CELGENE CORP /DE/
424B4, 2000-02-11
COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH
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                                                FILED PURSUANT TO RULE 424(b)(4)
                                                      REGISTRATION NO. 333-94915

PROSPECTUS





3,000,000 Shares


[GRAPHIC OMITTED]



CELGENE CORPORATION

Common Stock


Celgene  Corporation  is  selling  2,484,000  shares  of  common  stock  in this
offering and the selling stockholders are selling 516,000 shares.


Our  common  stock  is  traded  on  the  Nasdaq National Market under the symbol
"CELG."  On  February 10, 2000, the reported last sale price of our common stock
was $103 per share.


INVESTING  IN  OUR  COMMON STOCK INVOLVES RISKS. SEE "RISK FACTORS" BEGINNING ON
PAGE 8.


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.




<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------
                                PRICE TO         UNDERWRITING      PROCEEDS TO      PROCEEDS TO THE
                                PUBLIC           DISCOUNTS         CELGENE          SELLING STOCKHOLDERS
<S>                             <C>              <C>               <C>              <C>
- ---------------------------------------------------------------------------------------------------------

Per Share                        $     101.00     $      6.06       $      94.94     $     94.94
- ---------------------------------------------------------------------------------------------------------

Total                            $303,000,000     $18,180,000       $235,830,960     $48,989,040
- ---------------------------------------------------------------------------------------------------------

</TABLE>

We  have  granted  the  underwriters  the  right to purchase up to an additional
450,000 shares of our common stock to cover over-allotments.




                              Joint Lead Managers


J.P. MORGAN & CO.                                PRUDENTIAL VECTOR HEALTHCARE
                                                A UNIT OF PRUDENTIAL SECURITIES



                           U.S. BANCORP PIPER JAFFRAY





February 10, 2000

<PAGE>

      [BAR GRAPH INDICATING THE PRECLINICAL AND CLINICAL STATUS OF CELGENE
        CORPORATION'S CANCER, IMMUNOLOGY AND CHIRAL CHEMISTRY PROGRAMS.]

<PAGE>

You  should  rely  only on the information contained in this prospectus. We have
not  authorized  anyone  to  provide  you  with  information different from that
contained  in  this  prospectus.  We are offering to sell, and seeking offers to
buy,  shares  of  common  stock only in jurisdictions where offers and sales are
permitted.  The  information contained in this prospectus is accurate only as of
the  date  of  this  prospectus,  regardless  of  the  time  of delivery of this
prospectus or of any sale of our common stock.


                               TABLE OF CONTENTS




<TABLE>
<CAPTION>
                                                        PAGE
                                                       -----
<S>                                                    <C>
Prospectus Summary .................................      2
Risk Factors .......................................      8
Forward-Looking Statements .........................     13
Use of Proceeds ....................................     14
Price Range of Common Stock ........................     14
Dividend Policy ....................................     14
Capitalization .....................................     15
Selected Consolidated Financial Data ...............     16
Management's Discussion and Analysis
   of Financial Condition and Results of
   Operations ......................................     17


</TABLE>
<TABLE>
<CAPTION>
                                                        PAGE
                                                       -----
<S>                                                    <C>
Business ...........................................     21
Management .........................................     34
Selling Stockholders ...............................     37
Description of Capital Stock .......................     38
Shares Eligible for Future Sale ....................     40
Underwriting .......................................     41
Legal Matters ......................................     43
Experts ............................................     43
Where You Can Find More Information ................     43
Index to Consolidated Financial Statements .........    F-1
</TABLE>

                                ---------------
We own or have the right to various  trademarks,  service  marks and trade names
used  in  our  business.   These  include   THALOMID(Reg.   TM)   (thalidomide),
S.T.E.P.S.(TM),   IMiDs(TM),  SelCIDs(TM),  ATTENADE(TM)  and  Celgro(TM).  This
prospectus  also  includes  trademarks,  service  marks and trade names owned by
other companies.


                                       1
<PAGE>

                              PROSPECTUS SUMMARY

This  summary  highlights  information  contained  elsewhere in this prospectus.
This  summary  does  not contain all of the information that you should consider
before  deciding  to invest in our common stock. We urge you to read this entire
prospectus  carefully,  including  the  information  under  "Risk  Factors," the
consolidated financial statements and the related notes to those statements.




                              CELGENE CORPORATION

We  are an  independent  biopharmaceutical  company  engaged  in the  discovery,
development  and  commercialization  of  novel  human  pharmaceuticals  for  the
treatment of cancer and immunological diseases. Our primary therapeutic focus is
on the development of orally administered,  small molecule  pharmaceuticals that
regulate tumor necrosis  factor alpha, or TNF(alpha),  and are  anti-angiogenic.
TNF(alpha)   has  been  linked  to  the  cause  and  symptoms  of  many  chronic
inflammatory  and  immunological  diseases.  Anti-angiogenic  drugs  inhibit the
growth of undesirable blood vessels, including those that promote tumor growth.

Our  lead  product,  THALOMID (thalidomide), was approved for sale in the United
States  by  the  U.S.  Food  and  Drug Administration, or FDA, on July 16, 1998.
THALOMID  is approved for the treatment of erythema nodosum leprosum, or ENL, an
inflammatory  complication of leprosy. During the first nine months of 1999, net
sales  of  THALOMID  were  $15.1  million,  primarily  for  cancer, or oncology,
indications.  Our 60 person sales and commercialization group sells this product
in  the  United  States.  Our  regulatory  and  clinical  strategy  is to obtain
approvals   for   THALOMID  for  additional  cancer  and  immunological  disease
indications.  THALOMID  is currently being evaluated in over 100 clinical trials
for  the  treatment  of  certain  blood  and  solid  tumor  cancers  as  well as
immunological  disorders  such  as  Crohn's disease. Several of these trials are
supported  by  the  National Cancer Institute, or the NCI. Working with the FDA,
we  have developed a novel comprehensive education and distribution program, the
"System  for  Thalidomide Education and Prescribing Safety," or S.T.E.P.S., that
is designed to support the safe and appropriate use of THALOMID.

Our cancer and immunology  pharmaceutical pipeline is highlighted by two classes
of novel and proprietary oral  therapeutic  agents,  IMiDs, or  ImmunoModulatory
Drugs, and SelCIDs,  or Selective  Cytokine  Inhibitory  Drugs. Both classes are
being developed for the treatment of cancer, chronic inflammatory diseases, such
as inflammatory  bowel disease and rheumatoid  arthritis,  and other diseases of
the immune  system.  Our IMiDs are  thalidomide  analogues  that are designed to
modulate  TNF(alpha) and inhibit  angiogenesis  without causing birth defects or
sedation.  We have  completed  a Phase I safety  trial  for each of our two lead
IMiDs.  Our SelCIDs have been found in research to be  Phosphodiesterase  type 4
inhibitors, or PDE 4 inhibitors. Our SelCIDs have not, to date, shown any of the
undesirable side effects, such as nausea or vomiting,  often associated with PDE
4 inhibitors.  Our lead SelCID was found to be well  tolerated and did not cause
nausea or vomiting in two Phase I clinical trials and is currently in a Phase II
pilot trial to assess its potential for the treatment of Crohn's disease. We own
patents that cover these compounds and their therapeutic applications.

We  also  have  a  chiral  chemistry program in which we develop chemically pure
versions  of  existing compounds. We recently announced the results of two Phase
III  pivotal  efficacy trials of ATTENADE for the treatment of Attention Deficit
Disorder,  or  ADD,  and  Attention  Deficit  Hyperactivity  Disorder,  or ADHD.
ATTENADE  is  a  chirally pure version of dl-methylphenidate. dl-methylphenidate
is  a generic drug that is currently sold under the trade name Ritalin. In these
trials,  ATTENADE  showed  a  statistically  significant  benefit in controlling
symptoms  of  ADD  and  ADHD and demonstrated a statistically significant longer
duration  of behavior control versus dl-methylphenidate. We expect to file a New
Drug  Application, or NDA, for ATTENADE with the FDA in the second half of 2000.
We  hold  six  U.S.  patents  covering use and formulations of and manufacturing
processes  for  ATTENADE.  Total  U.S.  sales in 1998 of drugs used to treat the
symptoms of ADD and ADHD were approximately $500 million.

We  own  or control exclusive worldwide development and marketing rights for all
of  our  current  products  and products under development, except for rights in
Canada  with  respect  to  ATTENADE. Our strategy is to sell and market products
that   we   develop  for  cancer  and  immunological  disease  indications  with
accessible  patient populations. In the United States, we plan to implement this
strategy through our sales and commercialization group, which we expect to


                                       2
<PAGE>

continue   to   expand.   We   anticipate  selectively  partnering  with  larger
pharmaceutical   companies   with   respect  to  products  we  may  develop  for
indications  with  large  patient  populations  and for overseas markets. We may
also  partner  to  further  develop and commercialize ATTENADE. These partnering
arrangements   are  likely  to  include  milestone  payments,  reimbursement  of
research and development expenses and royalty arrangements.



                              RECENT DEVELOPMENTS

In  the  fourth  quarter  of  1999,  clinical  trial  results  for THALOMID were
featured  at  major  medical  meetings  and in prestigious peer review journals.
These  results  validated  the  potential  use  of  THALOMID in the treatment of
multiple  myeloma  and  its  potential  use in the treatment of a broad range of
cancer  and  immunological  diseases.  Multiple myeloma is a malignant cancer of
plasma  cells  of  the  bone  marrow.  In  addition,  we  achieved a significant
milestone   in   our  clinical  development  program  during  this  period.  The
developments  reported  below provide no assurance of success in later phases of
the  clinical  development or regulatory processes necessary for approval of our
drugs.

o At  the  November 1999 Chemotherapy Foundation Symposium in New York, oncology
  teams  from  the  University  College London, NCI, New York University Medical
  Center,  the  University of Arkansas Cancer Research Center and Saint Vincents
  Medical  Center  in  New York presented positive data from five studies on the
  use  of  THALOMID.  These  studies  used  THALOMID,  both  in combination with
  various  chemotherapeutic  agents  and  as stand-alone therapy, in a number of
  solid  tumor  and  blood  cancers,  including  prostate  cancer, brain cancer,
  kidney cancer and multiple myeloma.

o Clinical  research  published  during November 1999 in The New England Journal
  of  Medicine  reported  the  results  of  a  study  on  the use of THALOMID in
  multiple  myeloma  patients who had relapsed after high-dose chemotherapy. The
  Phase  II  trial,  conducted  at  the  University  of Arkansas Cancer Research
  Center,  found  that  32%  of  patients  had  a  partial  response  and 10% of
  patients  had  complete or nearly complete remission. An editorial authored by
  Noopur  Raje,  M.D. and Kenneth Anderson, M.D., both of the Dana-Farber Cancer
  Institute, accompanied the article.

o At  the  November  1999  American  College  of Rheumatology meeting, data were
  presented  from  small,  open label studies of thalidomide in the treatment of
  three  immunological  diseases: sclerodoma, sarcoidosis and spondylarthopathy.
  Each of the three studies presented positive clinical results.

o A  total  of 26 studies were presented or published at the 41st meeting of the
  American  Society  of  Hematology,  or  ASH,  in  December 1999. These studies
  provided  new  data  and expanded upon previously published results on the use
  of  THALOMID  in  treating  advanced  and  refractory  multiple  myeloma.  The
  studies  included  the  use  of thalidomide as a single chemotherapeutic agent
  and  in  combination  with  other  chemotherapeutic  agents. Studies were also
  presented   on  the  use  of  THALOMID  to  treat  the  bone  marrow  disorder
  myelodysplastic  syndrome,  or  MDS.  In  a preliminary report, researchers at
  Rush   Cancer  Institute  in  Chicago  observed  improvements  in  50%  of  20
  evaluable  patients,  with three long-standing, transfusion dependent patients
  able to discontinue transfusions.

o We  have  completed  a  Phase  I safety trial for two of our IMiDs. These were
  placebo  controlled,  double  blind, escalating single dose trials carried out
  in  healthy  human  volunteers.  Results  of  these  trials  will be announced
  during the first quarter of 2000.


                                       3
<PAGE>

                            RECENT OPERATING RESULTS

On  January  27,  2000,  we announced our operating results for the three months
and  year  ended  December  31,  1999. Total revenues for the three months ended
December  31, 1999 were $9.4 million, consisting of product sales of THALOMID of
$9.0  million and $425,000 of revenues from research contracts. The $9.0 million
of  THALOMID sales for the three months ended December 31, 1999 represents a 43%
increase  over  the  $6.3  million  of THALOMID sales for the three months ended
September  30,  1999.  Research  and  development  expenses for the three months
ended  December  31,  1999 increased to $5.2 million, primarily due to increased
clinical  trial costs for ATTENADE. Selling, general and administrative expenses
increased  to  $8.4  million  for  the  three  months  ended  December 31, 1999,
primarily  due  to the expansion of our sales and commercialization organization
and  increased warehousing and distribution expenses. The net loss applicable to
common  stockholders  for  the  three  months  ended  December 31, 1999 was $2.8
million,  or $0.16 per share. The net loss applicable to common stockholders for
the  three  months  and  year  ended December 31, 1999 includes a tax benefit of
$3.0   million  from  the  sale  of  a  portion  of  our  New  Jersey  tax  loss
carryforwards.


                                       4
<PAGE>

                              CELGENE CORPORATION

                          CONSOLIDATED FINANCIAL DATA





<TABLE>
<CAPTION>
                                                                                ---------------------------------
                                                                          THREE MONTHS ENDED            YEAR ENDED
                                                                             DECEMBER 31,              DECEMBER 31,
                                                                       ------------------------- -------------------------
                                                                                1998        1999         1998         1999
                                                                       ------------- ----------- ------------ ------------
                                                                              (UNAUDITED)               (UNAUDITED)
<S>                                                                    <C>           <C>         <C>          <C>
In thousands, except per share data
STATEMENTS OF OPERATIONS DATA:
Revenues:
 Product sales .......................................................   $ 2,235      $  8,988    $   3,266    $  24,052
 Research contracts ..................................................       430           425          535        2,158
                                                                         -------      --------    ---------    ---------
   Total Revenues ....................................................     2,665         9,413        3,801       26,210
Expenses:
 Cost of goods sold ..................................................       223           906          282        2,983
 Research and development ............................................     5,804         5,280       19,772       19,646
 Selling, general and administrative .................................     5,011         8,389       16,219       26,236
                                                                         -------      --------    ---------    ---------
   Total expenses ....................................................    11,038        14,575       36,273       48,865
                                                                         -------      --------    ---------    ---------
Operating loss .......................................................    (8,373)       (5,162)     (32,472)     (22,655)
Other--income (expense), net .........................................        (2)         (701)         449       (2,144)
                                                                         -------      --------    ---------    ---------
Loss before tax benefit ..............................................    (8,375)       (5,863)     (32,023)     (24,799)
Tax benefit ..........................................................        --         3,018           --        3,018
                                                                         ---------    --------    ---------    ---------
Loss from continuing operations ......................................    (8,375)       (2,845)     (32,023)     (21,781)
Gain from discontinued operations, net ...............................        --            --        6,955           --
Accretion of premium payable on preferred stock and warrants .........        --            --           25           --
                                                                         ---------    --------    ---------    ---------
Net loss applicable to common stockholders ...........................   $(8,375)     $ (2,845)   $ (25,093)   $ (21,781)
                                                                         =========    ========    =========    =========
Per share--basic and diluted:
 Loss from continuing operations, net ................................   $ (0.51)     $  (0.16)   $   (1.98)   $   (1.28)
 Net loss applicable to common stockholders ..........................   $ (0.51)     $  (0.16)   $   (1.55)   $   (1.28)
                                                                         =========    ========    =========    =========
Weighted average number of shares of common stock
 outstanding .........................................................    16,449        17,334       16,160       17,012
</TABLE>


<TABLE>
<CAPTION>
                                                                              --------------
                                                                               DECEMBER 31,
                                                                        ---------------------------
                                                                                 1998          1999
                                                                        ------------- -------------
                                                                                (UNAUDITED)
<S>                                                                     <C>           <C>
In thousands
BALANCE SHEET DATA:
Cash and cash equivalents and marketable securities available for sale   $    5,124    $   19,527
Total assets ..........................................................      11,928        32,334
Long term convertible notes ...........................................       8,349        38,495
Accumulated deficit ...................................................    (144,613)     (166,394)
Total stockholders' deficit ...........................................      (3,733)      (15,709)
</TABLE>

Celgene  Corporation  was  incorporated  in  Delaware  in  1986.  Our  principal
executive  offices are located at 7 Powder Horn Drive, Warren, New Jersey 07059;
our telephone number is (732) 271-1001.


                                       5
<PAGE>

                                  THE OFFERING

The  following  information  is  based  on  17,703,646  shares  of  common stock
outstanding  as  of  December 31, 1999. This number excludes 4,780,624 shares of
common  stock  issuable  upon  the exercise of our outstanding stock options and
warrants  and  conversion of our convertible notes, other than the conversion by
the  selling stockholders immediately prior to this offering of a portion of our
9.0%  convertible  notes  issued  in  January  1999. This number also assumes no
exercise of the underwriters' over-allotment option.



<TABLE>
<S>                                                <C>
COMMON STOCK OFFERED BY CELGENE .................. 2,484,000 shares

COMMON STOCK OFFERED BY THE SELLING
 STOCKHOLDERS .................................... 516,000 shares

COMMON STOCK OUTSTANDING AFTER THIS OFFERING ..... 20,703,646 shares

OVER-ALLOTMENT OPTION ............................ 450,000 shares

USE OF PROCEEDS .................................. We intend to use the net proceeds we receive from this
                                                   offering for:

                                                   o    the further  commercialization and clinical development
                                                        of THALOMID,  including  the expansion of our sales and
                                                        commercialization organization;

                                                   o    the  further  development  of our  oncology  and  immunology
                                                        programs, including our IMiD and SelCID therapeutic agents;

                                                   o    the further  development of our chiral  products,  including
                                                        ATTENADE; and

                                                   o    general corporate purposes.

                                                   We will not receive any of the proceeds from the sale of
                                                   shares of our common stock by the selling stockholders.

DIVIDEND POLICY .................................. We have never declared or paid any cash dividends on our
                                                   common stock. We currently intend to retain any future
                                                   earnings for funding growth, and, therefore, do not anticipate
                                                   that we will pay any cash dividends on our common stock in
                                                   the foreseeable future.

NASDAQ NATIONAL MARKET SYMBOL .................... CELG
</TABLE>



                                       6
<PAGE>

                      SUMMARY CONSOLIDATED FINANCIAL DATA

The  as  adjusted  balance  sheet  data below is adjusted to reflect the sale of
2,484,000  shares of our common stock offered by us and the receipt by us of the
net  proceeds  therefrom  at a public offering price of $101 per share and after
deduction  of the underwriting discounts and offering expenses payable by us and
the  conversion  of a portion of our $15.0 million 9.0% convertible notes issued
in  January  1999  held  by  the selling stockholders into 516,000 shares of our
common stock.




<TABLE>
<CAPTION>
                                                       --------------------------------------------------------
                                                                       YEAR ENDED DECEMBER 31,
                                              --------------------------------------------------------------------------
                                                        1994           1995           1996           1997           1998
                                              -------------- -------------- -------------- -------------- --------------
<S>                                           <C>            <C>            <C>            <C>            <C>
In thousands, except share data
STATEMENTS OF OPERATIONS DATA:
Total revenues ..............................   $       98     $      472     $      882     $    1,122     $    3,801
Total expenses ..............................        6,396          8,982         18,924         26,526         36,273
                                                ----------     ----------     ----------     ----------     ----------
Operating loss ..............................       (6,298)        (8,510)       (18,042)       (25,404)       (32,472)
Other income (expense), net .................          587            143            984            384            449
                                                ----------     ----------     ----------     ----------     ----------
Loss from continuing operations .............       (5,711)        (8,367)       (17,058)       (25,020)       (32,023)
Gain (loss) from discontinued operations.....       (4,502)        (2,150)          (761)          (427)         6,955
                                                ----------     ----------     ----------     ----------     ----------
Net loss ....................................      (10,213)       (10,517)       (17,819)       (25,447)       (25,068)
Accretion of premium payable on
 preferred stock and warrants ...............           --             --          1,013            521             25
Deemed dividend for preferred stock
 conversion discount ........................           --             --          2,778            953             --
                                                ----------     ----------     ----------     ----------     ----------
Net loss applicable to common
 stockholders ...............................   $  (10,213)    $  (10,517)    $  (21,610)    $  (26,921)    $  (25,093)
                                                ==========     ==========     ==========     ==========     ==========
Per share -- basic and diluted:
 Net loss applicable to common
  stockholders ..............................   $    (1.30)    $    (1.30)    $    (2.29)    $    (2.20)    $    (1.55)
                                                ==========     ==========     ==========     ==========     ==========
Weighted average number of shares of
 common stock outstanding ...................        7,853          8,073          9,450         12,215         16,160



<CAPTION>
                                              ----------------------------
                                                    NINE MONTHS ENDED
                                                      SEPTEMBER 30,
                                              -----------------------------
                                                        1998           1999
                                              -------------- --------------
                                                       (UNAUDITED)
<S>                                           <C>            <C>
In thousands, except share data
STATEMENTS OF OPERATIONS DATA:
Total revenues ..............................   $    1,136     $   16,796
Total expenses ..............................       25,235         34,289
                                                ----------     ----------
Operating loss ..............................      (24,099)       (17,493)
Other income (expense), net .................          452         (1,443)
                                                ----------     ----------
Loss from continuing operations .............      (23,647)       (18,936)
Gain (loss) from discontinued operations.....        6,955             --
                                                ----------     ----------
Net loss ....................................      (16,692)       (18,936)
Accretion of premium payable on
 preferred stock and warrants ...............           25             --
Deemed dividend for preferred stock
 conversion discount ........................           --             --
                                                ----------     ----------
Net loss applicable to common
 stockholders ...............................   $  (16,717)    $  (18,936)
                                                ==========     ==========
Per share -- basic and diluted:
 Net loss applicable to common
  stockholders ..............................   $    (1.04)    $    (1.12)
                                                ==========     ==========
Weighted average number of shares of
 common stock outstanding ...................       16,062         16,903
</TABLE>


<TABLE>
<CAPTION>
                                                                                ----------------
                                                                               SEPTEMBER 30, 1999
                                                                          ----------------------------
                                                                                 ACTUAL    AS ADJUSTED
                                                                          -------------   ------------
                                                                                  (UNAUDITED)
<S>                                                                       <C>             <C>
In thousands
BALANCE SHEET DATA:
Cash and cash equivalents and marketable securities available for sale     $   18,624      $  253,963
Total assets ..........................................................        27,089         262,079
Long term convertible notes ...........................................        38,458          29,171
Accumulated deficit ...................................................      (163,549)       (163,549)
Total stockholders' equity (deficit) ..................................       (18,496)        225,851
</TABLE>

                                       7
<PAGE>

                                 RISK FACTORS
You  should  carefully consider the following risk factors, as well as the other
information  contained  in  this prospectus or incorporated by reference in this
prospectus, before purchasing any of our common stock.


RISKS TO CELGENE


IF  WE  ARE  UNSUCCESSFUL  IN  DEVELOPING  AND COMMERCIALIZING OUR PRODUCTS, OUR
BUSINESS,  FINANCIAL  CONDITION  AND  RESULTS  OF OPERATIONS COULD BE MATERIALLY
ADVERSELY AFFECTED.

Many  of  our  products  and  processes  are  in  the  early  or  mid-stages  of
development  and will require the commitment of substantial resources, extensive
research,  development,  preclinical  testing,  clinical  trials,  manufacturing
scale-up  and regulatory approval prior to being ready for sale. We have not yet
sold  any  of  our  products other than THALOMID. All of our other products will
require  further  development,  clinical  testing  and regulatory approvals, and
there  can  be  no  assurance that commercially viable products will result from
these  efforts.  If  any of our products, even if developed and approved, cannot
be  successfully  commercialized,  our business, financial condition and results
of operations could be materially adversely affected.


DURING  THE  NEXT  SEVERAL  YEARS,  WE  WILL BE VERY DEPENDENT ON THE COMMERCIAL
SUCCESS OF THALOMID.

At  our  present level of operations, we may not be able to attain profitability
if  physicians  prescribe  THALOMID  only  for those who are diagnosed with ENL.
Under  current  FDA  regulations,  we  are  limited  in  our  ability to promote
THALOMID  outside  this  approved  use.  The  market  for the use of THALOMID in
patients  suffering  from  ENL  is  relatively small. We have initiated clinical
studies  to  examine  whether or not THALOMID is effective and safe when used to
treat  disorders  other  than ENL, but we do not know whether these studies will
in  fact demonstrate safety and efficacy, or if they do, whether we will succeed
in  receiving regulatory approval to market THALOMID for additional indications.
If  the  results  of  these  studies are negative, or if adverse experiences are
reported  in  these  clinical studies or otherwise in connection with the use of
THALOMID  by  patients,  this could undermine physician and patient comfort with
the  product,  could  limit the commercial success of the product and could even
impact  the  acceptance  of THALOMID in the ENL market. FDA regulations restrict
our  ability  to  communicate  the  results  of  additional  clinical studies to
patients  and physicians without first obtaining approval from the FDA to expand
the authorized uses for this product.


IF  OUR  PRODUCTS  ARE  NOT  ACCEPTED  BY  THE  MARKET,  OUR BUSINESS, FINANCIAL
CONDITION AND RESULTS OF OPERATIONS COULD BE MATERIALLY ADVERSELY AFFECTED.

