions as will be set forth in the applicable prospectus
supplement. In connection with the sale of the securities, underwriters may be
deemed to have received compensation from us in the form of underwriting
discounts or commissions and also may receive commissions from purchasers of the
securities. Underwriters may sell the securities to or through dealers, who may
receive compensation in the form of discounts, concessions from the underwriters
and/or commissions from the purchasers of the securities.


         Any underwriting compensation paid by us to underwriters or agents in
connection with any offering of the securities and any discounts, concessions or
commissions allowed by underwriters to participating dealers will be set forth
in the applicable prospectus supplement. Underwriters, dealers and agents
participating in the distribution of our securities may be deemed to be
underwriters, and any discounts and commissions received by them and any profit
realized by them on resale of the securities may be deemed to be underwriting
discounts and commissions.


         If so indicated in the applicable prospectus supplement, we may
authorize underwriters, dealers or agents to solicit offers from certain types
of institutions to purchase securities from us at the public offering price set
forth in the applicable prospectus supplement pursuant to delayed delivery
contracts providing for payment and delivery on a future date. Institutions with
which delayed delivery contracts may be made include commercial and savings
banks, insurance companies, pension funds, investment companies, educational and
charitable institutions, and other institutions. The applicable prospectus
supplement will set forth the commission payable for solicitation of such
offers.


         Our securities may be offered to the public either through underwriting
syndicates represented by managing underwriters or directly by the managing
underwriters. If any underwriters are utilized in the sale of the securities,
the underwriting agreement will provide that the obligations of the underwriters
are subject to specified conditions precedent. If we sell our securities to one
or more underwriters on a firm commitment basis, then the underwriters will be
obligated to purchase all of the securities offered if any are purchased.


         We may grant to the underwriters options to purchase additional
securities to cover over-allotments, if any, at the public offering price with
additional underwriting discounts or commissions, as may be set forth in the
applicable prospectus supplement. If we grant any over-allotment option, the
terms of the over-allotment option will be set forth in the applicable
prospectus supplement.


         In connection with any offering, persons participating in the offering,
such as any underwriters, may purchase and sell the securities in the open
market. These transactions may include over-allotment and stabilizing
transactions and purchases to cover syndicate short positions created in
connection with the offering. Stabilizing transactions consist of bids or
purchases for the purpose of preventing or retarding a decline in the market
price of the securities and syndicate short positions involve the sale by
underwriters of a greater number of securities than they are required to
purchase from us in the offering. Underwriters also may impose a penalty bid,
whereby selling concessions allowed to syndicate members or other broker-dealers
in respect of the securities sold in the offering


                                      -15-



for their account may be reclaimed by the syndicate if the securities are
repurchased by the syndicate in stabilizing or covering transactions. These
activities may stabilize, maintain or otherwise affect the market price of the
securities, which may be higher than the price that might prevail in the open
market, and these activities, if commenced, may be discontinued at any time.


         Any underwriters, dealers or agents involved in any distribution or
sale of our securities may be customers of, engage in transactions with or
perform services for us from time to time.


         We will bear all costs, expenses and fees in connection with the
registration of the securities as well as the expense of all commissions and
discounts, if any, attributable to the sales of the securities by us.


                                  LEGAL MATTERS

         Unless otherwise indicated in the applicable prospectus supplement, the
validity  of the shares of common  stock  offered by this  prospectus  and other
legal matters  relating to this  offering  will be passed on by Paul,  Hastings,
Janofsky & Walker LLP, New York, New York.

                                     EXPERTS

         Our  auditors  are  Grant  Thornton  LLP.  Our  consolidated  financial
statements  as at and for the  years  ended  June 30,  2004  and  June 30,  2003
included  in our annual  report on Form  10-KSB for the year ended June 30, 2004
and incorporated by reference herein, have been incorporated by reference herein
in reliance upon the report of Grant Thornton LLP, independent registered public
accountants,  given on the authority of said firm as experts in  accounting  and
auditing.