There  can  be  no  assurance that those of our products that receive regulatory
approval,  including  THALOMID,  or  those  products  for  which  no  regulatory
approval  is  required,  will  achieve  market  acceptance.  A number of factors
render  the degree of market acceptance of our products uncertain, including the
extent   to  which  we  can  demonstrate  the  products'  efficacy,  safety  and
advantages,  if  any,  over  competing  products,  as  well as the reimbursement
policies  of third party payors, such as government and private insurance plans.
Failure  of  our  products  to  achieve  market acceptance would have a material
adverse effect on our business, financial condition and results of operations.


WE  FACE  A  RISK  OF  PRODUCT  LIABILITY  CLAIMS  AND MAY NOT BE ABLE TO OBTAIN
INSURANCE.

We  may  be  subject  to  product liability or other claims based on allegations
that  the  use  of  our  technology or products has resulted in adverse effects,
whether  by  participants  in  our  clinical  trials  or  by  patients using our
products.  Thalidomide,  when  used  by  pregnant women, has resulted in serious
birth  defects.  Therefore,  necessary  and  strict precautions must be taken by
physicians  prescribing the drug to women with childbearing potential, and there
can  be  no assurance that such precautions will be observed in all cases or, if
observed,  will  be effective. Use of thalidomide has also been associated, in a
limited  number  of  cases,  with  other  side  effects, including nerve damage.
Although  we  have  product  liability insurance that we believe is appropriate,
there  can be no assurance that we will be able to obtain additional coverage if
required,  or  that  such  coverage  will be adequate to protect us in the event
claims  are  asserted  against  us.  Our obligation to defend against or pay any
product  liability  or  other  claim  may  have a material adverse effect on our
business, financial condition and results of operations.


                                       8
<PAGE>

WE  HAVE  A  HISTORY OF OPERATING LOSSES AND AN ACCUMULATED DEFICIT AND MAY NEED
TO SEEK ADDITIONAL FUNDING.

We  have  sustained  losses  in  each  year  since our incorporation in 1986. We
sustained  net  losses  of  $25.1  million and $25.4 million for the years ended
December  31,  1998  and  1997,  and  $18.9  million  for  the nine months ended
September  30,  1999. We had an accumulated deficit of $144.6 million and $119.5
million  at  December  31,  1998  and  1997, and $163.5 million at September 30,
1999.  We  expect  to  make  substantial  expenditures  to  further  develop and
commercialize  our  products,  and,  based on these expenditures, it is probable
that  losses  will continue for at least the next six months. We expect that our
rate  of  spending  will  accelerate  as  the result of increased clinical trial
costs  and expenses associated with regulatory approval and commercialization of
products  now  in  development.  In order to fund our future operations, we will
likely  seek  additional capital. We may not be able to raise additional capital
on  reasonable  terms,  if  at  all.  There  can  be  no  assurance, assuming we
successfully  raise  additional  funds,  that  we  will achieve profitability or
positive cash flow.


WE MAY EXPERIENCE SIGNIFICANT FLUCTUATIONS IN OUR QUARTERLY OPERATING RESULTS.

We  have  historically  experienced,  and expect to continue for the foreseeable
future  to  experience,  significant  fluctuations  in  our  quarterly operating
results.  These  fluctuations  are due to a number of factors, many of which are
outside  our  control,  and  may result in volatility of our stock price. Future
operating results will depend on many factors, including:

o    demand for our products;

o    regulatory approvals for our products;

o    the timing of the introduction and market  acceptance of new products by us
     or competing companies;

o    the timing of certain research and development milestones; and

o    our ability to control our costs.


WE  HAVE  NO MANUFACTURING CAPABILITIES AND WE ARE DEPENDENT ON ONE SUPPLIER FOR
THE  RAW  MATERIAL AND ONE MANUFACTURER FOR THE FORMULATION AND ENCAPSULATION OF
THALOMID.

We  currently  have  no  experience in, or our own facilities for, manufacturing
any  products  on  a commercial scale. Currently, we obtain all of our bulk drug
material  for  THALOMID from a single supplier and rely on a single manufacturer
to  formulate  and  encapsulate THALOMID. The FDA requires that all suppliers of
pharmaceutical  bulk  material and all manufacturers of pharmaceuticals for sale
in  or  from  the  United  States achieve and maintain compliance with the FDA's
current  Good  Manufacturing  Practice,  or cGMP, regulations and guidelines. If
the  operations  of  the  sole  supplier or the sole manufacturer were to become
unavailable  for  any  reason,  the  required  FDA  review  and  approval of the
operations  of  a  new  supplier  or new manufacturer could cause a delay in the
manufacture  of  THALOMID  which  could  have  a  material adverse effect on our
business,  financial  condition and results of operations. We intend to continue
to  utilize  outside  manufacturers  if  and  when  needed  to produce our other
products  on  a  commercial  scale. If our outside manufacturers do not meet our
requirements  for  quality,  quantity  or  timeliness,  or  do  not  achieve and
maintain  compliance  with  all  applicable regulations, our business, financial
condition and results of operations could be materially adversely affected.


WE HAVE LIMITED MARKETING AND DISTRIBUTION CAPABILITIES.

Although  we  have  a  60  person  sales  and  commercialization  group  to sell
THALOMID,  we  may  be required to seek a corporate partner to provide marketing
services  with  respect  to  our  other  products. Any delay in developing these
resources  could have a material adverse impact on our results of operations. We
have  contracted with a specialty distributor to distribute THALOMID. Failure of
this  specialty  distributor  to  perform  its obligations could have a material
adverse effect on our business, financial condition and results of operations.


WE ARE DEPENDENT ON COLLABORATIONS AND LICENSES WITH THIRD PARTIES.

Our  ability  to  fully  commercialize our products, if developed, may depend to
some  extent  upon  our  entering into joint ventures or other arrangements with
established   pharmaceutical   companies   with  the  requisite  experience  and
financial  and other resources to obtain regulatory approvals and to manufacture
and  market  such  products.  Accordingly, our success may depend, in part, upon
the  subsequent  success  of  such  third  parties in performing preclinical and
clinical trials, obtaining


                                       9
<PAGE>

the  requisite  regulatory  approvals,  scaling  up  manufacturing, successfully
commercializing  the  licensed product candidates and otherwise performing their
obligations to us. We cannot assure you that:

o    we will be able to enter  into  joint  ventures  or other  arrangements  on
     acceptable terms, if at all;

o    our joint ventures or other arrangements will be successful;

o    our  joint  ventures  or other  arrangements  will  lead to the  successful
     development and commercialization of any products;

o    we will be able to obtain or maintain proprietary rights or licenses to any
     technology or products  developed in connection  with our joint ventures or
     other arrangements; or

o    we will be able to preserve the  confidentiality  of any proprietary rights
     or  information  developed in connection  with our joint  ventures or other
     arrangements.


THE  HAZARDOUS  MATERIALS WE USE IN OUR RESEARCH AND DEVELOPMENT COULD RESULT IN
SIGNIFICANT  LIABILITIES WHICH COULD EXCEED OUR INSURANCE COVERAGE AND FINANCIAL
RESOURCES.

We  use  some  hazardous  materials  in our research and development activities.
While  we  believe  we are currently in substantial compliance with the federal,
state  and  local  laws and regulations governing the use of these materials, we
cannot  assure  you  that accidental injury or contamination will not occur. Any
such  accident  or  contamination could result in substantial liabilities, which
could  exceed  our  insurance coverage and financial resources. Additionally, we
cannot  assure  you  that  the  cost of compliance with environmental and safety
laws and regulations will not increase in the future.


RESIDUAL YEAR 2000 PROBLEMS COULD CAUSE A MATERIAL DISRUPTION IN OUR BUSINESS.

Although  all  of  our computer hardware and software has been upgraded for Year
2000  compliance,  all  of our key vendors have provided assurance that they are
Year  2000  compliant  and there were no related problems at the transition into
the  Year  2000,  any  residual  effect  of  the Year 2000 problem could cause a
material disruption in our business.


INDUSTRY RISKS


THE   PHARMACEUTICAL  AND  AGROCHEMICAL  INDUSTRIES  ARE  SUBJECT  TO  EXTENSIVE
GOVERNMENT REGULATION AND THERE IS NO ASSURANCE OF REGULATORY APPROVAL.

The  preclinical  development,  clinical  trials,  manufacturing,  marketing and
labeling  of pharmaceuticals are all subject to extensive regulation by numerous
governmental  authorities and agencies in the United States and other countries.
There  can  be  no  assurance  that  we  will  be  able  to obtain the necessary
approvals  required to market our products in any of these markets. The testing,
marketing  and  manufacturing  of our products will require regulatory approval,
including  approval from the FDA and, in some cases, from the U.S. Environmental
Protection  Agency,  or  the EPA, and the U.S. Department of Agriculture, or the
USDA,  or  governmental  authorities  outside  of the United States that perform
roles  similar  to  those  of  the  FDA  and  EPA. Certain of our pharmaceutical
products  in  development also fall under the Controlled Substances Act of 1970,
or  the  CSA,  which requires authorization by the U.S. Drug Enforcement Agency,
or  the DEA, of the U.S. Department of Justice in order to handle and distribute
these  products.  It  is not possible to predict how long the approval processes
of  the  FDA,  EPA,  DEA  or  any  other  applicable  federal,  state or foreign
regulatory  authority or agency for any of our products will take or whether any
such  approvals  ultimately  will  be  granted.  Positive results in preclinical
testing  and/or  early phases of clinical studies are no assurance of success in
later  phases  of  the  approval  process.  Risks associated with the regulatory
approval process include:

o    in general,  preclinical tests and clinical trials can take many years, and
     require the  expenditure  of substantial  resources,  and the data obtained
     from these tests and trials can be  susceptible  to varying  interpretation
     that could delay, limit or prevent regulatory approval;

o    delays or rejections may be encountered  during any stage of the regulatory
     approval  process  based upon the failure of the  clinical or other data to
     demonstrate  compliance with, or upon the failure of the product to meet, a
     regulatory  agency's  requirements for safety,  efficacy and quality or, in
     the case of a product  seeking an orphan drug  indication,  because another
     designee received approval first;

o    requirements  for  approval  may become  more  stringent  due to changes in
     regulatory   agency  policy,   or  the  adoption  of  new   regulations  or
     legislation;


                                       10
<PAGE>

o    the scope of any  regulatory  approval,  when obtained,  may  significantly
     limit the indicated uses for which a product may be marketed;

o    approved  drugs  and  agrochemicals,  as well as their  manufacturers,  are
     subject to  continuing  and on-going  review,  and  discovery of previously
     unknown  problems with these products may result in  restrictions  on their
     manufacture, sale or use or in their withdrawal from the market; and

o    regulatory  authorities and agencies may promulgate additional  regulations
     restricting the sale of our existing and proposed products.

Once  approved,  we cannot guarantee that the FDA will permit us to market those
products  for  broader  or  different  applications,  or  that  it will grant us
approval   with   respect  to  separate  product  applications  which  represent
extensions  of  our  basic  technology,  or  that existing approvals will not be
withdrawn  or modified in a significant manner. In addition, it is possible that
the  FDA  will  promulgate  additional  regulations  restricting the sale of our
present or proposed products.

Labeling  and  promotional  activities  are  subject  to scrutiny by the FDA and
state  regulatory  agencies  and,  in  some  circumstances, by the Federal Trade
Commission.  FDA enforcement policy prohibits the marketing of approved products
for   unapproved,   or   off-label,  uses.  These  regulations,  and  the  FDA's
interpretation  of  them,  may impair our ability to effectively market THALOMID
or  other  products  which  gain approval. The FDA actively enforces regulations
prohibiting  promotion of off-label uses and the promotion of products for which
approval  has  not  been obtained. Failure to comply with these requirements can
result  in  regulatory  enforcement  action  by  the  FDA. The FDA is aware that
physicians  prescribe  THALOMID for off-label uses and has not, as of this date,
initiated  any  regulatory actions against us. FDA approval of THALOMID requires
that  we  distribute  it  under the rigid standards of our S.T.E.P.S. program in
order to maintain approval.

Delays  in obtaining, or the failure to obtain and maintain, necessary approvals
from  the  FDA,  EPA, DEA or other applicable regulatory authorities or agencies
for   our   proprietary  products  or  regulatory  enforcement  actions  by  FDA
concerning  our  marketing practices would have a material adverse effect on our
business, financial condition and results of operations.


WE MAY NOT BE ABLE TO PROTECT OUR INTELLECTUAL PROPERTY.

Our  success will depend, in part, on our ability to obtain and enforce patents,
protect  trade  secrets,  obtain  licenses to technology owned by third parties,
when   necessary,   and   conduct  our  business  without  infringing  upon  the
proprietary  rights  of  others.  The  patent positions of pharmaceutical firms,
including  ours,  can  be  uncertain  and  involve  complex  legal  and  factual
questions.  In  addition, the coverage sought in a patent application may not be
obtained   or  may  be  significantly  reduced  before  the  patent  is  issued.
Consequently,  we  do  not  know  whether  any  of our pending applications will
result  in  the  issuance of patents or, if any patents are issued, whether they
will  provide significant proprietary protection or commercial advantage. If any
of  our  issued  or  licensed patents are infringed, we cannot guarantee that we
will  be  successful in enforcing our intellectual property rights. Moreover, we
cannot   assure   you  that  we  can  successfully  defend  against  any  patent
infringement  suit  that  may  be  brought  against  us by a third party. Patent
infringement  lawsuits in the pharmaceutical and biotechnology industries can be
complex,  lengthy  and  costly to both parties. Further, we rely upon unpatented
proprietary  and  trade  secret  technology  that we try to protect, in part, by
confidentiality   agreements   with   our   collaborative  partners,  employees,
consultants,  outside  scientific collaborators, sponsored researchers and other
advisors.  There  can be no assurance that these agreements will not be breached
or  that  we  would have adequate remedies for any such breach. We cannot assure
you  that,  despite precautions taken by us, others have not and will not obtain
access  to  our proprietary technology or that such technology will not be found
to  be  non-proprietary  or  not  a  trade  secret.  Our  right  to practice the
inventions  claimed  in  some patents which relate to products under development
and  THALOMID arises under licenses granted to us by others, including EntreMed,
Inc.  and  The  Rockefeller  University. While we believe these agreements to be
valid  and  enforceable,  we  cannot  assure  you  that  our  rights under these
agreements  will  continue  or that disputes concerning these agreement will not
arise.  In  addition, certain of the grants contained in the licenses granted to
us  depend  upon the validity and enforceability of other agreements to which we
are not a party.


THE  PHARMACEUTICAL  AND  AGROCHEMICAL  INDUSTRIES  ARE  HIGHLY  COMPETITIVE AND
SUBJECT TO RAPID AND SIGNIFICANT TECHNOLOGICAL CHANGE.

The  pharmaceutical  and  agrochemical industries in which we operate are highly
competitive  and  subject  to  rapid  and  significant technological change. Our
present  and  potential  competitors  include  major chemical and pharmaceutical
companies,  as well as specialized pharmaceutical firms. Most of these companies
have considerably greater financial,


                                       11
<PAGE>

technical  and  marketing resources than us. We also experience competition from
universities  and other research institutions and, in some instances, we compete
with  others  in acquiring technology from these sources. The pharmaceutical and
agrochemical  industries  have  undergone,  and  are  expected  to  continue  to
undergo,  rapid  and significant technological change, and we expect competition
to  intensify  as  technical  advances  in  each  field are made and become more
widely  known.  The  development  of  products  or  processes  with  significant
advantages  over  those  that  we  are  seeking to develop could have a material
adverse effect on our business, financial condition and results of operations.


SALES OF OUR PRODUCTS ARE DEPENDENT ON THIRD-PARTY REIMBURSEMENT.

Sales  of our products will depend, in part, on the extent to which the costs of
our  products will be paid by health maintenance, managed care, pharmacy benefit
and  similar  health  care management organizations, or reimbursed by government
health  administration  authorities,  private health coverage insurers and other
third-party  payors.  These health care management organizations and third-party
payors  are increasingly challenging the prices charged for medical products and
services.  Additionally,  the  containment  of  health  care  costs has become a
priority  of  federal  and  state governments, and the prices of drugs have been
targeted  in  this  effort.  We  cannot  assure  you  that  our products will be
considered  cost  effective  by payors, that reimbursement will be available or,
if  available, that the level of reimbursement will be sufficient to allow us to
sell our products on a profitable basis.


OFFERING RISKS


THE  PRICE  OF  OUR  COMMON STOCK HAS EXPERIENCED SUBSTANTIAL VOLATILITY AND MAY
CONTINUE TO DO SO IN THE FUTURE.

There  has  been significant volatility in the market prices for publicly traded
shares  of  pharmaceutical  companies, including ours. In 1999, the price of our
common  stock  fluctuated  from  a  low  of  $11  5/16  to a high of $72 5/8. On
February  10, 2000, our common stock closed at a price of $103. The price of our
common  stock  may not remain at or exceed current levels. The following factors
may have an adverse impact on the market price of our common stock:

o    announcements   of  technical  or  product   developments   by  us  or  our
     competitors;

o    market conditions for pharmaceutical and biotechnology stocks;

o    market conditions generally;

o    governmental regulation;

o    healthcare legislation;

o    public  announcements  regarding  medical  advances in the treatment of the
     disease states that we are targeting;

o    patent or proprietary rights developments;

o    changes in third-party reimbursement policies for our products; or

o    fluctuations in our operating results.


THE  NUMBER  OF  SHARES  OF  OUR  COMMON  STOCK  ELIGIBLE  FOR FUTURE SALE COULD
ADVERSELY AFFECT THE MARKET PRICE OF OUR COMMON STOCK.

Future  sales  of substantial amounts of our common stock could adversely affect
the  market  price  of  our  common  stock.  As of December 31, 1999, there were
outstanding  stock  options  for  2,327,267  shares  of  common  stock, of which
967,234  were currently exercisable, and warrants either outstanding or issuable
upon  demand  that  are  exercisable  for  551,044  shares  of  common stock. In
addition,  the  9.25%  convertible  note  issued  on  September  16, 1998 can be
converted  into  795,463  shares  of  common  stock,  the 9.0% convertible notes
issued  on January 20, 1999 can be converted into 833,400 shares of common stock
and  the  9.0%  convertible  notes  issued on July 6, 1999 can be converted into
789,450  shares of common stock. Immediately prior to this offering, the selling
stockholders  will  convert  a  portion  of our 9.0% convertible notes issued in
January  1999  held  by  them  into  516,000  shares  of  our common stock. Upon
issuance  or  conversion,  all  of  these  shares of common stock will be freely
tradable.


                                       12
<PAGE>

INVESTORS IN THIS OFFERING WILL SUFFER IMMEDIATE AND SUBSTANTIAL DILUTION.

We  expect  that  the public offering price of our common stock in this offering
will  be  substantially higher than the net tangible book value per share of our
outstanding  common stock. As of September 30, 1999, our net negative book value
was  $(19.1)  million and on a pro forma basis our net tangible book value after
this  offering  will  be  $225.6  million.  The  amount  of  the increase in net
tangible  book  value  attributable  to  the  investors in this offering will be
$36.9  million,  or  $12.31  per  share of common stock. Investors of our common
stock  in  this  offering  will experience immediate and substantial dilution of
approximately $269.4 million, or $89.80 per share of common stock.


OUR  SHAREHOLDER RIGHTS PLAN AND CERTAIN CHARTER AND BY-LAW PROVISIONS MAY DETER
A THIRD PARTY FROM ACQUIRING US.

Our  board  of  directors  has adopted a shareholder rights plan, the purpose of
which  is  to  protect  stockholders  against  unsolicited  attempts  to acquire
control  of  us  that  do not offer a fair price to all of our stockholders. The
rights  plan  may have the effect of dissuading a potential acquirer from making
an  offer  for our common stock at a price that represents a premium to the then
current trading price.

Our  board of directors has the authority to issue, at any time, without further
stockholder  approval,  up  to  5,000,000  shares  of  preferred  stock,  and to
determine  the  price,  rights,  privileges and preferences of those shares. Any
issuance  of  preferred  stock  could  discourage a third party from acquiring a
majority  of  our outstanding voting stock. Additionally, our board of directors
has  adopted  certain  amendments  to  our  by-laws  intended  to strengthen the
board's position in the event of a hostile takeover attempt.

Furthermore,  we  are  subject  to the provisions of Section 203 of the Delaware
General  Corporation  Law,  an  anti-takeover  law,  which  may  also dissuade a
potential acquiror of our common stock.



                          FORWARD-LOOKING STATEMENTS

Certain  statements  contained  or  incorporated by reference in this prospectus
are  forward-looking  statements  concerning  our business, financial condition,
results   of   operations,   economic   performance   and  financial  condition.
Forward-looking  statements  within the meaning of Section 27A of the Securities
Act  of  1933  and  within the meaning of Section 21E of the Securities Exchange
Act of 1934 are included, for example, in the discussions about:

o    our strategy;

o    new product development or product introduction;

o    product sales, royalties and contract revenues;

o    expenses and net income;

o    our credit risk management;

o    our liquidity;

o    our asset/liability risk management; and

o    our operational and legal risks.

These  statements  involve  risks  and  uncertainties. Actual results may differ
materially  from  those  expressed  or implied in those statements. Factors that
could  cause  such  differences include, but are not limited to, those discussed
under  "Risk  Factors"  and  "Management's  Discussion and Analysis of Financial
Condition and Results of Operations."


                                       13
<PAGE>

                                USE OF PROCEEDS

The  net  proceeds from the sale of 2,484,000 shares of our common stock offered
by  us will be approximately $235.3 million, $278.1 million if the underwriters'
over-allotment  option  is exercised in full, at a public offering price of $101
per  share  and  after  deduction  of  the  underwriting discounts and estimated
offering  expenses payable by us. We will not receive any proceeds from the sale
of shares of common stock in this offering by the selling stockholders.

We intend to use the net proceeds we receive from this offering for:

o    the  further   commercialization  and  clinical  development  of  THALOMID,
     including the expansion of our sales and commercialization organization;

o    the further development of our oncology and immunology programs,  including
     our IMiD and SelCID therapeutic agents;

o    the further development of our chiral products, including ATTENADE; and

o    general corporate purposes.

Pending  use  of  the  net  proceeds we receive from this offering for the above
purposes, we intend to invest funds in investment grade debt obligations.



                          PRICE RANGE OF COMMON STOCK

Our  common  stock  is  traded  on  the  Nasdaq National Market under the symbol
"CELG."  The  following  table  sets  forth,  for  the  periods  indicated,  the
intra-day  high  and  low  sale  prices  per share of common stock on the Nasdaq
National Market:




<TABLE>
<CAPTION>
                                                        -------------------
                                                            HIGH          LOW
                                                      ----------   ----------
<S>                                                   <C>          <C>
2000
First Quarter (through February 10, 2000) .........   $  112       $   55

1999
Fourth Quarter ....................................   $   72 5/8   $   24 3/4
Third Quarter .....................................       29           14
Second Quarter ....................................       20 1/16      13 9/16
First Quarter .....................................       18 5/8       11 5/16

1998
Fourth Quarter ....................................   $   17 1/4   $    7 1/2
Third Quarter .....................................       15            4 1/8
Second Quarter ....................................       11 1/2        8 1/4
First Quarter .....................................       11 5/8        6 15/16
</TABLE>

The  last  reported sales price per share of common stock on the Nasdaq National
Market  on  February  10,  2000  was  $103.  As of December 31, 1999, there were
approximately 450 holders of record of our common stock.



                                DIVIDEND POLICY

We  have  never  declared  or  paid  any  cash dividends on our common stock. We
currently  intend  to  retain  any  future  earnings  for  funding  growth  and,
therefore,  do  not  anticipate paying any cash dividends on our common stock in
the foreseeable future.


                                       14
<PAGE>

                                CAPITALIZATION

The following table sets forth, as of September 30, 1999:

o    our actual cash and cash  equivalents and marketable  securities  available
     for sale and capitalization;

o    our cash and cash equivalents and marketable  securities available for sale
     and capitalization as adjusted to reflect:

     --   the sale of 2,484,000 shares of our common stock offered by us and the
          receipt by us of the net proceeds therefrom at a public offering price
          of $101 per share and after  deduction of the  underwriting  discounts
          and offering expenses payable by us; and

     --   the  conversion by the selling  stockholders  of a portion of our 9.0%
          convertible  notes issued in January  1999 into 516,000  shares of our
          common stock.

This  table  should  be  read  in  conjunction  with  our consolidated financial
statements  and the related notes thereto included elsewhere in this prospectus.





<TABLE>
<CAPTION>
                                                                                               -----------------
                                                                                               SEPTEMBER 30, 1999
                                                                                          ----------------------------
                                                                                                 ACTUAL    AS ADJUSTED
In thousands                                                                              -------------   ------------
<S>                                                                                       <C>             <C>
Cash and cash equivalents and marketable securities available for sale ................    $   18,624      $  253,963
                                                                                           ==========      ==========
Capital lease obligation-net of current portion .......................................    $       45      $       45
Long term convertible notes ...........................................................        38,458          29,171
Stockholders' equity (deficit):
 Common stock, $.01 par value per share; 30,000,000 shares authorized; 17,151,595
   shares issued and outstanding; 20,151,595 shares issued and outstanding as adjusted            172             202
 Additional paid-in capital ...........................................................       144,945         389,262
 Accumulated deficit ..................................................................      (163,549)       (163,549)
 Accumulated other comprehensive loss .................................................           (64)            (64)
                                                                                           ----------      ----------
   Total stockholders' equity (deficit) ...............................................       (18,496)        225,851
                                                                                           ----------      ----------
     Total capitalization .............................................................    $   20,007      $  255,067
                                                                                           ==========      ==========

</TABLE>

The  above  table excludes, as of September 30, 1999, 1,902,313 shares of common
stock  reserved  for  issuance upon conversion of our convertible notes, 602,833
shares  reserved  for  issuance  upon  exercise  of our outstanding warrants and
2,768,756  shares  reserved  for issuance upon exercise of our outstanding stock
options.


                                       15
<PAGE>

                     SELECTED CONSOLIDATED FINANCIAL DATA

The   following   selected   consolidated  financial  data  should  be  read  in
conjunction  with  our  consolidated  financial statements and the related notes
thereto,  "Management's  Discussion  and  Analysis  of  Financial  Condition and
Results  of  Operations"  and  other financial information included elsewhere in
this  prospectus.  The  statements  of  operations  data set forth below for the
years  ended  December  31, 1996, 1997 and 1998 and the balance sheet data as of
December  31,  1997  and  1998  are  derived  from  our  consolidated  financial
statements  which  have  been  audited by KPMG LLP, independent certified public
accountants,  and  which  are  included  elsewhere  in  this  prospectus and are
qualified  by  reference  to  such  consolidated  financial  statements  and the
related  notes  thereto.  Some  other  information  has  been derived from other
audited  consolidated  financial  statements.  The statements of operations data
set  forth  below for the nine months ended September 30, 1998 and 1999, and the
balance  sheet  data  as  of  September  30,  1999  have  been  derived from our
unaudited   condensed  consolidated  financial  statements  which  are  included
elsewhere  in  this  prospectus and are qualified by reference to such unaudited
condensed  consolidated  financial statements and the related notes thereto. The
interim  nine  month  data  has been prepared on a basis consistent with that of
the  audited  consolidated  financial  statements  and,  in  the  opinion of our
management,  include  all  adjustments,  consisting  only  of  normal  recurring
accruals,   necessary  for  a  fair  presentation.  Our  historical  results  of
operations are not necessarily indicative of future results of operations.



<TABLE>
<CAPTION>
                                               ---------------------------------------------------------
                                                                YEAR ENDED DECEMBER 31,
                                           ------------------------------------------------------------------
                                                    1994          1995         1996         1997         1998
In thousands, except share data            ------------- ------------- ------------ ------------ ------------
<S>                                        <C>           <C>           <C>          <C>          <C>
STATEMENTS OF OPERATIONS DATA:
Revenues:
 Product sales ...........................   $      --     $      32    $      65    $      --    $   3,266
 Research contracts ......................          98           440          817        1,122          535
                                             ---------     ---------    ---------    ---------    ---------
  Total revenues .........................          98           472          882        1,122        3,801
Expenses:
 Cost of goods sold ......................          --            --           --           --          282
 Research and development ................       3,678         6,393       15,153       17,380       19,772
 Selling, general and administrative .....       2,718         2,589        3,771        9,146       16,219
                                             ---------     ---------    ---------    ---------    ---------
  Total expenses .........................       6,396         8,982       18,924       26,526       36,273
                                             ---------     ---------    ---------    ---------    ---------
Operating loss ...........................      (6,298)       (8,510)     (18,042)     (25,404)     (32,472)
Other income and expense:
 Interest income .........................         587           568        1,308          496          705
 Interest expense ........................          --           425          324          112          256
                                             ---------     ---------    ---------    ---------    ---------
Loss from continuing operations ..........      (5,711)       (8,367)     (17,058)     (25,020)     (32,023)
Discontinued operations:
 Loss from operations ....................      (4,502)       (2,150)        (761)        (427)         (60)
 Gain on sale of chiral assets ...........          --            --           --           --        7,015
                                             ---------     ---------    ---------    ---------    ---------
Net loss .................................     (10,213)      (10,517)     (17,819)     (25,447)     (25,068)
Accretion of premium payable on
 preferred stock and warrants ............          --            --        1,013          521           25
Deemed dividend for preferred stock
 conversion discount .....................          --            --        2,778          953           --
                                             ---------     ---------    ---------    ---------    ---------
Net loss applicable to common
 stockholders ............................   $ (10,213)    $ (10,517)   $ (21,610)   $ (26,921)   $ (25,093)
                                             =========     =========    =========    =========    =========
Per share--basic and diluted:
 Loss from continuing operations .........   $   (0.73)    $   (1.04)   $   (1.81)   $   (2.05)   $   (1.98)
 Discontinued operations:
  Loss from operations ...................       (0.57)        (0.27)       (0.08)       (0.03)          --
  Gain on sale of chiral assets ..........          --            --           --           --         0.43
                                             ---------     ---------    ---------    ---------    ---------
 Net loss applicable to common
  stockholders ...........................   $   (1.30)    $   (1.30)   $   (2.29)   $   (2.20)   $   (1.55)
                                             =========     =========    =========    =========    =========
Weighted average number of shares of
 common stock outstanding ................       7,853         8,073        9,450       12,215       16,160



<CAPTION>
                                           ------------------------
                                               NINE MONTHS ENDED
                                                 SEPTEMBER 30,
                                           -------------------------
                                                   1998         1999
In thousands, except share data            ------------ ------------
                                                  (UNAUDITED)
<S>                                        <C>          <C>
STATEMENTS OF OPERATIONS DATA:
Revenues:
 Product sales ...........................  $   1,031    $  15,064
 Research contracts ......................        105        1,732
                                            ---------    ---------
  Total revenues .........................      1,136       16,796
Expenses:
 Cost of goods sold ......................         59        2,076
 Research and development ................     13,969       14,366
 Selling, general and administrative .....     11,207       17,847
                                            ---------    ---------
  Total expenses .........................     25,235       34,289
                                            ---------    ---------
Operating loss ...........................    (24,099)     (17,493)
Other income and expense:
 Interest income .........................        497          512
 Interest expense ........................         45        1,955
                                            ---------    ---------
Loss from continuing operations ..........    (23,647)     (18,936)
Discontinued operations:
 Loss from operations ....................        (60)          --
 Gain on sale of chiral assets ...........      7,015           --
                                            ---------    ---------
Net loss .................................    (16,692)     (18,936)
Accretion of premium payable on
 preferred stock and warrants ............         25           --
Deemed dividend for preferred stock
 conversion discount .....................         --           --
                                            ---------    ---------
Net loss applicable to common
 stockholders ............................  $ (16,717)   $ (18,936)
                                            =========    =========
Per share--basic and diluted:
 Loss from continuing operations .........  $   (1.47)   $   (1.12)
 Discontinued operations:
  Loss from operations ...................         --           --
  Gain on sale of chiral assets ..........       0.44           --
                                            ---------    ---------
 Net loss applicable to common
  stockholders ...........................  $   (1.04)   $   (1.12)
                                            =========    =========
Weighted average number of shares of
 common stock outstanding ................     16,062       16,903
</TABLE>


<TABLE>
<CAPTION>

                                                            -------------------------------------------------
                                                                               DECEMBER 31,
                                                    ------------------------------------------------------------------
                                                            1994         1995         1996          1997          1998
In thousands                                        ------------ ------------ ------------ ------------- -------------
<S>                                                  <C>          <C>          <C>          <C>           <C>
BALANCE SHEET DATA:
Cash and cash equivalents and marketable securities
 available for sale ..............................    $    8,500   $   11,713   $   17,815   $    13,583   $     5,124
Total assets .....................................        11,548       14,211       20,938        18,217        11,928
Long term convertible notes ......................            --        4,592        2,026            --         8,349
Accumulated deficit ..............................       (60,473)     (70,989)     (92,599)     (119,521)     (144,613)
Total stockholders' equity (deficit) .............        10,004        7,143       16,065        15,425        (3,733)



<CAPTION>

                                                    -------------
                                                     SEPTEMBER 30,
                                                              1999
In thousands                                        --------------
                                                      (UNAUDITED)
<S>                                                 <C>
BALANCE SHEET DATA:
Cash and cash equivalents and marketable securities
 available for sale .............................    $    18,624
Total assets ....................................         27,089
Long term convertible notes .....................         38,458
Accumulated deficit .............................       (163,549)
Total stockholders' equity (deficit) ............        (18,496)
</TABLE>

                                       16
<PAGE>

                     MANAGEMENT'S DISCUSSION AND ANALYSIS
               OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The  following  discussion  of our financial condition and results of operations
should  be  read  in  conjunction with our consolidated financial statements and
the related notes thereto included elsewhere in this prospectus.


OVERVIEW

We  were  organized  in  1980  as  a  unit  of  Celanese Corporation, a chemical
company.  Our  initial  mandate  was to apply biotechnology to the production of
fine  and specialty chemicals. Following the 1986 merger of Celanese Corporation
with  American  Hoechst Corporation, we were spun off as an independent company.
In  July  1987,  we completed an initial public offering of our common stock and
commenced  the  development  of  chemical  and  biotreatment  processes  for the
chemical   and  pharmaceutical  industries.  We  discontinued  the  biotreatment
operations  in  1994  to  focus  on  our  targeted  small  molecule  cancer  and
immunology  compound  development programs and our biocatalytic chiral chemistry
program.

Since  1990,  our  revenues  have  been generated primarily through research and
development   relating  to,  and  supply  of,  chirally  pure  intermediates  to
pharmaceutical  companies  for  use  in  new  drug  development and, to a lesser
degree,  from  agrochemical  research  and development contracts. However, as we
developed   our   cancer   and  immunology  programs,  sales  of  chirally  pure
intermediates  became  a less integral part of our strategic focus. Accordingly,
on  January  9,  1998, we completed the sale of our chiral intermediate business
to  Cambrex  Corporation for $15.0 million. The terms of the sale provided for a
payment  of $7.5 million at closing and an additional amount of future royalties
not  to  exceed  the  net present value on the date of contract of $7.5 million,
with  a  guarantee of certain minimum payments beginning in the third year after
closing.

In  late  September  1998,  we  commenced sales of our first commercial product,
THALOMID.

We  have  sustained losses in each year since our inception in 1986. Through the
first  nine months of 1999, we had a net loss of $18.9 million and, at September
30,  1999,  had  an  accumulated  deficit  of  $163.5 million. We expect to make
substantial  expenditures to further commercialize and develop THALOMID, develop
our  oncology  and  immunology programs and expand our chiral business. Based on
these  expenditures,  it  is  likely  that losses will continue for at least the
next six months.

Subject  to  the  risks  described elsewhere in this prospectus, we believe that
there  are significant market opportunities for the products and processes under
development  by  us.  To  address  these opportunities in a timely and effective
manner,  we  intend  to  seek out collaborations and licensing arrangements with
third  parties.  We  have  entered  into agreements covering the manufacture and
distribution  for us of certain compounds, such as THALOMID, and the development
by  us  of  processes  for  producing  chirally  pure crop protection agents for
license  to  agrochemical  manufacturers.  This development is performed through
Celgro Corporation, our wholly owned subsidiary.

We  have established a commercial organization to sell THALOMID and we currently
employ  60  persons  in  this  capacity. We intend to develop and market our own
pharmaceuticals  for  indications with accessible patient populations. For drugs
with  indications  for larger patient populations, we anticipate partnering with
other  pharmaceutical  companies.  We  also anticipate partnering with companies
for  the  development  and commercialization of our chirally pure pharmaceutical
and  agrochemical  products.  We  expect  that these arrangements typically will
include  milestone  payments, reimbursement of research and development expenses
and royalty arrangements.

Future  operating  results will depend on many factors, including demand for our
products,  regulatory  approvals of our products, the timing of the introduction
and  market  acceptance of new products by us or competing companies, the timing
of research and development milestones and our ability to control costs.


                                       17
<PAGE>

RESULTS OF OPERATIONS

Nine Months Ended September 30, 1999 and 1998

Total  revenues. Our total revenues for the nine months ended September 30, 1999
increased  to  $16.8  million  from $1.1 million in the same period of 1998. Our
revenues  for  the  1999  period consisted of product sales of THALOMID of $15.1
million  and  research  contract revenues of $1.7 million. The increase in total
revenues  in the 1999 period was primarily due to a full nine months of sales of
THALOMID  compared  with  sales  from the initial launch of THALOMID late in the
third  quarter  of  1998, a milestone payment from an existing d-methylphenidate
research agreement and research contract revenue generated by Celgro.

Cost  of  goods sold. Cost of goods sold for the nine months ended September 30,
1999  was $2.1 million compared with approximately $59,000 in the same period in
1998.  The  cost  of goods sold does not reflect raw material or formulation and
encapsulation  costs of THALOMID prior to receiving FDA approval, as these costs
were charged as research and development expenses.

Research  and  development expenses. Research and development expenses increased
3%  to  $14.4  million  in  the  nine months ended September 30, 1999 from $14.0
million  in  the  same  period  in  1998.  The  increase  in spending was due to
clinical  trial costs, primarily for ATTENADE, of $3.1 million, which was offset
by  a  decrease or reclassification of the following: regulatory consulting fees
of   approximately   $600,000;   quality  assurance  expenses  of  approximately
$633,000,  which  were  recorded  in  cost  of  goods  sold  in  1999;  external
university  research program expenses of approximately $362,000; formulation and
encapsulation  expenses  for  THALOMID  of  $1.0  million  incurred prior to FDA
approval of THALOMID; and other expenses of approximately $500,000.

Selling,   general   and   administrative   expenses.   Selling,   general   and
administrative  expenses  increased  by  59% to $17.8 million in the nine months
ended  September  30,  1999  from $11.2 million in the same period of 1998. This
increase  was  due primarily to the expansion of our sales and commercialization
organization   and   related  expenses  of  $2.4  million  and  warehousing  and
distribution  expenses,  including our S.T.E.P.S. program, of $2.9 million, both
to  support  the  commercial  sales  of  THALOMID. This increase was also due to
expenses  for  the  medical  affairs and drug safety department of approximately
$600,000,   amortization  of  expenses  related  to  our  convertible  notes  of
approximately   $500,000  and  other  miscellaneous  expenses  of  approximately
$200,000.

Interest  income and interest expense. Interest income for the nine months ended
September  30,  1999  increased  3% to approximately $512,000 from approximately
$497,000  in the same period of 1998. The increase in interest income was due to
higher  average  cash  balances  in  1999,  primarily from investment of the net
proceeds  from  our 9.0% convertible notes issued in July 1999. Interest expense
for  the  nine  months  ended September 30, 1999 increased significantly to $2.0
million  from  approximately $45,000 in the same period in 1998. The increase in
interest  expense was due to interest on our three convertible notes with coupon
rates  of  9.25%,  9.0% and 9.0% placed in September 1998, January 1999 and July
1999.

Loss  from  continuing  operations. Loss from continuing operations for the nine
months  ended  September  30,  1999 decreased by 20% to $18.9 million from $23.6
million  in the same period of 1998. The decrease was due primarily to the gross
profit  on  the sales of THALOMID and increased research contract revenue offset
by  increased  research  and development and selling, general and administrative
expenses as described above.

Discontinued  operations.  Discontinued operations in 1998 reflects the one-time
gain  on  the  sale  of  our  chiral  intermediate business of $7.0 million. The
$60,000  loss  in  the  nine months ended September 30, 1998 represents expenses
for  the  nine-day  period  preceding  the  sale.  There  were  no  discontinued
operations in 1999.

Fiscal Years Ended December 31, 1998, 1997 and 1996

Total  revenues.  In 1998, total revenues increased by 245% to $3.8 million from
$1.1  million  in  1997.  This  was  due  to  product  sales  of $3.3 million of
THALOMID,  which  was  launched  in late September 1998, offset by a decrease in
revenues  from research contracts of approximately $600,000 due to completion of
a  contract  with  a major agrochemical company at the end of 1997. Our revenues
for  1997  represented  an  increase  of 27% over 1996 revenues of approximately
$882,000.  Revenues  were  primarily  from  product  sales  in 1998 and research
contracts for the years 1997 and 1996.

Cost  of  goods  sold. Cost of goods sold in 1998 was approximately $282,000 and
relates  to  THALOMID,  our first commercial product, which was launched in late
September  1998.  The  cost  of  goods  sold  does  not  reflect raw material or
formulation   and  encapsulation  costs  of  THALOMID  prior  to  receiving  FDA
approval,  as  these  were  charged  as research and development expenses. There
were no cost of goods sold in 1997 or 1996.


                                       18
<PAGE>

Research  and  development  expenses. Research and development expenses for 1998
increased  by 14% to $19.8 million from $17.4 million in 1997. This increase was
due   to  an  increase  of  $1.5  million  primarily  for  clinical  trials  and
preclinical  toxicology  studies  for  our  chiral  pharmaceutical  program, and
approximately  $780,000  due  to  clinical  trials for potential NDA filings for
THALOMID.

Research  and  development  expenses  for 1997 increased by 15% to $17.4 million
from  $15.2 million in 1996. This increase was due to an increase in expenses of
approximately  $823,000  associated  with  our chiral pharmaceutical program and
$1.3   million  associated  with  facility  and  personnel  charges  related  to
establishing a separate location for our chiral agrochemical business.

Selling,   general   and   administrative   expenses.   Selling,   general   and
administrative  expenses  for  1998  increased by 78% to $16.2 million from $9.1
million  in 1997. This was primarily due to sales and commercialization expenses
of  $4.8  million  in  anticipation  of  the  THALOMID product launch as well as
post-launch   selling   activities.   The  increase  was  also  related  to  the
infrastructure  costs  required  to support our commercial operations, including
medical  affairs  and  drug  safety costs of approximately $928,000, information
systems  development  costs  and  additional  finance personnel of approximately
$423,000  and  other  administrative  expenses  such  as  legal,  consulting and
investor relations of approximately $900,000.

Selling,  general and administrative expenses for 1997 increased by 143% to $9.1
million  from $3.8 million in 1996. This was primarily due to the formation of a
sales  and  commercialization  organization  in  anticipation  of  the  THALOMID
product  launch  as well as an increase in some support functions resulting from
the  anticipated  transition to a commercial operation. Major increases resulted
from:  sales  and  commercialization  expenses  of  $3.4 million for sales force
recruiting  and training and other pre-launch expenses; medical affairs and drug
safety  costs  of  approximately  $425,000;  additional  finance  personnel  and
information  systems  development costs of approximately $366,000; executive and
administrative   costs   for   Celgro   of  approximately  $487,000;  and  other
administrative  expenses  such  as  legal,  consulting and investor relations of
approximately $600,000.

Interest  income and interest expense. Interest income for 1998 increased by 42%
to  approximately $705,000 from approximately $496,000 in 1997. The increase was
due  to higher average cash balances in 1998. Interest income for 1997 decreased
by  62%  from  $1.3  million  in  1996.  This decrease was attributable to lower
average  cash  balances  in  1997.  Interest  expense for 1998 increased 129% to
approximately  $256,000 from approximately $112,000 in 1997 due primarily to the
interest  expenses  associated  with  our  9.25%  convertible  notes  issued  in
September  1998.  Interest  expense  in  1997  decreased  65% from approximately
$324,000  in  1996. The decrease was due to the conversion to equity of our 8.0%
convertible debentures issued in 1995.

Loss  from  continuing operations. Loss from continuing operations increased 28%
to  $32.0  million from $25.0 million in 1997. The increase was due primarily to
spending  related  to  the  launch  of THALOMID and ongoing research programs in
oncology,  immunology  and  chiral  pharmaceuticals as described above. The loss
from  continuing operations for 1997 increased by 46% from $17.1 million in 1996
reflecting  increased  spending  in  oncology  and  immunology,  the  start of a
THALOMID  sales  and  commercialization organization and the start of our chiral
pharmaceutical development program.

Loss  from  discontinued  operations.  The  loss  from  discontinued  operations
decreased  to  approximately $60,000 in 1998 from approximately $427,000 in 1997
due  to  the  sale  of  the  chiral  intermediate  business  in January 1998. We
recorded  a  gain on the sale of the chiral intermediate assets of $7.0 million.
The   loss   from   discontinued  operations  decreased  by  44%  in  1997  from
approximately  $761,000  in  1996.  The  decrease  was  primarily a result of an
increase in revenues to $2.1 million in 1997 from $1.4 million in 1996.


LIQUIDITY AND CAPITAL RESOURCES

Since  our  inception in 1986, we have financed our working capital requirements
primarily  through  private  and public sales of our debt and equity securities,
income  earned  on  the  investment  of  the  proceeds  from  the  sale  of such
securities,  revenues  from  research  contracts,  product sales from businesses
which  we have since sold and currently from revenues from sales of THALOMID. As
of  December  31,  1999,  we  have  raised  approximately  $100.0 million in net
proceeds  from  three  public and three private offerings, including our initial
public  offering  in  July  1987.  We also issued convertible notes in September
1998, January 1999 and July 1999 with net proceeds aggregating $38.0 million.

Our  net  working  capital  as  of September 30, 1999 was $17.2 million compared
with  $2.5  million  at  December  31, 1998. The increase was attributable to an
increase  in  cash  and cash equivalents and marketable securities available for
sale  of  $13.5  million,  an  increase  in accounts receivable and inventory of
approximately $780,000, an increase in other current


                                       19
<PAGE>

assets  of  approximately  $450,000  and  a  decrease  in  accounts  payable  of
approximately   $808,000   offset   by   an  increase  in  accrued  expenses  of
approximately  $784,000.  Net  working capital consisted principally of cash and
cash   equivalents,   marketable   securities   available   for  sale,  accounts
receivable, inventory, accounts payable and accrued expenses.

Cash  and  cash  equivalents increased by $11.3 million in the first nine months
of  1999  and  marketable  securities increased $2.2 million in the same period.
This  increase  reflects the receipt in January 1999 and July 1999 of funds from
the  issuance  of  two convertible notes as well as increasing revenues from the
sales of THALOMID.

We  expect  that  our  rate of spending will increase as the result of increased
clinical   trial  costs,  increased  expenses  associated  with  the  regulatory
approval   process   and  commercialization  of  products  now  in  development,
increased  costs  related  to  the  commercialization  of THALOMID and increased
working  capital  requirements. This increased spending will be mitigated by the
collection  of  receivables  resulting from sales of THALOMID. It is anticipated
that  the increasing sales of THALOMID, as well as existing cash resources, will
be sufficient to fund operations through 2000.


YEAR 2000 COMPUTER SYSTEMS COMPLIANCE

All  of  our  computer  hardware  and  software  has been upgraded for Year 2000
compliance.  All  of  our key vendors have provided assurance that they are Year
2000  compliant.  While  there  were  no  Year  2000  related  problems  at  the
transition  in  the  Year  2000, we are maintaining our contingency plans in the
event any problems arise in the future.

The  statement  contained  in  the  foregoing Year 2000 readiness disclosures is
subject  to protection under Year 2000 Information and Readiness Disclosure Act.



                                       20
<PAGE>

                                   BUSINESS


OVERVIEW

We  are  an  independent  biopharmaceutical  company  engaged  primarily  in the
discovery,  development  and  commercialization  of orally  administered,  small
molecule drugs for the treatment of cancer and immunological  diseases.  The key
mechanisms  of action  for our drugs are  modulation  of the  overproduction  of
TNF(alpha) and inhibition of  angiogenesis.  Additionally,  our chiral chemistry
program  develops  chirally  pure  versions  of  existing   compounds  for  both
pharmaceutical and agrochemical markets.

The  FDA  approved  our  first commercialized product, THALOMID, for sale in the
United  States  in  July  1998.  The approved indication for THALOMID is for the
treatment  of  acute  cutaneous  manifestations of moderate to severe ENL and as
maintenance  therapy  for  prevention and suppression of cutaneous manifestation
recurrences.  ENL  is  an  inflammatory  complication  of  leprosy. We sell this
product  in  the United States through our 60 person sales and commercialization
organization.

Our pipeline of new drugs is highlighted  by two classes of orally  administered
therapeutic agents:  IMiDS and SelCIDs.  The IMiD class is based on the activity
of THALOMID in  modulating  the  overproduction  of  TNF(alpha)  and  inhibiting
angiogenesis. In preclinical studies, our IMiDs have demonstrated a higher level
of activity than  thalidomide.  In animal models,  these compounds did not cause
birth defects or sedation.  We completed Phase I trials in the fourth quarter of
1999 for each of our lead IMiDs. We expect that the data on these trials will be
compiled and released in the first quarter of 2000.

The second class of compounds,  SelCIDs,  is designed to modulate  TNF(alpha) by
selectively  inhibiting  PDE 4, a key  cell-signaling  enzyme.  Our  SelCIDs are
targeted to control inflammation without broad suppression of the immune system.
Phase I trials demonstrated our lead SelCID compound, CDC 801, was safe and well
tolerated.  There were no signs of nausea or  vomiting,  common side  effects of
known PDE 4  inhibitors.  CDC 801 is being  tested in a Phase II pilot,  placebo
controlled trial for the treatment of Crohn's disease. This trial is expected to
be completed in the first quarter of 2000.

In  the  third  quarter  of 1999, we announced favorable clinical results of two
Phase  III  pivotal  efficacy  trials  for  ATTENADE, a chirally pure version of
dl-methylphenidate.   dl-methylphenidate   is   commonly  marketed  as  Ritalin.
ATTENADE  is  designed to treat the symptoms of ADD and ADHD. We expect that the
final  12-month  safety trial will be completed in the first quarter of 2000 and
we plan to submit an NDA to the FDA in the second half of 2000.