                       WHERE YOU CAN FIND MORE INFORMATION

         We file annual, quarterly and special reports, proxy statements and
other information with the SEC. You may read and copy any materials we have
filed with the SEC at the SEC's public reference rooms. The SEC also maintains a
web site (http://www.sec.gov) that contains reports, proxy statements and other
information concerning us. Please call the SEC at 1-800-SEC-0330 for information
concerning the operations of the public reference rooms or visit the SEC at the
following locations:


             Public Reference Room       Midwest Regional Office
             450 Fifth Street, N.W.      Citicorp Center
             Room 1024                   500 West Madison Street
             Washington, D.C. 20549      Suite 1400
                                         Chicago, Illinois 60661-2511


         We have filed with the SEC a registration statement on Form S-3 under
the Securities Act to register the securities to be sold in this offering. This
prospectus, which is part of the registration statement, does not contain all of
the information set forth in the registration statement or the exhibits and
schedules to the registration statement. For further information regarding
Bioenvision and our securities, please refer to the registration statement and
the documents filed as exhibits to the registration statement.

                           INCORPORATION BY REFERENCE

         The SEC allows us to "incorporate by reference" the information we file
with it, which means that we can disclose important information to you by
referring you to those filed documents. The information incorporated by
reference is considered to be part of this prospectus, and information that we
file later with the SEC will automatically update and supersede this
information.

         The following documents, which have been filed with the SEC, are hereby
incorporated by reference:

         o          Our definitive proxy statement dated October ___, 2004,
         relating to our December 2004 annual meeting of stockholders, and

         o          Our annual report on Form 10-KSB for the year ended June 30,
         2004 filed on September 24, 2004 (File No. 001-31787);

         All other reports and documents subsequently filed by us with the SEC
pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act
after the date of this prospectus and prior to the termination of the offering
are deemed incorporated by reference into this prospectus and a part hereof from
the date of filing of those documents. Any statement contained in any document
incorporated by reference shall be deemed to be modified or superseded for the
purposes of this prospectus to the extent that a


                                      -16-



statement contained in a later document modifies or supersedes such statement.
Any statements so modified or superseded shall not be deemed to constitute a
part of this prospectus, except as modified or superseded.

         We will provide without charge to each person, including any beneficial
owner, to whom this prospectus is delivered, upon written or oral request of
such person, a copy of any or all of the documents referred to above which have
been or may be incorporated by reference into this prospectus (other than the
exhibits to such documents). Requests for such documents should be directed to
Bioenvision Inc., 509 Madison Avenue, Suite 404, New York, New York 10022,
Attention: David P. Luci (telephone: (212) 750-6700).

         We have not authorized any dealer, salesperson or other person to give
any information or represent anything not contained in this prospectus. You
should not rely on any unauthorized information. This prospectus does not offer
to sell or solicit an offer to buy any shares in any jurisdiction in which it is
unlawful. The information in this prospectus is current as of the date on the
cover.


            DISCLOSURE OF COMMISSION POSITION ON INDEMNIFICATION FOR
                           SECURITIES ACT LIABILITIES

         Our bylaws  provide that directors and officers shall be indemnified by
us to the fullest extent  authorized by the Delaware  General  Corporation  Law,
against all expenses and  liabilities  reasonably  incurred in  connection  with
services for us or on our behalf.

         Insofar as indemnification for liabilities arising under the Securities
Act might be permitted to directors, officers or persons controlling our company
under the provisions  described above, we have been informed that in the opinion
of the Securities and Exchange Commission such indemnification is against public
policy as expressed in the Securities Act and is therefore unenforceable.


                                      -17-



                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution.

The following sets forth the estimated  expenses  payable in connection with the
preparation and filing of this Registration:

*Printing and Engraving Expenses...............................        15,000
*Accounting Fees and Expenses..................................        15,000
*Legal Fees and Expenses.......................................        50,000
*Blue Sky Fees and Expenses....................................         2,000
*Transfer Agent's and Registrar's Fees and Expenses............         1,000
*Miscellaneous.................................................        17,000
                                                                       ------

           *Total..............................................      $100,000
           ======                                                    ========

*  Estimated.

Item 15. Indemnification of Directors and Officers.