                                       21
<PAGE>

CELGENE PRODUCT OVERVIEW

The  target  disease  states for, and clinical trial status of, THALOMID and our
products   and  compounds  currently  under  development  are  outlined  in  the
following table:




<TABLE>
<CAPTION>
       --------------------------------------------------------------------------------
PRODUCT        INDICATION/INTENDED USE             STATUS
- ------------   ---------------------------------   --------------------------------------------
<S>            <C>                                 <C>
THALOMID       ENL                                 Approved

               Multiple Myeloma                    Phase II trial data published and
                                                   presented at the American Society of
                                                   Hematology
                                                   Phase III pivotal trial protocol in
                                                   preparation

               Myelodysplastic Syndrome            Phase II trial ongoing and initial data
                                                   presented at the American Society of
                                                   Hematology

               Leukemia                            Multiple Phase II trials underway

               Glioblastoma(1)                     Initial Phase II trials completed
                                                   Other Phase II trials underway

               Liver Cancer                        Phase II trial underway

               Kidney Cancer                       Phase II trial underway

               Prostate Cancer(1)                  Initial Phase II trial completed
                                                   Other Phase II trials underway

               Kaposi's Sarcoma(1)                 Phase II trial completed

               Cancer Cachexia                     Initial Phase II trial completed

               Sarcoidosis                         Initial Phase II trial completed
                                                   Other Phase II trials underway

               Scleroderma                         Initial Phase II trial completed

               Recurrent Aphthous Stomatitis       Phase III pivotal trial completed
               in AIDS patients

               Crohn's disease                     Phase II trial completed and initial data
                                                   published

               Ulcerative Colitis                  Phase II trial underway

               Colon and Rectal Cancer(1)          Phase II trial announced

SelCIDs

  CDC 801      Crohn's disease                     Phase II trial underway

  CC 7085      Crohn's disease                     Preclinical toxicology

IMiDs

  CC 5013      Blood cancers                       Initial Phase I trial completed

  CC 4047      Blood cancers                       Initial Phase I trial completed

ATTENADE       Attention Deficit Disorder and      Phase III pivotal efficacy trials completed
               Attention Deficit Hyperactivity     Phase III safety trials ongoing
               Disorder
</TABLE>

- ---------------
(1) At least one study supported by the National Cancer Institute.

                                       22
<PAGE>

OVERVIEW OF ONCOLOGY AND IMMUNOLOGY

Our clinical and  commercial  focus is to produce a portfolio of highly  potent,
selective  drugs that have the  potential  to  regulate  the  overproduction  of
TNF(alpha) and are anti-angiogenic.

TNF(alpha),  produced primarily by certain white blood cells, is one of a number
of proteins called cytokines that act as chemical messengers throughout the body
to regulate  many  aspects of the immune  system.  TNF(alpha)  is  essential  to
mounting an inflammatory response, which is the normal immune system reaction to
infection  or injury that rids the body of foreign  agents and  promotes  tissue
repair.  However,  chronic  or  excessive  production  of  TNF(alpha)  has  been
implicated in a number of acute and chronic inflammatory diseases. These disease
states,  which  are  inadequately  treated  with  existing  therapies,   include
non-insulin dependent diabetes,  Alzheimer's disease,  congestive heart failure,
inflammatory bowel disease, rheumatoid arthritis,  cancer cachexia,  Parkinson's
disease, multiple sclerosis and lupus.

Traditional therapies for these disease states include  anti-inflammatory  drugs
and immunosuppressive  agents. These therapies often fail to achieve significant
clinical  benefits  and can cause  serious  side effects such as severe drops in
certain blood component counts, liver toxicity, osteoporosis, teratogenicity and
various endocrine abnormalities. We believe that selective control and reduction
of  TNF(alpha)   represents  a  promising  new  strategy  for  treating  chronic
inflammatory  diseases.  In  pursuit  of this  strategy,  two broad  classes  of
compounds have been investigated: proteins and small synthetic molecules.

Anti-TNF(alpha) proteins,  including  anti-TNF(alpha)  antibodies and TNF(alpha)
soluble receptors,  have demonstrated  efficacy in the treatment of such chronic
inflammatory diseases as rheumatoid arthritis and Crohn's disease. While initial
doses of these  anti-TNF(alpha)  proteins  have  been  well  tolerated  and have
reduced disease  activity in clinical  studies,  these proteins  exhibit certain
shortcomings linked to their nature as proteins. First, they are large molecules
that must currently be injected or infused.  Second, the period of efficacy of a
given dosage of a protein-based  drug can decline with repeated  administration,
rendering  protein-based drugs more suitable for treatment of acute pathological
conditions rather than chronic disease states. This limitation is due in part to
increasing production by a patient's immune system of antibodies that neutralize
administered proteins.

There are a number of large molecule,  protein-based  therapeutic products under
development  by other  companies  for  TNF(alpha)  modulation.  One  product has
received  approval  from  the FDA for  the  treatment  of  Crohn's  disease  and
rheumatoid   arthritis,   and  another  has  received  approval  for  rheumatoid
arthritis.  Synthetic small molecule drugs, however, if successfully  developed,
may prove to be preferable in the  treatment of chronic  inflammatory  diseases,
due to factors  such as oral  dosing,  lower cost of therapy  and  avoidance  of
undesirable  immune  response  that  results in adverse side effects and reduced
efficacy.  We believe that our small molecule  immunotherapeutic  compounds have
the potential to selectively modulate TNF(alpha) while affording these benefits.

In  addition,  research has indicated that our small molecule drug, THALOMID, is
anti-angiogenic.  Angiogenesis  is  the  fundamental biological process by which
new  blood  vessels  are  formed.  Cancer cells require oxygen and nutrients and
initiate  a  biochemical  mechanism that stimulates angiogenesis which, in turn,
provides  the  cancerous  cells  with  the  blood supply that they need to grow.
Inhibition  of angiogenesis could adversely affect the graft of a tumor and be a
potential  anti-cancer  therapy.  This therapy could be also used in conjunction
with  radiation or more traditional chemotherapeutic agents. Currently, a number
of  anti-angiogenic  agents  are  being  developed  by  a  number  of companies.
However,  we  believe that THALOMID is the only product on the market that has a
direct  anti-angiogenic effect. Moreover, preliminary research suggests that our
two  new  classes  of small molecule immunotherapeutic compounds -- one of which
is based on thalidomide's activity -- may be anti-angiogenic.


THALOMID

In  July  1998, we received FDA approval to market THALOMID for treatment of ENL
and  the product was launched in late September 1998. THALOMID is the first drug
approved  under a special "Restricted Distribution for Safety" regulation and is
distributed  through  our S.T.E.P.S. program. Our program is designed to support
the  safe  and  appropriate  use  of  THALOMID  and  has been made a part of the
approved  labeling  for  THALOMID.  We are currently developing THALOMID for the
treatment  of a variety of serious disease states for which we believe there are
currently  no  adequate  approved  therapies.  Our current intent is to seek FDA
approval  for  THALOMID  for  at least one cancer of the blood, such as multiple
myeloma, one solid tumor cancer and an AIDS-related indication.

The   immunological   and  anti-angiogenic  properties  of  THALOMID  are  being
investigated  as  the  basis for treatment of a variety of oncological diseases,
and  a  number  of  trials  are  ongoing,  some  in cooperation with the NCI, to
evaluate  the  potential  of  the  drug  in  cancer.  Key investigations include
multiple myeloma, which was the subject of an article and


                                       23
<PAGE>

editorial  in  the  November  18,  1999  issue  of  The  New  England Journal of
Medicine,  Volume 341, Number 21, and glioblastoma multiforme, for which initial
data  were  presented  in November 1999 at the Chemotherapy Foundation Symposium
XVII  in  New  York.  Additional  presentations  have  been made at the 41st ASH
symposium in December 1999.

Our work with  thalidomide  was originally  based on a scientific  collaboration
with  The  Rockefeller   University's  Laboratory  of  Cellular  Physiology  and
Immunology.  In the  early  1990s,  researchers  at The  Rockefeller  University
discovered  that  thalidomide  is  a  selective  modulator  of  TNF(alpha)  and,
therefore,  could be of potential benefit in many serious immune-related disease
states, including cachexia and other AIDS-related  conditions.  We believe that,
in serious and debilitating  disease states, the risk of birth defects and other
potential  side  effects  related to  thalidomide  is  outweighed  by the drug's
potential  clinical  benefits.  The  Rockefeller  University  has  granted to us
certain  exclusive rights and licenses to manufacture,  use and sell thalidomide
for treating the toxicity  associated with high  concentrations of TNF(alpha) in
septic  shock,  cachexia and  HIV-related  disease  states.  Researchers  at the
Children's  Medical  Center,   which  is  affiliated  with  Harvard  University,
discovered  that  thalidomide  is  anti-angiogenic  and  filed  patents  on this
utility.  These patents, some of which have not issued in the United States, are
exclusively  licensed to EntreMed,  Inc. We were granted an exclusive sublicense
to all of EntreMed's thalidomide patents in December 1998.

As  a result of our own applications and designations acquired from EntreMed, we
now  have  Orphan  Drug designations from the FDA for THALOMID covering: primary
brain  malignancies;  HIV associated wasting syndrome; severe Recurrent Aphthous
Stomatitis,   or   RAS,  in  severely,  terminally  immunocompromised  patients;
clinical  manifestations  of  mycobacterial  infections  caused by Mycobacterium
tuberculosis  and  non-tuberculous  mycobacteria; ENL; multiple myeloma; Crohn's
disease  and  Kaposi's sarcoma. If the FDA approves any of these indications for
THALOMID,  we  will  be  granted a seven-year period of exclusivity during which
time  the  FDA  is  prohibited,  except  under  some  conditions, from approving
another version of thalidomide for the approved indication.

Thalidomide  was  developed  initially  as  a  sedative,  and  was  also  widely
prescribed  by  doctors  in Europe in the late 1950s and early 1960s to pregnant
women  for  relief  of  morning  sickness. After severe birth defects were later
observed  with  use of the drug, it was virtually removed from the world market.
Thalidomide  was  later  discovered to have therapeutic effects in the treatment
of  ENL, a disease that is rare in the United States but common in many parts of
the  developing  world.  Although  the  FDA  had never approved the marketing of
thalidomide,  the  U.S.  Public  Health  Service  has dispensed the drug for the
treatment  of  ENL for the past 25 years. We note that thalidomide's history may
limit market acceptance of THALOMID.


Oncology

Cancer  tissue  has  many  blood  vessels.  This  observation  has  led  to  the
realization  that  growth  of  blood  vessels  is  essential  for  tumor growth,
invasion  and  metastasis.  Specifically,  developing  solid  primary tumors are
believed  to  remain  clinically insignificant unless they can arrange to obtain
nourishment  from  their host. Biochemically, an invasive tumor acts by altering
a  complex  system  of  factors  causing the formation of new blood vessels from
existing  ones.  Almost  three  decades  ago,  it  was  proposed that this tumor
angiogenesis  could  be  a  target  of cancer therapy. Anti-angiogenic compounds
were  believed  to be able to work by reducing or halting remaining tumor growth
and  could  also  be  used in conjunction with more traditional chemotherapeutic
agents.  Thalidomide  was  discovered  to  be  anti-angiogenic at the Children's
Medical Center in Boston.

We  are currently working with the NCI and a number of clinical investigators to
assess  the  potential  of  THALOMID in the treatment of various cancers. In the
first  12  months after THALOMID was commercially launched in the United States,
approximately  70%  of the product's prescriptions were in oncology, as reported
by prescribers on our S.T.E.P.S. program enrollment surveys.

Multiple  Myeloma. Multiple myeloma is a malignant proliferation of plasma cells
and  plasmacytoid cells. It is the second most common blood borne malignancy and
is  invariably  fatal.  According  to  the Leukemia Society of America, multiple
myeloma  accounts for about 13% of blood borne disease and affects approximately
40,000   people  in  the  United  States.  The  incidence  of  this  disease  is
approximately  four  per  100,000,  and  approximately 14,400 cases are reported
annually  with  approximately  11,000  deaths  associated with the disease every
year.

Clinical  research published in the November 18, 1999 edition of The New England
Journal  of  Medicine,  Volume  341,  Number  21,  reported  results  of a study
conducted  at  the  University of Arkansas on the use of THALOMID in 84 multiple
myeloma  patients  with  advanced stage disease and histories of extensive prior
chemotherapeutic  interventions,  radiation  treatments and multiple bone marrow
transplants.  This  Phase  II study found that 32% of the patients had a partial
response


                                       24
<PAGE>

and  10%  of  the  patients had a complete or nearly complete remission based on
decreases  in  paraprotein, the myeloma protein in serum, or Bence Jones protein
in  urine,  important  markers  of the progression of the disease. Clinical data
from  180  patients in this study was presented at the December 1999 ASH meeting
by  researchers  at  the  University  of  Arkansas  who reported that 36% of the
patients  achieved  a  25% reduction in tumor burden. Eighteen patients achieved
paraprotein  response  of  at  least  90%,  14  patients achieved at least a 75%
paraprotein  response,  16 patients achieved at least a 50% paraprotein response
and  four  patients  achieved  a complete response. Side effects reported by the
investigators  were  constipation,  weakness/fatigue and somnolence. A number of
additional  presentations and posters presented confirmatory evidence at the ASH
meeting  regarding the efficacy of THALOMID. In September 1999, similar findings
were  reported  at  the  International  Myeloma Workshop in Stockholm, Sweden on
trials  conducted at Cedars-Sinai Medical Center, Los Angeles. In this Phase II,
open  label  study  of  20  relapsing  or  progressive multiple myeloma patients
utilizing  low-dose  THALOMID  administered over an eight-week trial period, 30%
of  patients  experienced  a greater than 50% reduction of tumor burden. Further
data  confirming  earlier  trials  was  presented at the Chemotherapy Foundation
Symposium  XVII  in  November 1999 in New York on 15 refractory patients treated
at  Saint  Vincents  Medical  Center, New York in which there was observed a 67%
overall response with THALOMID alone or in combination with chemotherapy.

In  the  12  months following the launch of THALOMID, as reported by prescribers
on  our  S.T.E.P.S. program enrollment surveys, approximately 30% of total usage
was  in multiple myeloma. Based on this information and on the growing volume of
clinical  trial data, our plan is to develop a regulatory/clinical program based
on  what  has  been  learned  from these studies and file a supplemental NDA for
THALOMID for the treatment of multiple myeloma.

Glioblastoma  Multiforme.  Glioblastomas  are  the  most common brain tumors and
account  for  50%  of all gliomas, an aggressive form of brain cancer. The usual
treatment  of  high-grade  gliomas  is  surgical  removal  followed by radiation
therapy.

Studies  at  the  New  York University School of Medicine and at the Dana Farber
Institute  have  demonstrated  the  potential for thalidomide as a treatment for
glioblastoma  multiforme.  Phase  I/II  data  from the New York University trial
were  presented  in  November 1999 at the Chemotherapy Foundation Symposium XVII
in  New  York.  THALOMID  in combination with carboplatin was administered to 71
patients  with  recurrent glioblastoma multiforme. At the maximum tolerated dose
of  THALOMID,  53  of  the  patients  were  evaluated  for  efficacy,  with  70%
experiencing   responses,   two   with   partial   responses,  35  with  disease
stabilization.   The   trial's   most   commonly   reported  side  effects  were
constipation  and  drowsiness.  A  Phase  III trial will assess whether patients
benefited  because  of  the higher carboplatin doses or if there was any synergy
between  thalidomide  and  carboplatin.  Additionally, a Phase II trial has been
initiated  in  collaboration  with the NCI's Radiation Therapy Oncology Group to
investigate  the  effect  of  THALOMID  and  radiation  as  co-therapy  for  the
treatment of glioblastoma.

Other  Oncology  Indications. In addition to glioblastoma multiforme, the NCI is
currently  investigating  THALOMID  in  clinical trials on prostate, colorectal,
head  and  neck  and  non-small  cell lung cancer. Other trials such as those in
liver  cancer,  kidney  cancer  and leukemia are being run by key investigators.
Recently,  researchers  in London reported that continuous, low-dose thalidomide
is  useful  as  an agent in patients with advanced cancers as a palliative. That
study  showed  that  three  of  18  patients  with  kidney  cancer also showed a
response  benefit  and  three  patients  had  stabilization of their disease for
periods  of  up  to  six  months.  In  addition,  four  of  17 melanoma patients
experienced  stable  disease  for up to six months. According to a report in the
medical  journal  Lancet,  follow-up  studies using higher doses have also shown
"encouraging  results" in patients with kidney cancer. These researchers are now
testing  thalidomide  in  combination  with  interferon or interleukin 2 in this
group.  Similarly,  the  NCI  reported  trial  results in which 63 patients were
treated  with either a low dose or a high dose of thalidomide. Approximately 53%
of  the  low  dose  and  68%  of the high dose patients had declines in prostate
specific  antigen, a recognized marker for prostate cancer. If successful, these
studies  would establish proof of principle, leading to the design of additional
trials, including pivotal studies.


Immunology

THALOMID  has been shown to impact the immune  system both in vitro and in vivo.
Examples of such  biological  activities  include the  inhibition of TNF(alpha),
stimulation  of the  anti-inflammatory  cytokine  IL-10 and activation of T-cell
function. These types of activities could prove to have therapeutic benefit in a
variety of inflammatory,  infectious and autoimmune diseases.  The two key areas
of  investigation  at present  involve  inflammatory  bowel  disease and serious
complications   associated   with   HIV/AIDS.   In  addition,   other  areas  of
investigation  include  sarcoidosis,  an inflammation of body tissue which often
attacks the lungs and lymph nodes, and scleroderma, a chronic tissue disorder.


                                       25
<PAGE>

Erythema  Nodosum  Leprosum.  ENL  is  a  complication  of  leprosy,  a  chronic
bacterial  disease.  Although  the  disease  is  relatively  rare  in the United
States,  leprosy afflicts millions worldwide. ENL occurs in about 30% of leprosy
patients  and  is  characterized by cutaneous lesions, acute inflammation, fever
and  anorexia.  On  July  16,  1998, we received approval from the FDA to market
THALOMID for the treatment of ENL.

Inflammatory  Bowel  Disease. According to the Crohn's and Colitis Foundation of
America,  there are approximately one million Americans with active inflammatory
bowel  disease.  Inflammatory  bowel disease is characterized by serious chronic
inflammation  of  the wall or any part of the gastrointestinal tract and results
in  pain,  bloating  and  diarrhea.  In  addition,  the chronic inflammation may
result   in   abscesses   and  fistula  formation.  The  most  serious  form  of
inflammatory  bowel disease is known as Crohn's disease with an estimated 70,000
to  125,000 U.S. patients diagnosed with active moderate to severe manifestation
of the disease.

A  Phase  II  pilot study using THALOMID in patients with severe Crohn's disease
has  been  concluded  at  the  Cedars-Sinai  Medical  Center,  Los  Angeles, and
reported  in  the  journal Gastroenterology. About 70% of the patients suffering
from  moderate  to  severe  Crohn's disease who completed at least five weeks of
the  12-week  trial demonstrated a response when treated with low dose THALOMID,
with  20%  of  these  patients experiencing remission. All patients were able to
reduce   their   steroid   regimen  by  at  least  50%,  with  44%  of  patients
discontinuing  steroids. Data from this trial suggests that THALOMID may provide
clinical  benefit  and  potentially  reduce the need for steroid treatment. This
combination  of effects could mean improvement over current therapeutic options.
A  similar  Phase  II  pilot  study  has  been initiated at Cedars-Sinai Medical
Center  using  THALOMID  for  chronically  active  ulcerative  colitis, which is
another  form  of  inflammatory  bowel  disease.  Estimates of the prevalence of
ulcerative  colitis  in  the  United  States generally range between 250,000 and
500,000.  Recent  preliminary  data  has  shown  that  eight of 11 patients with
intractable bowel disease benefited from THALOMID.

HIV/AIDS.  Recurrent  Aphthous  Stomatitis,  or  RAS,  is a complication of AIDS
characterized  by  lesions  of  the  oral cavity, esophagus and gastrointestinal
tract  and  may  interfere with normal eating. We believe RAS currently afflicts
an  estimated  5,000  AIDS  patients in the United States. Positive results have
been  reported  in  a  study  conducted by the AIDS Clinical Trials Group of the
National  Institutes  of  Health using a formulation of thalidomide manufactured
by  a  third  party. In mid-1997, we began a pivotal clinical trial involving 84
patients  for the evaluation of THALOMID in the treatment of RAS, using the same
principal  investigator  as  the  AIDS  Clinical  Trials Group study. We will be
analyzing  this  clinical  trial data in 2000 with a view toward the possibility
of a supplemental NDA submission to the FDA.


S.T.E.P.S. Program

Working  with  the  FDA  and  other  governmental  agencies  as  well as certain
advocacy  groups,  we  designed  and  implemented  our  S.T.E.P.S.  program, the
objective   of  which  is  the  safe  and  appropriate  use  of  THALOMID.  This
proprietary  program  includes  comprehensive  physician, pharmacist and patient
education.  Female  patients  are  required  to  use contraception and are given
pregnancy  tests regularly. All patients are also subject to other requirements,
including   informed  consent  and  participation  in  a  confidential  outcomes
registry  managed  on  our  behalf  by  an academic epidemiology research group.
Physicians  are  also  required  to  comply  with the educational, contraception
counseling,  informed  consent  and  pregnancy testing and other elements of the
program.  Dispensing pharmacists are required to confirm that the physician is a
registered  participant  in  the  program,  and  that  the patient has signed an
informed  consent.  Automatic  refills  are  not permitted under the program and
each  prescription  may  not  exceed  four  weeks  dosing. A new prescription is
required each month.


Sales and Commercialization

We  have  established  an  organization  of approximately 60 persons to sell and
commercialize  THALOMID.  These  individuals have considerable experience in the
pharmaceutical   industry   and   many  have  experience  with  oncological  and
immunological   products.   We   expect   to   expand  our  THALOMID  sales  and
commercialization  group to support products we develop to treat oncological and
immunological  diseases.  We  intend  to market and sell the products we develop
for  indications with accessible patient populations. For drugs with indications
with   larger   patient   populations,   we  anticipate  partnering  with  other
pharmaceutical  companies.  In  addition,  we  are  positioned to accelerate the
expansion  of  these sales resources as appropriate to take advantage of product
in-licensing  and  product  acquistion  opportunities.  We  intend  to establish
commercial  relationships  with  selected companies in other countries to market
THALOMID.

                                       26
<PAGE>

Manufacturing

THALOMID  is  formulated and encapsulated for us by Penn Pharmaceuticals Ltd. of
Great  Britain in an FDA approved facility devoted exclusively to the production
of  THALOMID  capsules.  Both  the bulk manufacturing facility that produces the
drug  substance  for  THALOMID and the Penn facility have been certified as cGMP
compliant.  In certain instances, we may be required to make substantial capital
expenditures  to  access additional manufacturing capacity. In addition, we have
established  a contract with another cGMP certified bulk drug substance supplier
for  THALOMID  that will begin in 2001 once the regulatory process is completed.
We  are  also  actively  seeking an alternate manufacturer to provide additional
capacity  for the formulation and encapsulation of THALOMID and expect that this
will be concluded in 2000.


IMIDS

We  have  designed  and  synthesized  a  number of novel structural analogues of
thalidomide  called  IMiDs  which have been demonstrated in in vitro tests to be
substantially  more potent than thalidomide. There can be no assurance, however,
that  the  same effect can be duplicated in humans. Animal models have suggested
that  our  IMiDs  do  not  cause  the birth defects associated with thalidomide.
Research  on  these  compounds  has identified two clinical trial candidates and
each  has  advanced  into  a  Phase  I  trial.  Research  continues on follow-on
compounds  with  enhanced  immunological and anti-angiogenic activity. IMiDs may
have  potential  for  treating  conditions where there is a deficiency in T-cell
activity,  such  as  viral  diseases  including  HIV-related  diseases,  or  for
enhancing   potential  IL-12  mediated  anti-tumor  activities.  In  preclinical
studies,  our  lead IMiD compound has been shown to inhibit interleukins 1-beta,
6  and  12  while stimulating the production of interleukins 10 and 2 as well as
interferon  gamma.  The  activity  of  T-cells is enhanced by the compound up to
1,000  times  more  than  with thalidomide. We expect to advance at least one of
the  lead  IMiDs,  CC  5013  or  CC 4047, into a Phase II pilot trial in a blood
cancer  during 2000. The U.S. Patent and Trademark Office has issued composition
of matter and use patents to us relating to our IMiDs.


SELCIDS

We have  designed,  synthesized  and  tested a large  number of  SelCIDs.  These
compounds  have  demonstrated  the ability to be highly  specific  inhibitors of
TNF(alpha)  overproduction in in vitro bioassays of human cells.  SelCIDs appear
to  have a  specific  inhibitory  effect  on  PDE  4,  which  is  linked  to the
overproduction  of TNF(alpha).  Studies have determined that many of the SelCIDs
decrease  synthesis  of  TNF(alpha)  through  selective  inhibition  of  PDE  4.
Preclinical  and animal  tests have  shown this class of  compounds  to be up to
10,000 times more active with a longer half-life than THALOMID.  We believe that
control of TNF(alpha) at its source, versus simple removal of circulating levels
of  the  cytokine,   may  facilitate  more  effective   therapy  without  immune
suppression.  There can be no  assurance,  however,  that the same effect can be
duplicated in humans.

Our  lead  SelCID, CDC 801, was found to be well tolerated in two Phase I trials
completed  in  1999  in  the  United  Kingdom.  A  Phase II pilot trial for this
compound  in  Crohn's  disease  commenced  in  1999  at the Cedars-Sinai Medical
Center  and  results  are expected in the first quarter of 2000. In addition, we
expect  to  initiate a Phase II pilot trial for CDC 801 in a blood cancer during
2000.  Other  SelCIDs  have  been  identified  and the most advanced of these is
undergoing  toxicological  evaluation in preparation for the initiation of Phase
I  trials.  Unlike many therapeutics which inhibit PDE 4, SelCIDs have not shown
any  evidence  of  acute  nausea  and  vomiting in patients. The U.S. Patent and
Trademark  Office  has  issued  to  us  composition  of  matter  and use patents
relating to our SelCIDs.


CHIRAL CHEMISTRY

Many   human   pharmaceuticals   and   agrochemicals   exist  in  two  different
three-dimensional  configurations  that  are identical in chemical structure but
are  mirror  images of each other. These conformations, known as enantiomers, or
isomers,  generally  interact  differently  with biological targets. In clinical
applications,  one  isomer  may  result  in  the  desired  therapeutic effect by
stimulating  or  inhibiting  a  targeted  biological  function,  while the other
isomer  may  be  inactive  or  cause  undesirable  side  effects. In contrast to
racemic  compositions  which  contain  both  isomers,  the  use of chirally pure
pharmaceuticals  can  result  in  significant  clinical benefits such as reduced
toxicity  and  increased  efficacy.  In  agrochemical  applications,  the use of
chirally  pure chemicals can result in a substantially reduced volume of product
required   to   achieve   the  desired  benefit,  thereby  potentially  lowering
manufacturing  costs  and  reducing  the  environmental  burden as compared with
racemic chemicals.

Our  biocatalytic  process  enables  the  efficient  production of chirally pure
compounds.  This  patented  process  is  based  primarily  on the use of enzymes
called  aminotransaminases,  which  are  optimized  by  us  through a variety of
techniques  including genetic engineering. These enzymes catalyze the production
of  only  the  desired  stereoisomer  of  a  chiral  compound and can be used in
conventional chemical synthesis reactors at room temperature.


                                       27
<PAGE>

Our  biocatalytic process for producing chirally pure compounds differs from the
more  common  approach  of  producing racemic mixtures followed by separation of
the  desired  stereoisomer through resolution techniques such as crystallization
or  chromatography.  These  traditional  approaches  to  producing chirally pure
compounds  can  be  cumbersome, result in low yields, use substantial amounts of
raw  materials  and  involve  the  disposition  of  waste  product.  Traditional
approaches  also are generally less economical than our process. We believe that
our  biocatalytic process can be applied to the manufacture of a wide variety of
organic chemicals.

We  believe  there  is  a  significant  incremental  opportunity  in  developing
selected,  chirally  pure  versions  of approved drugs currently sold in racemic
form.  Compounds that have been approved and marketed have a significant body of
information regarding their safety and efficacy and consequently:

o    the cost and duration of preclinical evaluations and clinical trials may be
     reduced if  reference  may be made to data used in the course of  obtaining
     regulatory approval for the racemic parent compound;

o    the risk of not obtaining regulatory approval may be reduced; and

o    marketing risks may also be reduced due to the  established  market for the
     parent compound.

We  have  made  significant  progress  over  the past year in the development of
ATTENADE,  the  chirally  pure version of Ritalin. We have also made significant
progress  in  the  development and production of chirally pure agrochemicals. We
believe  that the agrochemical market presents a substantial opportunity because
many  agrochemicals  produced  in racemic form could be manufactured in chirally
pure form.




ATTENADE

We  have  completed  two  pivotal  Phase III efficacy trials for ATTENADE. These
trials  found that ATTENADE met all efficacy parameters for controlling symptoms
of  ADD  and  ADHD  in  school-age children. Drugs containing dl-methylphenidate
such  as  Ritalin  have been used for decades for the treatment of ADD and ADHD.
We  believe  that  one  million  children in the United States were treated with
dl-methylphenidate  and other psychostimulants in 1998. Total U.S. sales in 1998
of  drugs  used  to  treat  the symptoms of ADD and ADHD were approximately $500
million.

More  than  200  children  participated in our pivotal trials. Both multi-center
trials  compared  ATTENADE  to  placebo;  the second trial directly compared the
efficacy  of  both  ATTENADE  and  dl-methylphenidate to placebo. As compared to
placebo,  ATTENADE  demonstrated  a statistically significant longer duration of
action  than  dl-methylphenidate.  ATTENADE  controlled  the symptoms of ADD and
ADHD  at  all  times  measured  in  the  study  while dl-methylphenidate did not
control  the  symptoms  at  the last measurement. In both trials, behavioral and
objective   measures   were   examined.   ATTENADE  had  favorable  scores  over
dl-methylphenidate  in  all  parameters  measured.  The  results  of the primary
efficacy  analysis indicated that ATTENADE was significantly more effective than
placebo  as  evaluated  by  a behavioral scale, signifying an improvement in the
clinical  status  of the children. The results of the second trial confirmed the
drug's  efficacy  and  indicated  a  significantly longer duration of action for
ATTENADE  compared  to dl-methlyphenidate as measured by a behavioral scale. The
Phase  III safety trial is scheduled for completion in the first quarter of 2000
and  an  NDA  submission  is anticipated later in the year. Clinical trials on a
pulsed release formulation are planned to commence in the first half of 2000.

We  are  in discussions regarding partnerships for ATTENADE in the United States
and  Europe.  In Canada, where it is awaiting registration, ATTENADE is licensed
to  Biovail Corporation, which purchased $2.5 million dollars worth of our stock
and  will  pay  to  us licensing fees, milestone payments and royalties. We have
been  issued  patents for the use of ATTENADE for the treatment of ADD and ADHD,
and  for  the once-a-day administration of methylphenidate drugs in a controlled
or   pulsed   release   formulation   that   includes  both  the  chirally  pure
d-methylphenidate  and  the  racemic  form.  In  addition,  we  have been issued
process patents covering our manufacturing process for the active substance.




Chirally Pure Agrochemicals

Celgro   is  applying  our  proprietary  biocatalytic  synthesis  technology  to
agrochemicals.  Celgro's  approach  is  to  work  with agrochemical companies to
adapt  our  biocatalytic technology to the manufacture of chirally pure versions
of  their  existing  crop  protection product and then license the technology to
these  companies  in  exchange  for  royalties. Celgro will also seek to develop
chirally  pure versions of existing agrochemicals on its own and then enter into
license agreements with third


                                       28
<PAGE>

parties,  who would manufacture and sell the agrochemicals. We expect that these
arrangements   typically  will  include  milestone  payments,  reimbursement  of
research  and  development  expenses  and  royalty arrangements. We have entered
into   research   and  development  agreements  with  two  leading  agrochemical
companies and initiatives are underway to secure additional collaborations.

We  also  believe  that  our  chiral  technology can be enabling in agrochemical
applications  because  it has the potential to significantly lower manufacturing
costs  compared  to  conventional  technologies  and  other chiral technologies.
Compared  to  our  biocatalytic  process, conventional technologies require more
raw  materials and greater plant capacity to produce the same effective quantity
of  product, while other chiral technologies require specialized equipment, more
expensive  chiral  agents,  more  raw material and greater capacity for handling
hazardous  wastes  produced  in  the  separation  process.  In  addition,  it is
anticipated  that  the required application amount of a chirally pure form of an
agrochemical  could  be substantially less than the racemic form and achieve the
same  or  better  results,  thereby reducing environmental burden. Agrochemicals
are  highly  price  sensitive  and,  therefore, a process that produces chirally
pure products at significant cost savings could be in substantial demand.



PATENTS AND PROPRIETARY TECHNOLOGY

Patents  and  other  proprietary rights are important to our business. It is our
policy  to  seek  patent  protection  for  our inventions, and also to rely upon
trade  secrets,  know-how,  continuing  technological  innovations and licensing
opportunities to develop and maintain our competitive position.

Under an agreement with The  Rockefeller  University,  we have obtained  certain
exclusive rights and licenses to manufacture,  have  manufactured,  use and sell
products that are based on compounds  that were  identified in research  carried
out by The  Rockefeller  University and us, that have activity  associated  with
TNF(alpha).  The  Rockefeller  University  has  identified  a  method  of  using
thalidomide  and certain  thalidomide-like  compounds to treat certain  symptoms
associated  with  abnormal   concentrations   of  TNF(alpha),   including  those
manifested in septic shock, cachexia and HIV infection. In 1995, The Rockefeller
University was issued a U.S. patent which claims such methods.  This U.S. patent
expires in 2012 and is included in the patent rights exclusively  licensed to us
under the license from The  Rockefeller  University.  However,  The  Rockefeller
University did not seek corresponding patents in any other country in respect of
this invention.  The Rockefeller  University has filed an additional U.S. patent
application and an international  patent application relating to the activity of
thalidomide  related to  interleukin-12.  Under the license from The Rockefeller
University,  we  were  obligated  to  pay  certain  specified  royalties  to The
Rockefeller   University   on  net  sales  of  licensed   products  for  covered
indications.  In November  1999,  we agreed with The  Rockefeller  University to
substitute  a lump sum  payment  and  issue  stock  options  to The  Rockefeller
University and the inventors in lieu of the royalties  previously  payable under
the license. The license from The Rockefeller University is coterminous with the
last to expire of the  licensed  patents and is  terminable  by The  Rockefeller
University  only in the event of a breach of the  agreement's  terms by us which
breach shall fail to be remedied for more than sixty days after notice  thereof.
Any  termination  of the license from The  Rockefeller  University  could have a
material  adverse  effect on our  business,  financial  condition and results of
operations.

In  1998,  we  were  granted  an  exclusive sublicense to all of the thalidomide
patents  and  patent applications worldwide, exclusively licensed to EntreMed by
the   Children's   Medical  Center  Corp.,  which  is  affiliated  with  Harvard
University,  related  to  the  anti-angiogenic action of thalidomide. Three U.S.
patents  issued  to  Children's  Medical  Center  Corp.  will  expire  in  2014.
Corresponding   foreign   patent   applications   and   additional  U.S.  patent
applications  are  still  pending. Further, we have also exclusively sublicensed
pending  U.S.  and foreign patent applications related to the use of thalidomide
in  combination  with  other  therapeutic agents. There can be no assurance that
additional  patents will issue, or that if patents issue, that such patents will
provide  us with significant proprietary protection or commercial advantage. The
license  from  EntreMed  is  coterminous with the last to expire of the licensed
patents  and  we  must  pay  royalties  for  at  least  12  years from our first
commercial  sale in the United States. The EntreMed license is terminable in the
event  of  a  breach  by  us, which breach shall fail to be remedied for 60 days
after  notice thereof. Any termination of the license from EntreMed could have a
material  adverse  affect  on  our  business, financial condition and results of
operations.

We  have  been issued a total of 36 U.S. patents and have filed an additional 15
U.S.  patent  applications. Of the issued patents, 14 relate to our oncologic or
immunologic   compounds  and  uses  and  six  are  directed  to  methylphenidate
therapeutic  compositions  and  processes.  Our U.S. patents expire between 2001
and  2019.  We  have  filed  patient  applications  and  in  some instances have
obtained  patents  in  certain other countries which correspond to some, but not
all  of  our  U.S.  patents.  We  expect to continue to file patent applications
covering the use of our proprietary inventions.


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<PAGE>

Prior  to  the  enactment  in  the  United  States  of new laws adopting certain
changes  mandated  by  the General Agreement on Tariffs and Trade, the exclusive
rights  afforded  by  a  U.S. patent were for a period of 17 years measured from
the  date of grant. Under these new laws, the term of any U.S. patent granted on
an  application  filed  subsequent  to June 8, 1995 will terminate 20 years from
the  date  on which the patent application was filed in the United States or the
first  priority  date,  whichever  occurs  first.  Future  patents granted on an
application  filed before June 8, 1995 will have a term that terminates 20 years
from such date, or 17 years from the date of grant, whichever date is later.

Under  the  Drug  Price  Competition  and Patent Term Restoration Act of 1984, a
U.S.  product  patent  or  use patent may be extended for up to five years under
certain  circumstances to compensate the patent holder for the time required for
FDA  regulatory  review  of  the product. The benefits of this act are available
only  to the first approved use of the active ingredient in the drug product and
may  be  applied  only to one patent per drug product. There can be no assurance
that we will be able to take advantage of this law.

Our  success will depend, in part, on our ability to obtain and enforce patents,
protect  trade  secrets,  obtain  licenses  to technology owned by third parties
when  necessary  and  conduct  its  business  without infringing the proprietary
rights  of  others.  The  patent  positions  of pharmaceutical and biotechnology
firms,  including  ours,  can be uncertain and involve complex legal and factual
questions.  In  addition,  the  coverage  sought  in a patent application can be
significantly  reduced before the patent is issued. Consequently, we do not know
whether  any  of  our  owned or licensed pending applications will result in the
issuance  of  patents  or,  if any patents are issued, whether they will provide
significant  proprietary  protection  or  commercial  advantage, or whether they
will  be  circumvented or infringed upon by others. Since patent applications in
the  United  States  are  maintained  in  secrecy  until patents issue and since
publication  of  discoveries  in  the  scientific or patent literature often lag
behind  actual discoveries, we cannot be certain that we, or our licensors, were
the  first  to  make  the  inventions  covered  by  each  of  the pending patent
applications  or  that  we,  or  our  licensors,  were  the first to file patent
applications  for  such  inventions. In the event a third party has also filed a
patent  for any of its inventions, we, or our licensors, may have to participate
in  interference proceedings declared by the U.S. patent and Trademark Office to
determine  priority  of  invention,  which  could  result  in the loss of a U.S.
patent  or  loss  of  any  opportunity  to secure U.S. patent protection for the
invention.  Even  if  the eventual outcome is favorable to us, such interference
proceedings  could  result  in  substantial  cost  to  us. Prosecution of patent
applications  and  litigation to establish the validity and scope of patents, to
assert  patent  infringement  claims against others and to defend against patent
infringement  claims by others can be expensive and time-consuming. There can be
no  assurance  that,  in  the  event that claims of any of our owned or licensed
patents  are  challenged  by  one  or  more  third  parties, any court or patent
authority  ruling  on  such challenge will determine that such patent claims are
valid  and  enforceable. An adverse outcome in such litigation could cause us to
lose  exclusivity  relating  to  the  subject  matter  delineated by such patent
claims  and may have a material adverse effect on our business. If a third party
is  found  to have rights covering products or processes used by us, we could be
forced  to cease using the products or processes covered by the disputed rights,
subject  to  significant  liabilities  to  such  third  party and/or required to
license  technologies  from  such  third  party.  Also, different countries have
different  procedures  for  obtaining  patents  and  patents issued by different
countries  provide different degrees of protection against the use of a patented
invention  by others. There can be no assurance, therefore, that the issuance to
us  in  one  country  of  a patent covering an invention will be followed by the
issuance  in  other countries of patents covering the same invention or that any
judicial  interpretation  of the validity, enforceability or scope of the claims
in   a   patent   issued  in  one  country  will  be  similar  to  the  judicial
interpretation  given  to  a  corresponding  patent  issued  in another country.
Furthermore,  even  if  our owned or licensed patents are determined to be valid
and  enforceable, there can be no assurance that competitors will not be able to
design  around  such patents and compete with us using the resulting alternative
technology.  We  do  not  currently  have,  nor  do  we  intend  to seek, patent
protection relating to the use of THALOMID to treat ENL.

We  also  rely  upon unpatented, proprietary and trade secret technology that we
seek  to  protect, in part, by confidentiality agreements with our collaborative
partners,  employees,  consultants,  outside scientific collaborators, sponsored
researchers  and other advisors. There can be no assurance that these agreements
provide  meaningful  protection or that they will not be breached, that we would
have  adequate  remedies  for  any  such  breach  or  that  our  trade  secrets,
proprietary  know-how and technological advances will not otherwise become known
to  others.  In  addition,  there  can be no assurance that, despite precautions
taken  by  us,  others  have  not  and will not obtain access to our proprietary
technology  or  that  such technology will not be found to be non-proprietary or
not a trade secret.


GOVERNMENTAL REGULATION

Regulation  by governmental authorities in the United States and other countries
is  a significant factor in the manufacture and marketing of pharmaceuticals and
in  our  ongoing  research  and  development  activities. All of our therapeutic
products


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<PAGE>

will   require   regulatory   approval   by   governmental   agencies  prior  to
commercialization.  In  particular,  human  therapeutic  products are subject to
rigorous  preclinical  testing  and  clinical  trials  and  other  pre-marketing
approval  requirements by the FDA and regulatory authorities in other countries.
In  the  United  States,  various  federal, and in some cases state statutes and
regulations  also  govern  or  impact  upon the manufacturing, safety, labeling,
storage,  record-keeping  and marketing of such products. The lengthy process of
seeking   required  approvals  and  the  continuing  need  for  compliance  with
applicable  statutes  and  regulations,  require  the expenditure of substantial
resources.  Regulatory  approval,  when and if obtained, may be limited in scope
which  may  significantly  limit  the  indicated uses for which a product may be
marketed.  Further,  approved drugs, as well as their manufacturers, are subject
to  ongoing  review  and  discovery  of  previously  unknown  problems with such
products  may  result  in  restrictions  on their manufacture, sale or use or in
their  withdrawal  from  the  market.  Any  failure  by us, our collaborators or
licensees  to obtain or maintain, or any delay in obtaining regulatory approvals
could  adversely  affect  the  marketing  of  our  products,  and our ability to
receive product revenue, royalty revenue or profit sharing payments.

The  activities  required  before a pharmaceutical may be marketed in the United
States  begin with preclinical testing not involving human subjects. Preclinical
tests  include  laboratory evaluation of product chemistry and animal studies to
assess  the potential safety and efficacy of a product and its formulations. The
results  of  these  studies  must  be  submitted  to  the  FDA  as  part  of  an
Investigational  New Drug application, or IND, which must be reviewed by the FDA
primarily  for  safety  considerations before proposed clinical trials in humans
can begin.

Typically,  clinical  trials involve a three-phase process. In Phase I, clinical
trials  are  generally conducted with a small number of individuals to determine
the  early  safety and tolerability profile and the pattern of drug distribution
and  metabolism  within  the body. If the Phase I trials are satisfactory, Phase
II  clinical  trials are conducted with groups of patients in order to determine
preliminary  efficacy,  dosing regimes and expanded evidence of safety. In Phase
III,   large-scale,   multi-center,   adequately  powered  and  well-controlled,
comparative  clinical  trials  are  conducted with patients in effort to provide
enough  data  for  the  statistical proof of efficacy and safety required by the
FDA  and  others. However, in some limited circumstances Phase III trials may be
modified  to  allow  evaluation  of  safety  and  efficacy  in a less regimented
manner,  which  may  allow us to rely on historical data relating to the natural
course  of  disease  in untreated patients. In some cases, as a condition of NDA
approval,  confirmatory  trials  are  required  to  be conducted after the FDA's
approval  of  an  NDA  in  order  to  resolve  any open issues. The FDA requires
monitoring  of  all aspects of clinical trials and reports of all adverse events
must be made to the agency, both before and after drug approval.

The  results of the preclinical testing and clinical trials are submitted to the
FDA  as  part  of  an NDA for evaluation to determine if the product is adequate
for  approval to commence commercial sales. In responding to an NDA, the FDA may
grant   marketing   approval,   request   additional  information  or  deny  the
application  if  it  determines  that  the  application  does  not  satisfy  its
regulatory  approval  criteria.  When  an NDA is approved, the manufacturer must
employ  a  system  for obtaining reports of experience and side effects that are
associated with the drug and make appropriate submissions to the FDA.

Pursuant  to the Orphan Drug Act, a sponsor may request that the FDA designate a
drug  intended  to  treat  a  "rare disease or condition" as an "orphan drug." A
"rare  disease  or  condition" is defined as one which affects less than 200,000
people  in  the United States or which affects more than 200,000 people, but for
which  the  cost of development and making available the drug is not expected to
be  recovered  from sales of the drug in the United States. Upon the approval of
the  first  NDA  for  a  drug  designated  as  an  orphan  drug  for a specified
indication,  the sponsor of the NDA is entitled to exclusive marketing rights in
the  United  States  for  such  drug for that indication for seven years. Orphan
drugs  may  also be eligible for federal income tax credits for costs associated
with  the  drug's  development. Possible amendment of the Orphan Drug Act by the
United  States Congress and possible reinterpretation by the FDA are the subject
of   frequent   discussion.  FDA  regulations  reflecting  certain  definitions,
limitations  and  procedures initially went into effect in January 1993 and were
amended  in certain respects in 1998. Therefore, there is no assurance as to the
precise  scope  of  protection that may be afforded by orphan drug status in the
future  or  that the current level of exclusivity and tax credits will remain in
effect.  We  have received from the FDA orphan drug approval for thalidomide for
the  treatment  of  ENL.  Celgene also has received orphan drug designations for
thalidomide:  for  the  treatment  of  multiple  myeloma;  for  the treatment of
HIV-associated   wasting   syndrome;   for   the   treatment   of  the  clinical
manifestations  of  mycobacterial infection caused by Mycobacterium tuberculosis
and  non-tuberculosis  mycobacteria;  for  the  treatment  of  severe  recurrent
apthous  stomatitis  in  severely,  terminally compromised patients; and for the
treatment  of  Crohn's  disease.  We  also  obtained  orphan drug designation in
Kaposi's  sarcoma  and  primary brain malignancies as part of our agreement with
EntreMed.  However,  there can be no assurance that another company also holding
orphan  drug  designation  will  not receive approval prior to us for the use of
thalidomide  for  the  treatment of one or more of these indications, other than
ENL.  If  that were to happen, our applications for that indication could not be
approved   until  the  competing  company's  seven-year  period  of  exclusivity
expired.


                                       31
<PAGE>

Among  the  conditions  for NDA approval is the requirement that the prospective
manufacturer's  quality control and manufacturing procedures continually conform
with  the  FDA's  cGMP.  In  complying  with  cGMP,  manufacturers  must  devote
extensive  time,  money and effort in the area of production and quality control
and  quality  assurance  to  maintain  full  technical compliance. Manufacturing
facilities  and  company  records are subject to periodic inspections by the FDA
to  ensure  compliance.  If  a  manufacturing  facility  is  not  in substantial
compliance  with  these requirements, regulatory enforcement action may be taken
by  the FDA which may include seeking an injunction against shipment of products
from the facility and recall of products previously shipped from the facility.

Failure  to  comply  with  applicable  FDA regulatory requirements can result in
informal  administrative enforcement actions such as warning letters, recalls or
adverse  publicity  issued  by  the  FDA  or  in legal actions such as seizures,
injunctions,  fines  based  on the equitable remedy of disgorgement, restitution
and criminal prosecution.

Steps  similar  to  those  in  the United States must be undertaken in virtually
every  other  country  comprising  the  market  for our products before any such
product  can  be  commercialized  in those countries. The approval procedure and
the  time  required  for  approval  vary from country to country and may involve
additional  testing. There can be no assurance that approvals will be granted on
a  timely  basis  or  at  all.  In  addition,  regulatory  approval of prices is
required  in  most  countries  other  than  the  United  States. There can be no
assurance  that  the  resulting  prices  would  be  sufficient  to  generate  an
acceptable return to us.


COMPETITION

The  pharmaceutical  and  agrochemical  industries  in which we compete are each
highly   competitive.   Our   competitors   include   major  pharmaceutical  and
biotechnology  companies,  most  of  which  have considerably greater financial,
technical  and  marketing  resources  than us. We also experience competition in
the  development  of  our  products  and  processes  from universities and other
research  institutions  and, in some instances, compete with others in acquiring
technology from such sources.

Competition in the pharmaceutical industry, and specifically in the oncology and
immunology  areas  being  addressed  by us, is  particularly  intense.  Numerous
companies are pursuing  techniques  to modulate  TNF(alpha)  production  through
various  combinations of monoclonal  antibodies,  TNF(alpha) receptors and small
molecule  approaches.  Two  U.S.  companies,   Centocor  Inc.,  a  wholly  owned
subsidiary of Johnson & Johnson, and Immunex Corporation,  have registered drugs
that block the disease-causing  effects of TNF(alpha) in inflammatory  arthritis
and bowel disease.  Both drug products are registered  only in the United States
and have been  marketed  since 1998.  In the United  States the present  cost of
TNF(alpha)  modulating drugs, not including medical or other charges, is between
$7,000 and  $11,500 per  patient  year.  Both U.S.  companies  have  applied for
European registration of their products. Amgen Inc. is currently also developing
a soluble TNF(alpha) receptor. BASF A.G. has a human antibody in development and
Celltech  Group plc has a humanized  antibody.  In  addition,  a number of other
companies are attempting to address,  with other technologies and products,  the
disease  states  currently  being targeted by us.  EntreMed is  researching  the
effectiveness of its own thalidomide analogues as anti-angiogenic  agents in the
treatment  of retinal  disease and cancer.  Andrulis  Pharmaceuticals  Corp.,  a
small,  privately  held company,  is attempting to develop  thalidomide  for the
treatment of AIDS-related complications.

Several  companies  have  established  chiral  products and chiral technologies.
Sepracor  Inc.  and Chiroscience Group plc are actively developing chirally pure
versions  of  pharmaceuticals  currently  marketed in racemic form. Chiroscience
has  completed  Phase I trials in the United Kingdom for a chirally pure version
of  dl-methylphenidate  and  is  working  with Medeva plc, a leading supplier of
dl-methylphenidate  in  the  United  States,  towards full clinical development.
Chiroscience  has  also  taken  certain  steps  to assert patent and proprietary
rights   with  respect  to  its  formulation  of  a  chirally  pure  version  of
dl-methylphenidate.  The  agrochemical  market is large and, within this market,
efforts  are  underway  by  the  in-house  development  staffs  of  agrochemical
companies  to  produce  chirally  pure  versions  of their existing racemic crop
protection agents.