         The  indemnification  of officers and  directors of the  Registrant  is
governed by Section 145 of the General  Corporation Law of the State of Delaware
(the "DGCL") and the Certificate of  Incorporation,  as amended,  and By-Laws of
the  Registrant.  Subsection  (a) of DGCL Section 145 empowers a corporation  to
indemnify  any person who was or is a party or is  threatened to be made a party
to any  threatened,  pending or completed  action,  suit or proceeding,  whether
civil, criminal,  administrative or investigative (other than an action by or in
the right of the  corporation) by reason of the fact that the person is or was a
director, officer, employee or agent of the corporation, or is or was serving at
the  request of the  corporation  as a director,  officer,  employee or agent of
another  corporation,  partnership,  joint venture,  trust or other  enterprise,
against expenses (including attorneys' fees), judgments,  fines and amounts paid
in settlement  actually and reasonably incurred by the person in connection with
such  action,  suit or  proceeding  if the person acted in good faith and in the
manner  the  person  reasonably  believed  to be in or not  opposed  to the best
interests  of the  corporation,  and,  with  respect to any  criminal  action or
proceeding,  had no  reasonable  cause  to  believe  the  person's  conduct  was
unlawful.

         Subsection  (b) of DGCL Section 145 empowers a corporation to indemnify
any  person  who was or is a party  or is  threatened  to be made a party to any
threatened,  pending  or  completed  action  or suit by or in the  right  of the
corporation  to procure a  judgment  in its favor by reason of the fact that the
person is or was a director,  officer, employee or agent of the corporation,  or
is or was serving at the  request of the  corporation  as a  director,  officer,
employee or agent of another corporation,  partnership,  joint venture, trust or
other  enterprise  against  expenses  (including  attorneys'  fees) actually and
reasonably incurred by the person in a connection with the defense or settlement
of such  action or suit if the person  acted in good faith and in the manner the
person reasonably  believed to be in or not opposed to the best interests of the
corporation and except that no  indemnification  shall be made in respect of any
claim,  issue or matter as to which such person  shall have been  adjudged to be
liable to the corporation  unless and only to the extent that the Delaware Court
of  Chancery  or the  court in which  such  action  or suit  was  brought  shall
determine upon  application  that,  despite the adjudication of liability but in
view of all the  circumstances of the case, such person is fairly and reasonably
entitled  to  indemnity  for such  expenses  which the Court of Chancery or such
other court shall deem proper.

         DGCL Section 145 further  provides that to the extent that to a present
or former director or officer is successful,  on the merits or otherwise, in the
defense of any action, suit or proceeding referred to in subsections (a) and (b)
of Section 145, or in defense of any claim, issue or matter therein, such person
shall be indemnified against expenses  (including  attorneys' fees) actually and
reasonably  incurred by such  person in  connection  therewith.  In all cases in
which  indemnification  is permitted under subsection (a) and (b) of Section 145
(unless  ordered  by a  court),  it  shall  be made by the  corporation  only as
authorized in the specific case upon a determination that indemnification of the
present  or  former  director,  officer,  employee  or  agent is  proper  in the
circumstances  because  the  applicable  standard of conduct has been met by the
party to be  indemnified.  Such  determination  must be made,  with respect to a
person who is a director or officer at the time of such determination,  (1) by a
majority  vote of the  directors  who are no  parties  to such  action,  suit or
proceeding,  even  though  less than a  quorum,  or (2) by a  committee  of such
directors designated by majority vote of such directors, even though less than a
quorum,  or (3) if there are no such directors,  or if such directors so direct,
by independent  legal counsel in a written opinion,  or (4) by the stockholders.
The statute authorizes the corporation to pay expenses incurred by an officer or
director in advance of the final  disposition of a proceeding upon receipt of an
undertaking  by or on behalf of the person to whom the advance will be made,  to
repay the advances if it shall ultimately be determined that he was not entitled
to  indemnification.  DGCL Section 145 also  provides that  indemnification  and
advancement  of expenses  permitted  thereunder  are not to be  exclusive of any
other rights to which those seeking  indemnification  or advancement of expenses
may  be  entitled  under  any  By-law,   agreement,   vote  of  stockholders  or
disinterested  directors,  or otherwise.  DGCL Section 145 also  authorizes  the
corporation to purchase and maintain


                                      II-1



liability insurance on behalf of its directors, officers, employees and agents
regardless of whether the corporation would have the statutory power to
indemnify such persons against the liabilities insures.

         Article Seventh of the Certificate of  Incorporation of the Registrant,
as amended  (the  "Certificate"),  provides  that no director of the  Registrant
shall be personally  liable to the Registrant or its  stockholders  for monetary
damages for breach of fiduciary duty as a director  except for liability (i) for
any  breach  of  the  director's  duty  of  loyalty  to  the  Registrant  or its
stockholders,  (ii) for acts or  omissions  not in good  faith or which  involve
intentional misconduct or a knowing violation of law, (iii) under Section 174 of
the  DGCL  (involving   certain   unlawful   dividends  or  stock  purchases  or
redemptions),  or (iv) for any  transaction  from which the director  derived an
improper personal benefit.