The  pharmaceutical and agrochemical industries have undergone, and are expected
to  continue  to  undergo,  rapid  and  significant  technological  change,  and
competition  is  expected  to  intensify as technical advances in each field are
made  and  become more widely known. In order to compete effectively, we will be
required  to  continually  upgrade  our  scientific  expertise  and  technology,
identify  and  retain capable management, and pursue scientifically feasible and
commercially viable opportunities.

Our  competition  will  be  determined  in part by the indications for which our
products  are  developed  and  ultimately approved by regulatory authorities. An
important  factor  in  competition  will be the timing of market introduction of
our  or our competitors' products. Accordingly, the relative speed with which we
can  develop  products,  complete  clinical  trials  and  approval processes and
supply  commercial  quantities  of products to the market will be expected to be
important  competitive  factors.  Competition  among  products approved for sale
will  be  based,  among  other things, on product efficacy, safety, convenience,
reliability, availability, price and patent position.


                                       32
<PAGE>

EMPLOYEES

As  of January 15, 2000, we had 146 full-time employees, 45 of whom were engaged
primarily  in  research  and  development activities, 60 of whom were engaged in
sales  and  commercialization  activities and the remainder of whom were engaged
in  executive  and  administrative  activities.  Of  these  employees,  53  have
advanced  degrees,  including  26  who  have  Ph.D.  degrees.  We  also maintain
consulting  arrangements with a number of scientists at various universities and
other research institutions in Europe and the United States.


PROPERTIES

We  lease  a  44,500-square  foot  laboratory and office facility in Warren, New
Jersey,  under  a  lease  with an unaffiliated party, which has a term ending in
May  2002  with  one five-year renewal option, and a 29,000-square foot facility
which  has  a  term  ending  in July 2010 with two five-year renewal options. We
also  lease  an  18,000-square  foot  laboratory  and  office  facility in North
Brunswick,  New  Jersey,  under  a  lease with an unaffiliated party which has a
term  ending  in  December  2009  with two five-year renewal options. We believe
that  our  laboratory  facilities  are adequate for our research and development
activities for at least the next 12 months.


LEGAL PROCEEDINGS

We are not engaged in any material legal proceedings.

                                       33
<PAGE>

                                  MANAGEMENT

DIRECTORS, OFFICERS AND KEY EMPLOYEES




<TABLE>
<CAPTION>
       --------------------------------------------------------------------------------
NAME                                       AGE    POSITION
       --------------------------------------------------------------------------------
<S>                                       <C>     <C>
John W. Jackson* ......................    55     Chairman of the Board and Chief Executive
                                                  Officer
Sol J. Barer, Ph.D*. ..................    52     President, Chief Operating Officer, Director
Robert J. Hugin* ......................    45     Chief Financial Officer and Senior Vice
                                                  President
David I. Stirling, Ph.D. ..............    46     Chief Scientific Officer and Executive Vice
                                                  President - Pharmaceutical Research and
                                                  Development
Jerome B. Zeldis, M.D., Ph.D. .........    49     Chief Medical Officer and Vice President --
                                                  Medical Affairs
Joseph J. Day, Jr. ....................    58     Senior Vice President -- Planning and
                                                  Business Development
George W. J. Matcham, Ph.D. ...........    47     Senior Vice President -- Celgro
Steven D. Thomas, Ph.D. ...............    38     Vice President -- Regulatory Affairs and
                                                  Project Management
Bruce A. Williams .....................    45     Vice President -- Marketing and Sales
Jack L. Bowman ........................    67     Director
Frank T. Cary .........................    79     Director
Arthur Hull Hayes, Jr., M.D. ..........    66     Director
Gilla Kaplan, Ph.D. ...................    52     Director
Richard C.E. Morgan ...................    55     Director
Walter L. Robb, Ph.D. .................    71     Director
Lee J. Schroeder ......................    71     Director
</TABLE>

* Executive Officer

JOHN  W.  JACKSON has been our Chairman of the Board and Chief Executive Officer
since  January  1996.  From  February  1991  to  January  1996,  Mr. Jackson was
President  of  Gemini  Medical,  a  consulting  firm  that  he founded and which
specialized  in  services  and  investment advice to start-up medical device and
biotechnology  companies.  Previously,  Mr.  Jackson  had  been President of the
worldwide  Medical  Device Division of American Cyanamid, a major pharmaceutical
company,  from February 1986 to January 1991 and served in various international
positions, including Vice President --
International  for  American  Cyanamid  from 1978 to 1986. Mr. Jackson served in
several   human   health  marketing  positions  at  Merck  &  Company,  a  major
pharmaceutical  company,  from  1971 to 1978. Mr. Jackson received a B.A. degree
from Yale University and an M.B.A. from INSEAD, France.

SOL  J.  BARER,  PH.D.  has  been our President since October 1993 and our Chief
Operating  Officer  and one of our directors since March 1994. Dr. Barer was our
Senior  Vice  President  --  Science  and  Technology and Vice President/General
Manager  --  Chiral  Products  from  October  1990  to October 1993 and our Vice
President  -- Technology from September 1987 to October 1990. Dr. Barer received
a Ph.D. in organic and physical chemistry from Rutgers University.

ROBERT  J.  HUGIN has been our Senior Vice President and Chief Financial Officer
since  June  1999.  Previously,  Mr.  Hugin had been a Managing Director at J.P.
Morgan  &  Co.  Inc., which he joined in 1985. Mr. Hugin received an A.B. degree
from Princeton University and an M.B.A. from the University of Virginia.

DAVID   I.   STIRLING,   PH.D.   has   been  our  Executive  Vice  President  --
Pharmaceutical  Research  and  Development  since  1996 and our Chief Scientific
Officer  since  1998.  Dr.  Stirling served as Senior Vice President--Biological
and  Pharmaceutical  Research  and  Development  from  1993  to  1996,  as  Vice
President  -- New Technology Chiral Products from 1991 to 1993, and in a variety
of  other  research  positions  from  1986 to 1991. Previously, Dr. Stirling was
employed  by  Celanese  Research Company, a major chemical company, from 1980 to
1986.  Dr.  Stirling  received  a  Ph.D.  in biochemistry from the University of
Warwick.


                                       34
<PAGE>

JEROME  B. ZELDIS, M.D., PH.D. has been our Chief Medical Officer since 1999 and
our  Vice  President  --  Medical  Affairs  since February 1997. Since 1996, Dr.
Zeldis  has  also been Associate Attending Physician at New York Hospital. Since
1995,  Dr.  Zeldis  has  also  been  a Clinical Associate Professor of Medicine,
Cornell  University  Medical  School. From 1990 to 1994, Dr. Zeldis was Clinical
Research  Physician,  Sacramento  Medical Foundation, Center for Blood Research,
and  Associate  Professor  of Medicine at the University of California at Davis.
From  1988  to  1990,  Dr.  Zeldis  was  Assistant  Professor of Medicine at the
University  of  California at Davis. From 1986 to 1988, Dr. Zeldis was Assistant
Professor  of  Medicine,  Harvard  Medical  School. Dr. Zeldis was a director of
Sandoz  Research Foundation and Janssen Research Foundation. Dr. Zeldis received
a  Ph.D.  in  molecular  biophysics  and  biochemistry from Yale University. Dr.
Zeldis also received an M.D. degree from Yale Medical School.

JOSEPH  J.  DAY,  JR.  has been our Senior Vice President, Planning and Business
Development   since   January  1998.  Mr.  Day  is  a  28-year  veteran  of  the
pharmaceutical   industry.   During   his  career,  Mr.  Day  has  held  various
international  and  domestic  management positions with Cephalon, Inc., American
Home   Products   Corporation,   Johnson   &  Johnson,  Merck  and  Company  and
Schering-Plough  Corporation.  Mr.  Day received a B.S. in pharmacy from Fordham
University and an M.B.A. from Rutgers University.

GEORGE  W.  J. MATCHAM, PH.D. has been our Senior Vice President -- Celgro since
1996.  Dr.  Matcham  joined  in  1988, and became Vice President of Chiral Amine
Technology  in 1991 and Vice President and General Manager of Chiral Products in
1993.  Previously,  Dr.  Matcham  was  a Senior Scientist and Project Leader for
Shell  Research  Ltd.,  UK,  the  physical and biological research subsidiary of
Royal  Dutch/Shell, from 1981 to 1988. Dr. Matcham received a Ph.D. in microbial
enzymology  from  the  University  of  Wales,  and  was  Director  of Studies in
chemistry,  and a fellow of Emmanuel College of the University of Cambridge from
1979 to 1980.

STEVEN  D.  THOMAS,  PH.D. has been our Vice President -- Regulatory Affairs and
Project   Management   since   August   1999  and  was  our  Vice  President  --
Pharmaceutical  Development  from 1996 to 1999. Dr. Thomas held various research
and  development positions with us from 1992 to 1996. Previously, Dr. Thomas was
a  Business Unit Manager for Enzymatix Ltd., a pharmaceutical and fine chemicals
company,  from 1987 to 1992. Dr. Thomas received a Ph.D. in molecular enzymology
from Southampton University.

BRUCE  A.  WILLIAMS  has  been  our  Vice President -- Marketing and Sales since
1996.  Previously, Mr. Williams was employed by Ortho Biotech Inc., a subsidiary
of  Johnson  &  Johnson,  where  he  held  various  positions from 1989 to 1996,
including  Executive Director -- Marketing. From 1984 to 1989, Mr. Williams held
several  positions at American Cyanamid Company. Mr. Williams received a B.A. in
biology from Syracuse University and an M.B.A. from Columbia University.

JACK  L.  BOWMAN, one of our directors since April 1998, served as Company Group
Chairman  of  Johnson & Johnson from 1987 to 1994. From 1983 to 1987, Mr. Bowman
served  as  Executive  Vice President of American Cyanamid. Mr. Bowman is also a
director  of  NeoRx  Corporation,  Cell  Therapeutics,  Inc., CytRx Corporation,
Cellegy Pharmaceuticals and Targeted Genetics.

FRANK  T.  CARY  has  been  Chairman  of the Executive Committee of our board of
directors  since  July  1990  and has been one of our directors since 1987. From
1973  to 1981, Mr. Cary was Chairman of the Board and Chief Executive Officer of
International  Business  Machines  Corporation.  Mr.  Cary also is a director of
Cygnus  Therapeutic  Systems  Inc.,  ICOS  Corporation,  Lincare  Inc.,  Lexmark
International Inc., Vion Pharmaceuticals Inc. and Teltrend, Inc.

ARTHUR  HULL  HAYES,  JR.,  M.D.,  one  of  our  directors  since 1995, has been
President  and  Chief  Operating Officer of MediScience Associates, a consulting
organization  that  works  with  pharmaceutical  firms, biomedical companies and
foreign  governments,  since  July  1991.  Dr.  Hayes has also been a partner in
Issue  Sphere,  a  public  affairs  firm  that focuses on health science issues,
since  November  1995,  as  well  as  a  professor in medicine, pharmacology and
family  and  community  medicine  at  New  York  Medical  College  and  clinical
professor  of  medicine  and  pharmacology  at the Pennsylvania State University
College  of  Medicine.  From  1986  to  1990,  Dr. Hayes was President and Chief
Executive  Officer  of E.M. Pharmaceuticals, a unit of E. Merck AG and from 1981
to  1983 was Commissioner of the United States Food and Drug Administration. Dr.
Hayes  also  is a director of Myriad Genetics, Inc., NaPro BioTherapeutics, Inc.
and Premier Research Worldwide.

GILLA  KAPLAN,  PH.D., one of our directors since April 1998, is an immunologist
in  the  Laboratory  of  Cellular  Physiology  and Immunology at The Rockefeller
University  in  New York where she was appointed Assistant Professor in 1985 and
Associate  Professor  in  1990.  Dr. Kaplan is a member of numerous professional
societies  and has been the organizer of several major symposia on tuberculosis.
Dr. Kaplan has served as an advisor to the Global Program for Vaccines and


                                       35
<PAGE>

Immunization  of  the World Health Organization, has participated in several NIH
peer   review   panels,  and  is  on  the  Editorial  Board  of  Microbial  Drug
Resistances,  and  Tubercle  and  Lung Disease. Dr. Kaplan is the author of more
than  100 scientific publications and has received international recognition for
her  work.  In  1995,  she  gave  the  Special  Honorary Lecture at the American
Society  for  Microbiology  and  in  1997 was appointed a Fellow of the American
Academy of Microbiology.


RICHARD  C.E.  MORGAN,  one  of  our directors since 1987, has been the Managing
Member  of Amphion Partners LLC, formerly Wolfensohn Partners, L.P., since 1986.
From  January  1996  to  January  1998, Mr. Morgan was a partner of Jackson Hole
Management  Company,  Inc. Mr. Morgan also is Chairman of the board of directors
of  AXCESS,  Inc.,  Chairman  of  the  board of directors of Quidel Corp., and a
director of Indigo, N.V. and Orbis International, Inc.


WALTER  L.  ROBB,  PH.D.,  one  of  our directors since 1992, has been a private
consultant  and  President of Vantage Management Inc., a consulting and investor
services  company,  since  January  1993. Mr. Robb was Senior Vice President for
Corporate  Research and Development of General Electric Company, and a member of
its  Corporate  Executive  Council  from 1986 to December 1992. Mr. Robb also is
Chairman  of the board of directors of Capital District Sports and a director of
Cree Research Inc., Mechanical Technology, Inc. and Plug Power, Inc.


LEE  J.  SCHROEDER,  one  of our directors since 1995, has been President of Lee
Schroeder  &  Associates, Inc., pharmaceutical business consultants, since 1985.
Mr.  Schroeder  was President of Fox Meyer Lincoln from 1983 to 1985, and was an
Executive  Vice  President of Sandoz, Inc. from 1981 to 1983. Mr. Schroeder also
is   a  director  of  Bryan  LGH  Hospital,  MGI  Pharmaceutical,  Inc.,  Ascent
Pediatrics, Inc. and Interneuron Pharmaceuticals, Inc.


                                       36
<PAGE>

                             SELLING STOCKHOLDERS

The  table  below  sets forth the beneficial ownership of our common stock as of
December  31,  1999 by each of the selling stockholders. Beneficial ownership of
our  common  stock  is determined in accordance with the rules of the Securities
and  Exchange  Commission and generally includes voting or investment power with
respect  to securities and options that are exercisable or convertible within 60
days.  Each  of  the  selling  stockholders has sole voting and investment power
with  respect  to  all shares of common stock shown as beneficially owned by it.
All  of  the  shares owned by each selling stockholder are shares underlying our
convertible notes held by it.



<TABLE>
<CAPTION>
                                                               --------------------------------------------
                                                           SHARES OWNED       NUMBER OF SHARES      SHARES OWNED
                                                        PRIOR TO OFFERING       BEING OFFERED      AFTER OFFERING
                                                       --------------------  ------------------  -------------------
NAME AND ADDRESS OF BENEFICIAL OWNER                     NUMBER    PERCENT                         NUMBER    PERCENT
- -----------------------------------------------------  ---------  ---------                      ---------  --------
<S>                                                    <C>        <C>        <C>                 <C>        <C>
 Hancock Mezzanine Partners, LP .....................   416,700       2.3%         258,000        158,700      *
  c/o John Hancock Life Insurance Company
  200 Clarendon Street
  Boston, MA 02117
  Attention: Sandeep Alva
        Bond & Corporate Finance Group, T-57

 Signature 1A (Cayman), Ltd. ........................    27,780         *           17,200         10,580      *
  c/o John Hancock Life Insurance Company
  200 Clarendon Street
  Boston, MA 02117
  Attention: Manager
        Investment Accounting Division, B-3

 John Hancock Variable Life Insurance Company .......    11,112         *            6,880          4,232      *
  c/o John Hancock Life Insurance Company
  200 Clarendon Street
  Boston, MA 02117
  Attention: Manager
        Investment Accounting Division, B-3

 John Hancock Life Insurance Company ................   377,808       2.0%         233,920        143,888      *
  200 Clarendon Street
  Boston, MA 02117
  Attention: Manager
        Investment Accounting Division, B-3
</TABLE>

- ---------
* Represents less than 1%.

                                       37
<PAGE>

                         DESCRIPTION OF CAPITAL STOCK

As  of  December  31,  1999, our authorized capital stock consists of 30,000,000
shares  of  common  stock,  par  value  $.01  per share, and 5,000,000 shares of
preferred  stock,  par  value  $.01  per  share,  of  which 520 shares have been
designated  Series  A  convertible  preferred  stock and 20,000 shares have been
designated  as  Series  B  convertible preferred stock. As of December 31, 1999,
there  were 17,703,646 shares of common stock outstanding, no shares of Series A
convertible  preferred  stock  outstanding and no shares of Series B convertible
preferred stock outstanding.



COMMON STOCK

Holders  of  common  stock  are  entitled to one vote for each share held on all
matters  submitted  to a vote of stockholders, and do not have cumulative voting
rights.  Holders of common stock are entitled to receive ratably such dividends,
if  any,  as  may  be  declared  by  our board of directors out of funds legally
available  therefor, and subject to any preferential dividend rights of any then
outstanding  preferred  stock.  Upon  liquidation, dissolution, or winding up of
us,  the  holders of common stock are entitled to receive ratably our net assets
available  after  the  payment of all debts and other liabilities and subject to
any  liquidation  preference of any then outstanding preferred stock. Holders of
common  stock  have  no preemptive, subscription or conversion rights. There are
no  redemption  or  sinking  fund provisions applicable to the common stock. The
outstanding  shares  of  common  stock are, and the shares offered by us in this
offering will be when issued and paid for, fully paid and non-assessable.



PREFERRED STOCK

Our  board  of  directors  has  the  authority, subject to certain restrictions,
without  further  stockholder  approval,  to issue, at any time and from time to
time,  shares  of  preferred stock in one or more series. Each such series shall
have   such   number   of  shares,  designations,  preferences,  voting  powers,
qualifications,  and  special  or  relative  rights  or  privileges  as shall be
determined  by our board of directors, which may include, among others, dividend
rights,  voting  rights,  redemption  and  sinking  fund provisions, liquidation
preferences,  conversion rights and preemptive rights, to the full extent now or
hereafter permitted by the laws of the State of Delaware.

The  rights  of  the  holders  of  common  stock  will be subject to, and may be
adversely  affected by, the rights of holders of any preferred stock that may be
issued  in  the  future.  Such  rights  may include voting and conversion rights
which  could  adversely  affect the holders of the common stock. Satisfaction of
any  dividend preferences of outstanding preferred stock would reduce the amount
of  funds  available,  if  any,  for  the  payment of dividends on common stock.
Holders  of  preferred stock would typically be entitled to receive a preference
payment.



SHAREHOLDER RIGHTS PLAN

Our  board  of  directors has adopted a shareholder rights plan. The shareholder
rights  plan  was  adopted to give the Board increased power to negotiate in our
best  interests and to discourage appropriation of control of us at a price that
is  unfair  to  our  stockholders. It is not intended to prevent fair offers for
acquisition  of  control  determined by our board of directors to be in the best
interests  of us and our stockholders, nor is it intended to prevent a person or
group  from  obtaining  representation  on  or control of our board of directors
through  a  proxy contest, or to relieve our board of directors of its fiduciary
duty to consider any proposal for our acquisition in good faith.

The  shareholder  rights  plan  involved  the  distribution  of one "right" as a
dividend  on each outstanding share of our common stock to all holders of record
on  September  26,  1996.  Each  right  shall  entitle  the  holder  to purchase
one-tenth  of  a  share  of  common  stock.  The rights trade in tandem with the
common  stock  until,  and  become  exercisable  upon, the occurrence of certain
triggering  events,  and  the exercise price is based on the estimated long-term
value  of  our  common  stock. The exercise of these rights becomes economically
attractive  upon the triggering of certain "flip-in" or "flip-over" rights which
work  in  conjunction  with  the shareholder rights plan's basic provisions. The
flip-in  rights  will permit their holders to purchase shares of common stock at
a  discounted  rate,  resulting  in substantial dilution of an acquiror's voting
and  economic  interests  in us. The flip-over element of the shareholder rights
plan  involves  some  mergers  or  significant  asset  purchases,  which trigger
certain  rights  to  purchase  shares of the acquiring or surviving company at a
discount.  The  shareholder  rights  plan contains a "permitted offer" exception
which  allows  offers  determined  by  our  board of directors to be in our best
interests  and  our  stockholders  to take place free of the diluting effects of
the shareholder rights plan's mechanisms.


                                       38
<PAGE>

Our  board  of directors retains the right, at all times prior to acquisition of
15%  of  our  voting common stock by an acquiror, to discontinue the shareholder
rights  plan  through  the redemption of all rights, or to amend the shareholder
rights plan in any respect.


DELAWARE LAW AND SOME BY-LAW PROVISIONS

Our  board  of  directors has adopted certain amendments to our by-laws 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 persons who are  nominated in  accordance  with the
     procedures  set forth in the by-laws  shall be eligible for election as our
     directors, except as may be otherwise provided in the by-laws;

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;


o    they  provide  that  only the  Chairman  of the  Board,  if any,  the Chief
     Executive Officer, the President,  the Secretary or a majority of our board
     of directors may call special meetings of our stockholders;

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

o    they require a vote of holders of two-thirds of the  outstanding  shares of
     common stock to amend certain by-law provisions.

Furthermore,  we  are  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.


TRANSFER AGENT AND REGISTRAR

The  transfer  agent  and  registrar  for  the  common  stock  is American Stock
Transfer  &  Trust  Company. It is located at 40 Wall St., 46th Floor, New York,
NY, 10005, and its telephone number is (718) 921-8200.


                                       39
<PAGE>

                        SHARES ELIGIBLE FOR FUTURE SALE

Future  sales  of substantial amounts of our common stock could adversely affect
the  prevailing  market  price  of our common stock. In addition, as of December
31,  1999, there were outstanding stock options exercisable for 2,327,267 shares
of  common  stock,  of which 967,234 were currently exercisable, and outstanding
warrants  exercisable  for  551,044  shares  of  common  stock.  If  all  of the
convertible  notes  outstanding  on December 31, 1999 had been converted on that
date,  2,418,313  shares  of  common  stock  would have been issued. Immediately
prior  to  this offering, the selling stockholders will convert a portion of our
9.0%  convertible  notes issued in January 1999 held by them into 516,000 shares
of  our  common  stock. All shares of common stock referred to in this paragraph
would be freely tradeable upon issuance. See "Description of Capital Stock."

Shares  which  may  be  acquired by a person deemed an affiliate of ours as that
term  is  defined  in Rule 144 promulgated under the Securities Act of 1933 will
remain  subject  to  the  resale  limitations  of  Rule 144. Generally, Rule 144
provides  that  a  person  who has beneficially owned "restricted" shares for at
least  one  year  will  be  entitled  to  sell  on  the  open market in brokers'
transactions  within  any  three  month  period a number of shares that does not
exceed the greater of:

o    1% of the then outstanding shares of common stock; and

o    the average  weekly  trading  volume in the common stock on the open market
     during the four calendar weeks preceding such sale.

Sales  under  Rule 144 are also subject to certain post-sale notice requirements
and the availability of current public information about us.

In  the event that any person who is deemed to be our affiliate purchases shares
of  our  common stock pursuant to this offering or acquires shares of our common
stock  pursuant  to  one  of our employee benefit plans, the shares held by such
person  are required under Rule 144 to be sold in brokers' transactions, subject
to  the  volume  limitations  described  above. Shares properly sold in reliance
upon  Rule  144  to  persons  who  are  not our affiliates are thereafter freely
tradable without restriction.

We  and  our  executive officers and directors and the selling stockholders have
agreed,  with  limited  exceptions,  that,  during the period beginning from the
date  of  this prospectus and continuing to and including the date 90 days after
the  date  of  this  prospectus, none of us will, directly or indirectly, offer,
sell,  offer  to  sell,  contract  to sell or otherwise dispose of any shares of
common  stock  or  any  of our securities which are substantially similar to the
common  stock,  including but not limited to any securities that are convertible
into  or  exchangeable for, or that represent the right to receive, common stock
or  any  such  substantially  similar securities or enter into any swap, option,
future,  forward  or  other  agreement  that transfers, in whole or in part, the
economic   consequence   of   ownership   of  common  stock  or  any  securities
substantially  similar  to the common stock, other than pursuant to the exercise
of  stock  options  and warrants outstanding on the date of this prospectus, the
conversion  of  our convertible notes outstanding on the date of this prospectus
and  employee  and  director  stock  option  plans  existing on the date of this
prospectus, without the prior written consent of J.P. Morgan Securities Inc.


                                       40
<PAGE>

                                 UNDERWRITING

J.P.  Morgan  Securities  Inc. and Prudential Securities Incorporated are acting
as  joint  lead  managers. J.P. Morgan Securities Inc. is acting as book running
lead manager for this offering.

The  underwriters  named below, for whom J.P. Morgan Securities Inc., Prudential
Securities  Incorporated  and  U.S.  Bancorp  Piper  Jaffray  Inc. are acting as
representatives,  have severally agreed, subject to the terms and conditions set
forth  in  the  underwriting  agreement between us, the selling stockholders and
the  underwriters,  to purchase from us and the selling stockholders, and we and
the   selling  stockholders  have  agreed  to  sell  to  the  underwriters,  the
respective  numbers  of  shares  of  common stock set forth opposite their names
below:



<TABLE>
<CAPTION>
                                                             -------------
                                                              NUMBER OF SHARES
UNDERWRITERS                                                 -----------------
<S>                                                          <C>
J.P. Morgan Securities Inc. ................................     1,012,500
Prudential Securities Incorporated .........................     1,012,500
U.S. Bancorp Piper Jaffray Inc. ............................       675,000
Adams, Harkness & Hill, Inc. ...............................        30,000
Banc of America Securities LLC .............................        30,000
Bear, Stearns & Co. Inc. ...................................        30,000
Deutsche Bank Securities Inc. ..............................        30,000
FAC/Equities ...............................................        30,000
FleetBoston Robertson Stephens Inc. ........................        30,000
Lehman Brothers Inc. .......................................        30,000
Merrill Lynch, Pierce, Fenner & Smith Incorporated .........        30,000
Salomon Smith Barney Inc. ..................................        30,000
Vanguard Capital ...........................................        30,000
                                                                 ---------
    Total ..................................................     3,000,000
                                                                 =========

</TABLE>

The  nature of the underwriters' obligations under the underwriting agreement is
such  that  all  of  the common stock being offered, excluding shares covered by
the  over-allotment option granted to the underwriters, must be purchased if any
are purchased.

The  representatives  of  the  underwriters  have  advised  us  and  the selling
stockholders  that the several underwriters propose to offer the common stock to
the  public  initially  at the public offering price set forth on the cover page
of  this  prospectus  and may offer the common stock to selected dealers at such
price  less  a  concession  not  to exceed $3.64 per share. The underwriters may
allow,  and  such  dealers  may  reallow,  a  concession to other dealers not to
exceed  $0.10  per share. After the initial public offering of the common stock,
the  public  offering  price  and  other  selling  terms  may  be changed by the
representatives.

We  have  granted  the  underwriters an option, exercisable for 30 days from the
date  of  this prospectus, to purchase up to 450,000 additional shares of common
stock  at  the same price per share to be paid by the underwriters for the other
shares  offered  hereby. If the underwriters purchase any such additional shares
pursuant  to  the option, each of the underwriters will be committed to purchase
such  additional shares in approximately the same proportion as set forth in the
above   table.   The   underwriters  may  exercise  the  option  only  to  cover
over-allotments,  if any, made in connection with the distribution of the common
stock offered hereby.

The  following  tables show the per share and total underwriting discounts to be
paid  to  the  underwriters by us and the selling stockholders, assuming both no
exercise and full exercise of the underwriters' over-allotment option.



<TABLE>
<CAPTION>
                           ----------------------
                             PAYABLE BY CELGENE
                      --------------------------------
                          NO EXERCISE    FULL EXERCISE
                      ---------------   --------------
<S>                   <C>               <C>
Per share .........     $      6.06      $      6.06
  Total ...........     $15,053,040      $17,780,040

</TABLE>



                                       41
<PAGE>


<TABLE>
<CAPTION>
                          ----------------------
                              PAYABLE BY THE
                           SELLING STOCKHOLDERS
                      ------------------------------
                        NO EXERCISE    FULL EXERCISE
                      -------------   --------------
<S>                   <C>             <C>
Per share .........    $     6.06       $     6.06
  Total ...........    $3,126,960       $3,126,960

</TABLE>

We  and  the  selling  stockholders  have  agreed  to indemnify the underwriters
against  certain liabilities, including liabilities under the Securities Act, or
to  contribute  to  payments the underwriters may be required to make in respect
thereof.

We  estimate  that  the  total  expenses  of  this  offering  to  us,  excluding
underwriting  discounts,  will be $492,000. The selling stockholders will pay no
expenses of this offering.

In  connection  with  this offering, the underwriters may engage in transactions
that  stabilize,  maintain  or  otherwise  affect  the  price  of  common stock.
Specifically,   the   underwriters  may  overallot  this  offering,  creating  a
syndicate  short  position.  In  addition,  the  underwriters  may  bid for, and
purchase,  shares  of  common stock in the open market to cover syndicate shorts
or  to  stabilize  the  price  of  the  common  stock. Finally, the underwriting
syndicate  may  reclaim  selling  concessions allowed for distributing shares of
common   stock  in  this  offering,  if  the  syndicate  repurchases  previously
distributed  common  stock  in syndicate covering transactions, in stabilization
transactions  or  otherwise.  Any  of these activities may stabilize or maintain
the  market price of the shares of common stock above independent market levels.
The  underwriters  are  not  required to engage in these activities, and may end
any of these activities at any time.

Prior  to  the  pricing  of  the  common  stock,  and  until  such  time  when a
stabilizing  bid  may  have  been  made, some or all of the underwriters who are
market  makers  in  the common stock may make bids for or purchases of shares of
common  stock  subject  to  certain restrictions, known as passive market making
activities.

One  or  more  of the underwriters may facilitate the marketing of this offering
online  directly  or  through one of its affiliates. In those cases, prospective
investors  may  view  offering terms and a prospectus online and, depending upon
the  particular  underwriter,  place  orders  online  or through their financial
advisors.

We  and  our  executive officers and directors and the selling stockholders have
agreed,  with  limited  exceptions,  that,  during the period beginning from the
date  of  this prospectus and continuing to and including the date 90 days after
the  date  of  this  prospectus, none of us will, directly or indirectly, offer,
sell,  offer  to  sell,  contract  to sell or otherwise dispose of any shares of
common  stock  or  any  of our securities which are substantially similar to the
common  stock,  including but not limited to any securities that are convertible
into  or  exchangeable for, or that represent the right to receive, common stock
or  any  such  substantially  similar securities or enter into any swap, option,
future,  forward  or  other  agreement  that transfers, in whole or in part, the
economic   consequence   of   ownership   of  common  stock  or  any  securities
substantially  similar  to the common stock, other than pursuant to the exercise
of  stock  options  and warrants outstanding on the date of this prospectus, the
conversion  of  our convertible notes outstanding on the date of this prospectus
and  employee  and  director  stock  option  plans  existing on the date of this
prospectus, without the prior written consent of J.P. Morgan Securities Inc.

The  common  stock  is  traded  on  the  Nasdaq National Market under the symbol
"CELG."

It  is  expected  that  delivery  of  the shares will be made to investors on or
about February 16, 2000.

From  time  to  time  in  the  ordinary  course  of their respective businesses,
certain  of  the  underwriters  and  their  affiliates  have  engaged in and may
continue  to engage in commercial banking and/or investment banking transactions
with us and our affiliates.


                                       42
<PAGE>

                                 LEGAL MATTERS

Proskauer  Rose  LLP,  New  York,  New  York,  has passed on the validity of the
shares.  Certain legal matters in connection with this offering are being passed
upon for the underwriters by Cahill Gordon & Reindel, New York, New York.



                                    EXPERTS

Our  consolidated financial statements as of December 31, 1998 and 1997, and for
each  of  the  years in the three-year period ended December 31, 1998, have been
included  herein  and  in the Registration Statement in reliance upon the report
of  KPMG  LLP,  independent  certified  public  accountants, appearing elsewhere
herein,  and  upon  the  authority  of  said  firm  as experts in accounting and
auditing.

The  statements  in this prospectus under the captions "Risk Factors--We may not
be  able  to  protect  our  intellectual  property"  and  "Business--Patents and
Proprietary  Technology"  have  been  reviewed and approved by Mathews, Collins,
Shepherd  & Gould, P.A. and are included herein in reliance upon such review and
approval.

The  statements  in  this  prospectus that relate to U.S. patent rights licensed
from  The  Rockefeller  University  and EntreMed/Children's Medical Center Corp.
under   the   captions  "Risk  Factors--We  may  not  be  able  to  protect  our
intellectual  property"  and "Business--Patents and Proprietary Technology" have
been  reviewed and approved by Pennie & Edmonds LLP as special patent counsel to
Celgene  Corporation for these matters, and are included herein in reliance upon
their review and approval as experts in U.S. patent law.

The  statements  in  this  prospectus  under  the  captions  "Risk  Factors--The
pharmaceutical  and  agrochemical industries are subject to extensive government
regulation   and   there   is   no   assurance   of   regulatory  approval"  and
"Business--Governmental   Regulation"   have   been  reviewed  and  approved  by
Kleinfeld,  Kaplan & Becker, as experts in such matters, and are included herein
in reliance upon such review and approval.



                      WHERE YOU CAN FIND MORE INFORMATION

We  file  reports with the Securities and Exchange Commission on a regular basis
that  contain  financial information about us and our results of operations. You
may  read  or  copy  any  document that we file with the Securities and Exchange
Commission  at the Securities and Exchange Commission's Public Reference Room at
450  Fifth  Street, N.W., Washington, D.C. 20549 and 7 World Trade Center, Suite
1300,  New  York,  New  York  10048. You may obtain information about the Public
Reference  Room  by  calling  the  Securities  and  Exchange Commission for more
information  at  1-800-SEC-0330.  Our Securities and Exchange Commission filings
are  also  available  at  the  Securities  and Exchange Commission's web site at
http://www.sec.gov.

The  Securities  and Exchange Commission allows us to "incorporate by reference"
the  information  we  file with them, which means that we can disclose important
information  to  you  by  referring  you  to  those  documents.  The information
incorporated  by  reference  is  considered  to  be part of this prospectus, and
information  that we file later with the Securities and Exchange Commission will
automatically  update  and  supersede  this information. We are incorporating by
reference  the  documents  listed below and any future filings that we will make
with  the  Securities and Exchange Commission under Sections 13(a), 13(c), 14 or
15(d) of the Securities Exchange Act of 1934:

o    Our Annual Report on Form 10-K for the fiscal year ended December 31, 1998,
     as  amended  by an  Amendment  on  Form  10-K/A  and an  Amendment  on Form
     10-K/A-2;

o    Our  Quarterly  Report on Form 10-Q for the fiscal  quarter ended March 31,
     1999;

o    Our  Quarterly  Report on Form 10-Q for the fiscal  quarter  ended June 30,
     1999;

o    Our Quarterly  Report on Form 10-Q for the fiscal  quarter ended  September
     30, 1999;

o    Our Current Report on Form 8-K dated February 11, 1999;

o    Our Current Report on Form 8-K dated January 27, 2000;

o    Our Current Report on Form 8-K dated February 9, 2000; and

o    Our Current Report on Form 8-K dated February 9, 2000.

                                       43
<PAGE>

You  may  request a copy of these filings, at no cost, by writing or telephoning
   our Secretary at the following address:

        Celgene Corporation
        7 Powder Horn Drive
        Warren, NJ 07059
        (732) 271-1001

This  prospectus  is  part  of  a  registration  statement  we  filed  with  the
Securities  and  Exchange Commission. You should rely only on the information or
representations  provided  in  this  prospectus.  We  have  authorized no one to
provide  you  with  different  information.  We are not making an offer of these
securities  in any state where the offer is not permitted. You should not assume
that  the  information  in this prospectus is accurate as of any date other than
the date on the front of the document.


                                       44
<PAGE>

                              CELGENE CORPORATION

                  INDEX TO CONSOLIDATED FINANCIAL STATEMENTS




<TABLE>
<CAPTION>
                                                                                           PAGE
<S>                                                                                       <C>
AUDITED CONSOLIDATED FINANCIAL STATEMENTS

Independent Auditors' Report ............................................................ F-2

Consolidated Balance Sheets as of December 31, 1997 and 1998 ............................ F-3

Consolidated Statements of Operations -- Years Ended
 December 31, 1996, 1997, and 1998 ...................................................... F-4

Consolidated Statements of Stockholders' Equity (Deficit) -- Years Ended
 December 31, 1996, 1997 and 1998 ....................................................... F-5

Consolidated Statements of Cash Flows -- Years Ended December 31, 1996, 1997 and 1998 ... F-8

Notes to Consolidated Financial Statements .............................................. F-10



UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

Condensed Consolidated Balance Sheet as of September 30, 1999 ........................... F-20

Condensed Consolidated Statements of Operations -- Nine Months Ended
 September 30, 1999 and 1998 ............................................................ F-21

Condensed Consolidated Statements of Operations -- Three Months Ended
 September 30, 1999 and 1998 ............................................................ F-22

Consolidated Statements of Cash Flows -- Nine Months Ended
 September 30, 1999 and 1998 ............................................................ F-23

Notes to Unaudited Condensed Consolidated Financial Statements .......................... F-24
</TABLE>


                                      F-1
<PAGE>

                         INDEPENDENT AUDITORS' REPORT


The Board of Directors and Stockholders
CELGENE CORPORATION:

We  have  audited  the  accompanying  consolidated  balance  sheets  of  Celgene
Corporation  and  subsidiary  as  of December 31, 1997 and 1998, and the related
consolidated  statements of operations, stockholders' equity (deficit), and cash
flows  for  each  of the years in the three-year period ended December 31, 1998.
These  consolidated financial statements are the responsibility of the Company's
management.  Our  responsibility  is to express an opinion on these consolidated
financial statements based on our audits.

We   conducted  our  audits  in  accordance  with  generally  accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable  assurance  about  whether  the consolidated financial statements are
free  of  material  misstatement.  An audit includes examining, on a test basis,
evidence  supporting  the  amounts and disclosures in the consolidated financial
statements.  An audit also includes assessing the accounting principles used and
significant  estimates  made  by  management,  as well as evaluating the overall
consolidated  financial  statement  presentation.  We  believe  that  our audits
provide a reasonable basis for our opinion.

In  our opinion, the consolidated financial statements referred to above present
fairly,  in all material respects, the financial position of Celgene Corporation
and  subsidiary  as  of  December  31,  1997  and 1998, and the results of their
operations  and  their cash flows for each of the years in the three-year period
ended  December  31,  1998  in  conformity  with  generally  accepted accounting
principles.

                                    /s/ KPMG LLP

Short Hills, New Jersey
February 11, 1999

                                      F-2
<PAGE>

                              CELGENE CORPORATION
                          CONSOLIDATED BALANCE SHEETS




<TABLE>
<CAPTION>
                                                                                               ---------------------
                                                                                                   DECEMBER 31,
                                                                                       -------------------------------------
                                                                                                    1997                1998
                                                                                       -----------------   -----------------
<S>                                                                                    <C>                 <C>
ASSETS
Current assets:
 Cash and cash equivalents .........................................................    $   13,583,445      $    3,066,953
 Marketable securities available for sale ..........................................                --           2,056,890
 Accounts receivable, net of allowance of $43,386 in 1998...........................         1,430,384           2,662,389
 Inventory .........................................................................                --           1,571,408
 Other current assets ..............................................................           353,266             229,060
 Assets held for disposal ..........................................................           485,170                  --
                                                                                        --------------      --------------
   Total current assets ............................................................        15,852,265           9,586,700
Plant and equipment, net ...........................................................         2,286,024           2,262,130
Other assets .......................................................................            79,167              79,167
                                                                                        --------------      --------------
   Total assets ....................................................................    $   18,217,456      $   11,927,997
                                                                                        ==============      ==============
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
 Accounts payable ..................................................................    $      842,262      $    3,848,853
 Accrued expenses ..................................................................         1,388,933           3,041,859
 Capitalized lease obligation ......................................................           210,499             225,372
                                                                                        --------------      --------------
   Total current liabilities .......................................................         2,441,694           7,116,084
Capitalized lease obligation--net of current portion ...............................           350,670             195,578
Long term convertible note .........................................................                --           8,348,959
                                                                                        --------------      --------------
   Total liabilities ...............................................................         2,792,364          15,660,621
                                                                                        --------------      --------------
Stockholders' equity (deficit):
 Preferred stock, $.01 par value per share
   5,000,000 shares authorized; Series A convertible, redeemable, cumulative
   preferred; 74 shares issued and outstanding at December 31, 1997, plus
   $329,455 accretion premium; none outstanding at December 31, 1998................         4,029,455                  --
 Common stock, $.01 par value per share
   20,000,000 shares authorized at December 31, 1997 and 30,000,000
   shares authorized at December 31, 1998; issued and outstanding 15,427,949
   and 16,612,973 shares at December 31, 1997 and December 31, 1998,
   respectively ....................................................................           154,279             166,130
 Common stock in treasury, at cost - 22,888 shares at December 31, 1997 and none
   at December 31, 1998 ............................................................           (76,535)                 --
 Additional paid-in capital ........................................................       130,838,433         140,714,314
 Accumulated deficit ...............................................................      (119,520,540)       (144,613,068)
                                                                                        --------------      --------------
   Total stockholders' equity (deficit) ............................................        15,425,092          (3,732,624)
                                                                                        --------------      --------------
 Total liabilities and stockholders' equity (deficit) ..............................    $   18,217,456      $   11,927,997
                                                                                        ==============      ==============

</TABLE>

See accompanying notes to consolidated financial statements.

                                      F-3
<PAGE>

                              CELGENE CORPORATION
                     CONSOLIDATED STATEMENTS OF OPERATIONS




<TABLE>
<CAPTION>
                                                                                    --------------------------------
                                                                                      FOR YEARS ENDED DECEMBER 31,
                                                                           --------------------------------------------------
                                                                                       1996             1997             1998
                                                                           ---------------- ---------------- ----------------
<S>                                                                        <C>              <C>              <C>
Revenues:
 Product sales ...........................................................  $      65,000    $          --    $   3,265,490
 Research contracts ......................................................        816,665        1,122,193          535,000
                                                                            -------------    -------------    -------------
   Total revenues ........................................................        881,665        1,122,193        3,800,490
Expenses:
 Cost of goods sold ......................................................             --               --          282,307
 Research and development ................................................     15,152,735       17,380,390       19,771,953
 Selling, general and administrative .....................................      3,770,781        9,145,456       16,218,486
                                                                            -------------    -------------    -------------
   Total expenses ........................................................     18,923,516       26,525,846       36,272,746
                                                                            -------------    -------------    -------------
Operating loss ...........................................................    (18,041,851)     (25,403,653)     (32,472,256)
Other income and expense:
 Interest income .........................................................      1,308,243          495,580          705,215
 Interest expense ........................................................        323,913          111,771          255,832
                                                                            -------------    -------------    -------------
Loss from continuing operations ..........................................    (17,057,521)     (25,019,844)     (32,022,873)
Discontinued operations (note 10):
 Loss from operations ....................................................       (761,461)        (427,183)         (59,837)
 Gain on sale of chiral assets ...........................................             --               --        7,014,830
                                                                            -------------    -------------    -------------
Net loss .................................................................    (17,818,982)     (25,447,027)     (25,067,880)
Accretion of premium payable on preferred stock and
 warrants (note 7) .......................................................      1,012,881          521,397           24,648
Deemed dividend for preferred stock conversion discount (note 7) .........      2,777,777          953,077               --
                                                                            -------------    -------------    -------------
Net loss applicable to common stockholders ...............................  $ (21,609,640)   $ (26,921,501)   $ (25,092,528)
                                                                            =============    =============    =============
Per share basic and diluted (note 2):
 Loss from continuing operations .........................................  $       (1.81)   $       (2.05)   $       (1.98)
 Discontinued operations:
   Loss from operations ..................................................          (0.08)           (0.03)           (0.00)
   Gain on sale of chiral assets .........................................             --               --             0.43
                                                                            -------------    -------------    -------------
 Net loss applicable to common stockholders ..............................  $       (2.29)   $       (2.20)   $       (1.55)
                                                                            =============    =============    =============
Weighted average number of shares of common stock outstanding ............      9,450,000       12,215,000       16,160,000
                                                                            =============    =============    =============
</TABLE>

See accompanying notes to consolidated financial statements.

                                      F-4
<PAGE>

                              CELGENE CORPORATION
           CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT)
                 YEARS ENDED DECEMBER 31, 1996, 1997 AND 1998






<TABLE>
<CAPTION>
                                         -------------------------------------------------------------------
                                         COMMON STOCK             PREFERRED STOCK             TREASURY STOCK
                                   ------------------------- ------------------------- ----------------------------
                                         SHARES       AMOUNT   SHARES           AMOUNT       SHARES          AMOUNT
                                   ------------ ------------ -------- ---------------- ------------ ---------------
<S>                                <C>          <C>          <C>      <C>              <C>          <C>
BALANCES AT JANUARY 1,
 1996 ............................   8,807,863   $  88,079       --    $           --     (24,271)    $      (243)
Exercised stock options ..........      42,069         420
Repurchase of shares .............                                                         (5,714)        (99,996)
Amortization of deferred
 compensation ....................
Conversion of convertible
 debentures ......................     372,681       3,727
Issuance of preferred stock,
 net .............................                              503        25,150,000
Conversion of preferred stock        1,388,809      13,888     (236)      (12,141,309)
Preferred stock lock-up
 warrants ........................
Accretion of premium on
 preferred stock .................                                            874,725
Deemed dividend for
 preferred stock conversion
 discount ........................
Comprehensive Income
 (Loss):
 Net loss ........................
 Net change in unrealized
 gain (loss) on investment
 securities ......................
 Total comprehensive
 income (loss) ...................
                                    ----------   ---------      ---    --------------     -------     -----------
BALANCES AT DECEMBER 31,
 1996 ............................  10,611,422   $ 106,114      267    $   13,883,416     (29,985)    $  (100,239)



<CAPTION>
                                         -------------------------------------------------------------------
                                                                                       ACCUMULATED
                                       ADDITIONAL    UNAMORTIZED                             OTHER
                                          PAID-IN       DEFERRED       ACCUMULATED   COMPREHENSIVE
                                          CAPITAL   COMPENSATION           DEFICIT   INCOME (LOSS)            TOTAL
                                   -------------- -------------- ----------------- --------------- ----------------
<S>                                <C>            <C>            <C>               <C>             <C>
BALANCES AT JANUARY 1,
 1996 ............................  $ 78,064,288    $  (7,085)     $ (70,989,400)     $ (13,138)    $    7,142,501
Exercised stock options ..........       337,521                                                           337,941
Repurchase of shares .............                                                                         (99,996)
Amortization of deferred
 compensation ....................                      5,952                                                5,952
Conversion of convertible
 debentures ......................     2,645,388                                                         2,649,115
Issuance of preferred stock,
 net .............................    (1,320,375)                                                       23,829,625
Conversion of preferred stock         12,127,421                                                                --
Preferred stock lock-up
 warrants ........................       138,156                        (138,156)                               --
Accretion of premium on
 preferred stock .................                                      (874,725)                               --
Deemed dividend for
 preferred stock conversion
 discount ........................     2,777,777                      (2,777,777)                               --
Comprehensive Income
 (Loss):
 Net loss ........................                                   (17,818,981)                      (17,818,981)
 Net change in unrealized
 gain (loss) on investment
 securities ......................                                                       18,852             18,852
                                                                                                    --------------
 Total comprehensive
 income (loss) ...................                                                                      17,800,129
                                                                                      ---------     --------------
BALANCES AT DECEMBER 31,
 1996 ............................  $ 94,770,176    $  (1,133)     $ (92,599,039)     $   5,714     $   16,065,009
</TABLE>

See accompanying notes to consolidated financial statements.

                                      F-5
<PAGE>

                              CELGENE CORPORATION
           CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT)
           YEARS ENDED DECEMBER 31, 1996, 1997 AND 1998 (CONTINUED)






<TABLE>
<CAPTION>
                                            ------------------------------------------------------------------
                                          COMMON STOCK             PREFERRED STOCK               TREASURY STOCK
                                    ------------------------ ---------------------------- ----------------------------
                                          SHARES      AMOUNT      SHARES           AMOUNT       SHARES          AMOUNT
                                    ------------ ----------- ----------- ---------------- ------------ ---------------
<S>                                 <C>          <C>         <C>         <C>              <C>          <C>
BALANCES AT DECEMBER 31,
 1996 .............................  10,611,422   $ 106,114        267    $   13,883,416     (29,985)    $  (100,239)
Exercised stock options ...........       2,986          30
Shares issued in lieu of cash
 bonus ............................       5,000          50
Amortization of deferred
 compensation .....................
Conversion of convertible
 debenture ........................     441,248       4,412
Issuance of Series B Preferred
 Stock-net ........................                              5,000         4,046,923
Conversion of preferred stock .....   2,166,193      21,662     (5,180)      (14,654,071)
Accretion of premium on
 preferred stock ..................                                              521,397
Redemption of preferred stock .....                                (13)         (721,287)
Deemed dividend on Series B
 Preferred Stock and fair value
 of warrants ......................                                              953,077
Comprehensive Income (Loss):
 Net loss .........................
Net change in unrealized
 gain (loss) on investment
 securities .......................
Total comprehensive income
 (loss) ...........................
Treasury shares issued ............                                                            7,097          23,704
Issuance of common stock, net .....   2,201,100      22,011
                                     ----------   ---------         --    --------------     -------     -----------
BALANCES AT DECEMBER 31,
 1997 .............................  15,427,949   $ 154,279         74    $    4,029,455     (22,888)    $   (76,535)



<CAPTION>
                                           ------------------------------------------------------------------
                                                                                          ACCUMULATED
                                         ADDITIONAL    UNAMORTIZED                              OTHER
                                            PAID-IN       DEFERRED        ACCUMULATED   COMPREHENSIVE
                                            CAPITAL   COMPENSATION            DEFICIT   INCOME (LOSS)           TOTAL
                                    --------------- -------------- ------------------ --------------- ---------------
<S>                                 <C>             <C>            <C>                <C>             <C>
BALANCES AT DECEMBER 31,
 1996 .............................  $  94,770,176    $  (1,133)     $  (92,599,039)     $  5,714      $  16,065,009
Exercised stock options ...........         20,187                                                            20,217
Shares issued in lieu of cash
 bonus ............................         55,575                                                            55,625
Amortization of deferred
 compensation .....................                       1,133                                                1,133
Conversion of convertible
 debenture ........................      2,326,892                                                         2,331,304
Issuance of Series B Preferred
 Stock-net ........................        793,825                                                         4,840,748
Conversion of preferred stock .....     14,632,409                                                                --
Accretion of premium on
 preferred stock ..................                                        (521,397)                              --
Redemption of preferred stock .....                                                                         (721,287)
Deemed dividend on Series B
 Preferred Stock and fair value
 of warrants ......................                                        (953,077)                              --
Comprehensive Income (Loss):
 Net loss .........................                                     (25,447,027)                     (25,447,027)
Net change in unrealized
 gain (loss) on investment
 securities .......................                                                        (5,714)            (5,714)
                                                                                                       -------------
Total comprehensive income
 (loss) ...........................                                                                      (25,452,741)
                                                                                                       -------------
Treasury shares issued ............         55,250                                                            78,954
Issuance of common stock, net .....     18,184,119                                                        18,206,130
                                     -------------    ---------      --------------      --------      -------------
BALANCES AT DECEMBER 31,
 1997 .............................  $ 130,838,433    $      --      $ (119,520,540)     $     --      $  15,425,092
</TABLE>

See accompanying notes to consolidated financial statements.