         Pursuant to Section 145(g) of the DGCL, the  Registrant's  By-Laws,  as
amended,  authorize the Registrant to obtain  insurance to protect  officers and
directors  from certain  liabilities,  including  liabilities  against which the
Registration cannot indemnify its officers and directors.

         In derivative actions,  Bioenvision may only protect from liability its
officers,  directors,   employees  and  agents  against  expenses  actually  and
reasonably  incurred in connection with the defense or settlement of a suit, and
only if they acted in good faith and in a manner they reasonably  believed to be
in, or not opposed to, the best interests of the corporation. Indemnification is
not  permitted  in the event that the  director,  officer,  employee or agent is
actually adjudged liable to Bioenvision unless, and only to the extent that, the
court in which the action was brought so determines.

         Bioenvision's Certificate of Incorporation permits it to protect from
liability its directors except in the event of: (1) any breach of the director's
duty of loyalty to Bioenvision or its stockholders; (2) any act or failure to
act that is not in good faith or involves intentional misconduct or a knowing
violation of the law; (3) liability arising under Section 174 of the Delaware
General Corporation Law, relating to unlawful stock purchases, redemptions, or
payment of dividends; or (4) any transaction in which the director received an
improper personal benefit.

Item 16. Exhibits

      Exhibit
      Number                  Description
      ---------               --------------
          5.1*       Opinion of Paul, Hastings, Janofsky & Walker, LLP

          23.1       Consent of Grant Thornton LLP

         23.2*       Consent of Paul, Hastings, Janofsky & Walker LLP (included
                     in Exhibit 5.1)

          24.1       Power of Attorney (appears on signature page)

      * To be filed by amendment.

Item 17. Undertakings.

         (a)      The undersigned registrant hereby undertakes:

                  (1)      To file, during any period in which offers or sales
                  are being made, a post-effective amendment to this
                  registration statement:

                           (i) To include any prospectus required by section
                           10(a)(3) of the Securities Act of 1933.

                           (ii) To reflect in the prospectus any facts or events
                           arising after the effective date of the registration
                           statement (or the most recent post-effective
                           amendment thereof) which, individually or in the
                           aggregate, represent a fundamental change in the
                           information set forth in the registration statement.
                           Notwithstanding the foregoing, any increase or
                           decrease in volume of securities offered (if the
                           total dollar value of securities offered would not
                           exceed that which was registered) and any deviation
                           from the low or high end of the estimated maximum
                           offering range may be reflected in the form of
                           prospectus filed with the Commission pursuant to Rule
                           424(b), if, in the aggregate, the changes in volume
                           and price represent no more than a 20% change in the
                           maximum aggregate offering price set forth in the
                           "Calculation of Registration Fee" table in the
                           effective registration statement.


                                      II-2



                           (iii) To include any material information with
                           respect to the plan of distribution not previously
                           disclosed in the registration statement or any
                           material change to such information in the
                           registration statement.

                                    Provided, however, that paragraphs (a)(1)(i)
                                    and (a)(1)(ii) do not apply if the
                                    registration statement is on Form S-3, Form
                                    S-8, or Form F-3, and the information
                                    required to be included in a post-effective
                                    amendment by those paragraphs is contained
                                    in periodic reports filed by the registrant
                                    pursuant to Section 13 or Section 15(d) of
                                    the Securities Exchange Act of 1934 that are
                                    incorporated by reference in the
                                    registration statement.

                  (2) That, for the purpose of determining any liability under
                  the Securities Act of 1933, each such post-effective amendment
                  shall be deemed to be a new registration statement relating to
                  the securities offered therein, and the offering of such
                  securities at that time shall be deemed to be the initial bona
                  fide offering thereof.

                  (3) To remove from registration by means of a post-effective
                  amendment any of the securities being registered which remain
                  unsold at the termination of the offering.

         (b)      The undersigned registrant hereby undertakes that, for
                  purposes of determining any liability under the Securities Act
                  of 1933, each filing of the registrant's annual report
                  pursuant to Section 13(a) or Section 15(d) of the Securities
                  Exchange Act of 1934 (and, where applicable, each filing of an
                  employee benefit plan's annual report pursuant to Section
                  15(d) of the Securities Exchange Act of 1934) that is
                  incorporated by reference in the registration statement shall
                  be deemed to be a new registration statement relating to the
                  securities offered therein, and the offering of such
                  securities at that time shall be deemed to be the initial bona
                  fide offering thereof.

         (c)      Insofar as indemnification for liabilities arising under the
                  Securities Act of 1933 may be permitted to directors, officers
                  and controlling persons of the registrant pursuant to the
                  foregoing provisions, or otherwise, the registrant has been
                  advised that in the opinion of the Securities and Exchange
                  Commission such indemnification is against such public policy
                  as expressed in the Act and is, therefore, unenforceable. In
                  the event that a claim for indemnification against such
                  liabilities (other than the payment by the registrant of
                  expenses incurred or paid by a director, officer or
                  controlling person of the registrant in the successful defense
                  of any action, suit or proceeding) is asserted by such
                  director, officer or controlling person in connection with the
                  securities being registered, the registrant will, unless in
                  the opinion of its counsel the matter has been settled by
                  controlling precedent, submit to a court of appropriate
                  jurisdiction the question whether such indemnification by it
                  is against public policy as expressed in the Act and will be
                  governed by the final adjudication of such issue.


                                      II-3



                                   SIGNATURES

         Pursuant  to the  requirements  of the  Securities  Act  of  1933,  the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-3 and has duly caused this Registration
Statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized,  in the  City of New  York,  State of New  York,  on the 25th day of
October, 2004.

                                BIOENVISION, INC.

                           By /s/ Christopher B. Wood
                           --------------------------
                           Christopher B. Wood, Chairman of the
                           Board and Chief Executive Officer


         KNOW ALL MEN BY THESE PRESENT, that each person whose signature appears
below  constitutes  and  appoints  Christopher  B.  Wood as his true and  lawful
attorney-in-fact  and agent, with full power of substitution and  resubstitution
for him/ and in his name,  place and stead, in any and all  capacities,  to sign
any  and all  amendments  and  post-effective  amendments  to this  registration
statement,  and make such changes and additions to this  registration  statement
for the same offering that may be filed under Rule 462(b), and to file the same,
with all exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, granting unto the attorney-in-fact and agent
full  power  and  authority  to do and  perform  each and  every  act and  thing
requisite  and  necessary  to be done and  about the  premises,  as fully to all
intents and  purposes as he/she might or could do in person,  thereby  ratifying
and confirming all that the  attorney-in-fact and agent, or his/her substitutes,
may lawfully do or cause to be done by virtue thereof and the registrant  hereby
confers like authority on its behalf.

In  accordance  with  the  requirements  of the  Securities  Act of  1933,  this
registration  statement  has  been  signed  by  the  following  persons  in  the
capacities and on the dates indicated.





Signature                                                    Title                                  Date
---------                                                    -----                                  ----
                                                                                       


/s/ Christopher B. Wood, M.D.                   Chairman and Chief Executive Officer and     October 25, 2004
-----------------------------                   Director
Christopher B. Wood                             (Principal Executive Officer)

/s/ David P. Luci                               Chief Financial Officer, General Counsel     October 25, 2004
-----------------                               (Principal Financial and Accounting
David P. Luci                                   Officer)

/s/ Thomas S. Nelson, C.A.                      Director                                     October 25, 2004
-------------------------
Thomas S. Nelson, C.A.

/s/ Michael Kauffman                            Director                                     October 25, 2004
--------------------
Michael Kauffman

/s/ Andrew N. Schiff                            Director                                     October 25, 2004
--------------------
Andrew N. Schiff

/s/ Steven A. Elms                              Director                                     October 25, 2004
------------------
Steven A. Elms



                                      II-4



                                  EXHIBIT INDEX


Exhibit
Number                                       Description
---------                                    --------------
    5.1*             Opinion of Paul, Hastings, Janofsky & Walker, LLP

    23.1             Consent of Grant Thornton LLP

   23.2*             Consent of Paul, Hastings, Janofsky & Walker LLP (included
                     in Exhibit 5.1)

    24.1             Power of Attorney (appears on signature page)

* To be filed by amendment.


                                      II-5