                                      F-6
<PAGE>

                              CELGENE CORPORATION
           CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT)
           YEARS ENDED DECEMBER 31, 1996, 1997 AND 1998 (CONTINUED)







<TABLE>
<CAPTION>
                                   -------------------------------------------------------------------
                                     COMMON STOCK           PREFERRED STOCK            TREASURY STOCK
                               ------------------------ ------------------------ --------------------------
                                     SHARES      AMOUNT   SHARES          AMOUNT       SHARES        AMOUNT
                               ------------ ----------- -------- --------------- ------------ -------------
<S>                            <C>          <C>         <C>      <C>             <C>          <C>
BALANCES AT
 DECEMBER 31, 1997 ...........  15,427,949   $154,279       74    $   4,029,455     (22,888)    $ (76,535)
Exercised stock options ......     283,120      2,831
Exercise of warrants .........     118,230      1,183
Costs related to secondary
 offering ....................
Conversion of preferred
 stock .......................     575,669      5,757      (74)      (4,054,103)
Accretion of premium on
 preferred stock .............                                           24,648
Shares issued for employee
 benefit plans ...............       8,317         83                                22,888        76,535
Stock purchase ...............     199,688      1,997
Net loss and comprehensive
 loss ........................
                                ----------   --------      ---    -------------     -------     ---------
BALANCES AT
 DECEMBER 31, 1998 ...........  16,612,973   $166,130       --    $          --          --     $      --
                                ==========   ========      ===    =============     =======     =========



<CAPTION>
                                      -------------------------------------------------------------------
                                                                                     ACCUMULATED
                                    ADDITIONAL    UNAMORTIZED                              OTHER
                                       PAID-IN       DEFERRED        ACCUMULATED   COMPREHENSIVE
                                       CAPITAL   COMPENSATION            DEFICIT   INCOME (LOSS)            TOTAL
                               --------------- -------------- ------------------ --------------- ----------------
<S>                            <C>             <C>            <C>                <C>             <C>
BALANCES AT
 DECEMBER 31, 1997 ...........  $130,838,433        $ --        $ (119,520,540)        $ --       $  15,425,092
Exercised stock options ......     2,028,715                                                          2,031,546
Exercise of warrants .........       986,883                                                            988,066
Costs related to secondary
 offering ....................       (73,136)                                                           (73,136)
Conversion of preferred
 stock .......................     4,048,346                                                                 --
Accretion of premium on
 preferred stock .............                                         (24,648)                              --
Shares issued for employee
 benefit plans ...............       387,070                                                            463,688
Stock purchase ...............     2,498,003                                                          2,500,000
Net loss and comprehensive
 loss ........................                                     (25,067,880)                     (25,067,880)
                                ------------        ----        --------------         ----       -------------
BALANCES AT
 DECEMBER 31, 1998 ...........  $140,714,314        $ --        $ (144,613,068)        $ --       $  (3,732,624)
                                ============        ====        ==============         ====       =============
</TABLE>

See accompanying notes to consolidated financial statements.

                                      F-7
<PAGE>

                              CELGENE CORPORATION
                     CONSOLIDATED STATEMENTS OF CASH FLOWS




<TABLE>
<CAPTION>
                                                                             -------------------------------------
                                                                                    YEARS ENDED DECEMBER 31,
                                                                  ------------------------------------------------------------
                                                                                1996                 1997                 1998
                                                                  ------------------   ------------------   ------------------
<S>                                                               <C>                  <C>                  <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
Loss from continuing operations ...............................     $  (17,057,521)    $ (25,019,844)       $ (32,022,873)
Adjustments to reconcile loss from continuing
 operations to net cash used in operating activities:
 Depreciation .................................................            362,590            380,364              812,555
 Provision for losses on accounts receivable ..................                 --                 --               43,386
 Amortization of convertible debt costs .......................            234,540            126,577                   --
 Amortization of deferred compensation ........................              5,952              1,133                   --
 Interest on convertible debentures ...........................            323,914             68,736                   --
 Issuance of stock award ......................................                 --             55,625                   --
 Shares issued for employee benefit plans .....................                 --             78,954              463,688
Change in current assets & liabilities:
 Increase in Inventory ........................................                 --                 --          (1,571,408)
 Increase (decrease) in accounts payable and accrued
   expenses ...................................................            216,226          (379,091)            4,659,517
 (Increase) decrease in accounts receivable ...................             18,646        (1,051,789)          (1,275,391)
 (Increase) decrease in other assets ..........................           (256,586)           150,304              124,206
                                                                    --------------      -------------        -------------
Net cash used in continuing operations ........................        (16,152,239)      (25,589,031)         (28,766,320)
Net cash used in discontinued operations ......................           (491,872)         (302,996)             (59,837)
                                                                    --------------     -------------        -------------
Net cash used in operating activities .........................        (16,644,111)      (25,892,027)         (28,826,157)
                                                                    --------------     -------------        -------------
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures ..........................................         (1,340,232)       (1,240,775)            (788,661)
Proceeds from sales and maturities of marketable
 securities available for sale ................................        137,051,037         47,470,593            8,559,604
Purchases of marketable securities available for sale .........       (142,548,468)      (30,584,284)         (10,616,494)
Proceeds from sale of chiral assets ...........................                 --                 --            7,500,000
                                                                    --------------      -------------        -------------
Net cash provided by (used in) investing activities ...........         (6,837,663)        15,645,534            4,654,449
                                                                    --------------      -------------        -------------
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from secondary offering ..........................                 --         18,206,130                   --
Costs related to secondary offering ...........................                 --                 --             (73,136)
Proceeds from sale of stock ...................................                 --                 --            2,500,000
Proceeds from exercise of common stock options and
 warrants .....................................................            237,946             20,217            3,019,612
Redemption of Series A preferred stock ........................                 --          (721,287)                   --
Net proceeds from issuance of preferred stock .................         23,829,624          4,840,748                   --
Capital lease buyout ..........................................                 --                 --            (400,414)
Capital lease funding .........................................                 --            561,169              260,195
Proceeds from convertible note, net ...........................                 --                 --            8,348,959
                                                                    --------------      -------------        -------------
Net cash provided by financing activities .....................         24,067,570         22,906,977           13,655,216
                                                                    --------------      -------------        -------------
Net (decrease) increase in cash and cash equivalents ..........            585,796         12,660,484         (10,516,492)
Cash and cash equivalents at beginning of year ................            337,165            922,961           13,583,445
                                                                    --------------      -------------        -------------
Cash and cash equivalents at end of year ......................     $      922,961     $  13,583,445        $   3,066,953
                                                                    ==============     =============        =============
</TABLE>

See accompanying notes to consolidated financial statements.


                                      F-8
<PAGE>

                              CELGENE CORPORATION
               CONSOLIDATED STATEMENTS OF CASH FLOWS (CONTINUED)




<TABLE>
<CAPTION>
                                                                                  -------------------------------
                                                                                     YEARS ENDED DECEMBER 31,
                                                                         -------------------------------------------------
                                                                                   1996              1997             1998
                                                                         --------------   ---------------   --------------
<S>                                                                      <C>              <C>               <C>
NON-CASH INVESTING ACTIVITY:
Charge in net unrealized gain (loss) on marketable securities
 available for sale ..................................................    $    18,852       $    (5,714)     $        --
                                                                          ===========       ===========      ===========
NON-CASH FINANCING ACTIVITIES:
Issuance of common stock upon the conversion of convertible
 debentures and accrued interest thereon, net ........................    $ 2,649,115       $ 2,331,304      $        --
                                                                          ===========       ===========      ===========
Accretion of premium payable on preferred stock and warrants .........    $ 1,012,881       $   521,397      $    24,648
                                                                          ===========       ===========      ===========
Deemed dividend for preferred stock conversion discount ..............    $ 2,777,777       $   953,077      $        --
                                                                          ===========       ===========      ===========
Issuance of common stock upon the conversion of convertible
 preferred stock and accrued accretion thereon, net ..................    $12,141,309       $14,654,071      $ 4,054,103
                                                                          ===========       ===========      ===========
Issuance of common stock upon exercise of options through the
 return of common stock previously outstanding .......................    $    99,996       $        --      $        --
                                                                          ===========       ===========      ===========
INTEREST PAID ........................................................    $        --       $    20,599      $    19,766
                                                                          ===========       ===========      ===========
</TABLE>

See accompanying notes to consolidated financial statements.

                                      F-9
<PAGE>

                              CELGENE CORPORATION
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                       DECEMBER 31, 1996, 1997 AND 1998

(1) NATURE OF BUSINESS AND LIQUIDITY

Celgene  Corporation and its subsidiary  Celgro  (collectively  "Celgene" or the
"Company") is a specialty  pharmaceutical company engaged in the development and
commercialization  of human  pharmaceuticals and agrochemicals,  and employs two
broad  technology  platforms:  (i)  small  molecule  immunotherapeutic  compound
development and (ii)  biocatalytic  chiral  chemistry.  The initial  therapeutic
focus  of  the  immunology   program  is  the   development  of  small  molecule
pharmaceuticals  that have the potential to selectively  regulate Tumor Necrosis
Factor alpha  ("TNF(alpha)"),  a protein whose overproduction has been linked to
many  chronic  inflammatory  and  immunological  diseases.  The  Company's  lead
compound in immunology is THALOMID(Reg.  TM), its formulation of thalidomide,  a
potent yet  selective  inhibitor of  TNF(alpha).  On July 16, 1998,  the Company
received an approval from the United States Food and Drug Administration ("FDA")
to market THALOMID for the treatment of erythema  nodosum leprosum  ("ENL"),  an
inflammatory  complication  of  leprosy,  and  commenced  sales  at  the  end of
September 1998. The Company expects to submit an additional New Drug Application
("NDA") in 2000 to market THALOMID in the treatment of multiple myeloma, a blood
related  cancer.  Celgene has further  applied its  expertise in small  molecule
chemistry  to  develop  novel  and  proprietary  thalidomide  analogues,  called
IMiDs(TM)  ("ImmunoModulatory  Drugs"),  as  well  as  a  class  of  proprietary
immunotherapeutic   pharmaceutical   compounds  called  SelCIDs(TM)  ("Selective
Cytokine  Inhibitory  Drugs").   These  two  classes  of  compounds  are  orally
administered  small  molecules that are highly  specific for the  suppression of
TNF(alpha)  and are intended to treat  chronic  inflammatory  diseases and other
disorders.

The  Company  expects  that  its rate of spending will increase as the result of
increased  clinical  trial  costs  and  expenses  associated with the regulatory
approval  process  and  commercialization  of  products  now  in development and
increased  commercial  costs  related  to  the  launch  of THALOMID. In order to
assure  funding  for  the  Company's  future operations, the Company may need to
seek  additional capital resources. However, no assurances can be given that the
Company  will  be successful in raising additional capital. The Company believes
that  its  current  financial  resources  including  $15.0  million  received in
January  1999  for  a  convertible note issued to an institutional investor plus
the revenues from the sales of THALOMID will fund operations through 1999.

The  consolidated  financial  statements  include  the  parent  Company  and its
subsidiary  Celgro.  All  inter-company  transactions  have been eliminated. The
preparation  of  the  consolidated  financial  statements requires management to
make  estimates  and  assumptions  that affect reported amounts and disclosures.
Actual  results  could  differ  from  those estimates. The Company is subject to
certain  risks  and  uncertainties  such  as uncertainty of product development,
uncertainties  regarding  regulatory approval, no assurance of market acceptance
of   products,  risk  of  product  liability,  uncertain  scope  of  patent  and
proprietary rights, intense competition, and rapid technological change.


(2) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

(a) Cash Equivalents

At  December  31, 1997 and 1998, cash equivalents consisted principally of funds
invested  in money market funds, and United States government securities such as
treasury bills and notes.

(b) Marketable Securities

The  Company  has  classified  all  of  its  marketable securities as securities
available  for sale at December 31, 1998. Such securities were to be held for an
indefinite  period  of  time  and  were  intended to be used to meet the ongoing
liquidity  needs  of  the  Company.  Realized  gains  and losses are included in
operations and are measured using the specific cost identification method.


                                      F-10
<PAGE>

                              CELGENE CORPORATION
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                  DECEMBER 31, 1996, 1997 AND 1998 (CONTINUED)

(2) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

(c) Inventory

Inventories  are priced at lower of cost or market using the first-in, first-out
("FIFO")  method.  The  cost of inventory reflects primarily the packaging costs
for  a  significant  portion  of  the  finished  goods  inventory.  Prior to FDA
approval,  the raw material, formulation and encapsulation costs are recorded as
research and development expense.

(d) Long-Lived Assets

Plant  and  equipment are stated at cost. Depreciation of plant and equipment is
provided  using  the  straight-line  method. The estimated useful lives of fixed
assets are as follows:



<TABLE>
<S>                                  <C>
  Laboratory equipment and
  machinery ......................   5-10 years
  Furniture and fixtures .........   5-10 years

</TABLE>

Amortization  of  leasehold  improvements  is calculated using the straight-line
method  over  the  term  of  the  lease  or  the life of the asset, whichever is
shorter.  Maintenance  and  repairs are charged to operations as incurred, while
renewals and improvements are capitalized.

The  Company reviews long-lived assets for impairment whenever events or changes
in  business  circumstances  occur that indicate that the carrying amount of the
assets  may  not  be  recoverable.  The  Company  assesses the recoverability of
long-lived  assets  held  and  to  be  used based on undiscounted cash flows and
measures the impairment, if any, using discounted cash flows.

(e) Research and Development Costs

All research and development costs are expensed as incurred.

(f) Income Taxes

The  Company  utilizes  the  asset and liability method of accounting for income
taxes.  Under  this  method,  deferred tax assets and liabilities are determined
based  on  the  difference  between the financial statement carrying amounts and
tax  bases  of  assets and liabilities using enacted tax rates in effect for all
years in which the temporary differences are expected to reverse.

Research  and  development  tax credits will be recognized as a reduction of the
provision for income taxes when realized.

(g) Revenue Recognition

Revenue  from  the sale of products is recognized upon product shipment. Revenue
under  research  contracts  is recorded as earned under the contracts, generally
as  services  are  provided. Revenue is recognized immediately for nonrefundable
license  fees when agreement terms require no additional performance on the part
of the Company.

(h) Stock Options

The  Company  generally  does  not  record compensation cost for the issuance of
employee  stock  options since the options are generally issued with an exercise
price  equal to the market price at the date of grant. For the fair value of the
employee stock options issued in 1996, 1997 and 1998, see note 8.


                                      F-11
<PAGE>

                              CELGENE CORPORATION
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                  DECEMBER 31, 1996, 1997 AND 1998 (CONTINUED)

(2) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

(i) Earnings per Share

"Basic"  earnings per common share equals net income divided by weighted average
common  shares  outstanding  during  the  period.  "Diluted" earnings per common
share  equals  net  income  divided by the sum of weighted average common shares
outstanding  during  the  period  plus common stock equivalents if dilutive. The
Company's  basic  and  diluted  per share amounts are the same since the assumed
exercise  of  stock  options, warrants, conversion of convertible debentures and
preferred  stock  are  all anti-dilutive. The amount of common stock equivalents
excluded  from  the  calculation  were 3,738,168 in 1996, 3,770,954 in 1997, and
3,863,535 in 1998.

(j) Comprehensive Income

On  January  1,  1998,  the  Company  adopted  Statement of Financial Accounting
Standard  ("SFAS")  No.  130,  Reporting  Comprehensive  Income.  SFAS  No.  130
establishes  standards  for  reporting  and presentation of comprehensive income
and  its  components in a full set of financial statements. Comprehensive income
(loss)  consists  of  net losses and net unrealized gains (losses) on securities
and  is  presented  in  the  consolidated  statements  of  stockholders'  equity
(deficit).  The  Statement requires only additional disclosures in the financial
statements;  it  does  not affect the Company's financial position or results of
operations.  Prior  year  financial statements have been reclassified to conform
to the requirements of SFAS No. 130.

(k) Presentation

In  connection  with  the  disposition  of  the  Company's  chiral  intermediate
operation  (see  note 10), the 1996, 1997, and 1998 financial results applicable
to continuing operations exclude amounts from this discontinued operation.

(l) Fair Value of Financial Instruments

The  fair value, which is the carrying value, of marketable securities available
for   sale  is  based  on  quoted  market  prices.  The  convertible  debentures
approximate  fair  value  due  to interest rates approximating market rates. For
all  other  financial  instruments  their carrying value approximates fair value
due to the short maturity of these instruments.


(3) INVENTORY




<TABLE>
<CAPTION>
                          ---------
                           DECEMBER 31,
                                   1998
                          -------------
<S>                       <C>
Raw materials ...........  $  440,400
Work in process .........     535,494
Finished goods ..........     595,514
                           ----------
Total ...................  $1,571,408
                           ==========
</TABLE>

Inventory  costs  prior  to  FDA  approval  of  THALOMID  on  July 16, 1998 were
expensed as research and development costs.

                                      F-12
<PAGE>

                              CELGENE CORPORATION
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                 DECEMBER 31, 1996, 1997 AND 1998 (CONTINUED )

(4) PLANT AND EQUIPMENT

Plant and equipment consists of the following:



<TABLE>
<CAPTION>
                                                   -----------------
                                                     DECEMBER 31,
                                             -----------------------------
                                                       1997           1998
                                             -------------- --------------
<S>                                          <C>            <C>
Leasehold improvements .....................  $ 3,957,366    $ 4,008,246
Laboratory equipment and machinery .........    4,430,336      4,874,733
Furniture and fixtures .....................      437,478        470,667
Leased equipment ...........................      415,109        675,304
                                              -----------    -----------
                                                9,240,289     10,028,950
Less: accumulated depreciation .............    6,954,265      7,766,820
                                              -----------    -----------
                                              $ 2,286,024    $ 2,262,130
                                              ===========    ===========
</TABLE>

(5) ACCRUED EXPENSES

Accrued expenses consists of the following:




<TABLE>
<CAPTION>
                                                 -----------------
                                                   DECEMBER 31,
                                           -----------------------------
                                                     1997           1998
                                           -------------- --------------
<S>                                        <C>            <C>
Professional and consulting fees .........  $   235,000    $   787,381
Accrued compensation .....................    1,041,772      1,650,048
Other ....................................      112,161        604,430
                                            -----------    -----------
                                            $ 1,388,933    $ 3,041,859
                                            ===========    ===========
</TABLE>

(6) CONVERTIBLE DEBT

On   September   16,   1998,  the  Company  issued  a  convertible  note  to  an
institutional  investor  in  the  amount of $8,750,000. The note has a five-year
term  and  a  coupon rate of 9.25% with interest payable on a semi-annual basis.
The  note  contains  a conversion feature that allows the note holder to convert
the  note  into  shares  of  common  stock  after one year at $11 per share. The
Company  can  redeem  the note after three years at 103% of the principal amount
(two  years if the Company's stock trades at $24.75 or higher for a period of 20
consecutive  trading days). This note was issued at a discount of $437,500 which
is being amortized over three years.

During  1995, the Company issued and sold, in an offering pursuant to Regulation
S,  8%  convertible  debentures  due  July  31,  1997 in the aggregate principal
amount  of  $12,000,000,  and  received  net  proceeds, after offering costs, of
$11,022,570.  The  recorded  value of the debentures at the date of issuance was
discounted  to  produce  a  market  interest  rate of approximately 13.5%. As of
December  31, 1997, all convertible debentures in the aggregate principal amount
of  $12,000,000,  plus  accrued  interest,  had  been  converted into a total of
1,709,845 shares of common stock.


(7) STOCKHOLDERS' EQUITY

Series A Convertible Preferred Stock

On  March  13,  1996,  in a private placement, the Company completed the sale of
503  shares  of  Series  A Convertible Preferred Stock, par value $.01 per share
(the  "Preferred  Stock"),  at  an issue price of $50,000 per share. The Company
received  net  proceeds,  after  offering  costs,  of $23,829,625. The Preferred
Stock,  plus  accretion  at  a  rate  of  4.9% per year, was convertible, at the
option  of the holders thereof, into common stock of the Company at a conversion
price  per  share  of common stock equal, generally, to the lesser of (i) $18.81
or  (ii)  90% of the average closing price per share of the common stock for the
seven  trading  days immediately prior to the date of conversion. As a result of
the  issuance  of  securities  with  variable  conversion  features, the Company
recognized  the  value  of the discount to market conversion feature as a deemed
dividend.


                                      F-13
<PAGE>

                              CELGENE CORPORATION
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                  DECEMBER 31, 1996, 1997 AND 1998 (CONTINUED)

(7) STOCKHOLDERS' EQUITY (CONTINUED)

In  connection  with  the private placement, the Company also granted to certain
executives  and  affiliates  of the placement agent warrants, valued at $60,168,
to  purchase  an aggregate of 66,853 shares of common stock at an exercise price
of  $20.52,  subject  to  proportional  adjustment in the event that the Company
undertakes  a  stock  split,  stock dividend, recapitalization or similar event.
These  warrants  are  exercisable  for  a  period of five years from the date of
issuance. These warrants are all outstanding at December 31, 1998.

As  of December 31, 1998, all of the shares of the Series A Preferred Stock (503
shares),  with  their  respective  accrued  accretion,  had  been  converted  or
redeemed  into  3,342,202  shares of common stock. Through December 31, 1998 the
Company  had  accrued  $1,420,770  representing  accretion of the premium on the
Preferred  Stock.  The  Company agreed to reduce the maximum conversion price of
58  shares to $8.50 per share of common stock from $18.81 for holders who agreed
to  a  lock-up  ending  on  December  1, 1997. During 1996, the Company had also
issued  warrants  valued  at  $138,156, that entitle certain stockholders of the
Series  A  Preferred  Stock  to  purchase  153,507  shares of common stock at an
exercise  price  of  $11.50  per share. The warrants were issued in exchange for
the  deferral  of  conversion  for  90  days.  At  December  31, 1998, all these
warrants either expired or were exercised for 3,418 shares of common stock.

Series B Convertible Preferred Stock

On  June  9,  1997,  in  a  private placement, the Company completed the sale of
5,000   shares   of   Series  B  Convertible  Preferred  Stock  (the  "Series  B
Preferred"),  par  value  $.01 per share, at an issue price of $1,000 per share.
The  Company  received net proceeds, after offering costs, of $4,840,748. Shares
could  be  converted  at  an  initial conversion price of $6.50 per share. As of
December  31, 1998, all shares of the Series B Preferred had been converted into
788,469 shares of common stock.

Upon  request  of  the  purchasers  of  the  Series  B Preferred, the Company is
required  to  issue warrants to acquire a number of shares of common stock equal
to  (i) 1,500,000 divided by the conversion price in effect on the issuance date
(230,769  warrants  as  of  December 31, 1998) plus (ii) 37.5% of the conversion
shares  issuable on such issuance date upon conversion of all shares of Series B
Preferred  Stock  issued  through  the  issuance  date  (288,461  warrants as of
December  31,  1998).  All such warrants will have a term of four years from the
issuance  date  and  an  exercise price equal to 115% of the conversion price in
effect  on  the  issuance  date  ($6.50 at December 31, 1998). The fair value of
warrants  at  the  issuance date was $1.28 per warrant. As of December 31, 1998,
no warrants had been issued.

Through  December  31,  1998,  the  Company  had  recorded $953,077 representing
accretion  of  the  deemed  dividend on the Series B Preferred Stock. The deemed
dividend  represents  the  difference  between  the  Series  B  Preferred  Stock
conversion  price and the fair market value of the Company's common stock at the
date of issuance.

Preferred Stock

Moreover,  the  board  of  directors  has  the  authority to issue, at any time,
without  further  stockholder  approval,  up  to  5,000,000  shares of preferred
stock,  and to determine the price, rights, privileges, and preferences of those
shares.

Rights Plan

During  1996, the Company adopted a shareholder rights plan ("Rights Plan"). The
Rights  Plan  involves  the  distribution  of  one "Right" as a dividend on each
outstanding  share  of  the  Company's  common stock to each holder of record on
September  26,  1996.  Each Right shall entitle the holder to purchase one-tenth
of  a  share  of  common stock. The Rights trade in tandem with the common stock
until,  and  are  exercisable  upon, certain triggering events, and the exercise
price is based on the estimated long term value of the Company's common stock.


(8) STOCK BASED COMPENSATION

(a) Stock Options

The  Company  has  two incentive plans that provide for the granting of options,
restricted  stock  awards,  stock  appreciation  rights,  performance awards and
other  stock-based  awards  to employees and officers of the Company to purchase
not  more  than  an aggregate of 1,400,000 shares of common stock under the 1992
plan and 1,500,000 shares of common stock under


                                      F-14
<PAGE>

                              CELGENE CORPORATION
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                  DECEMBER 31, 1996, 1997 AND 1998 (CONTINUED)

(8) STOCK BASED COMPENSATION (CONTINUED)

the   1998   plan,  subject  to  adjustment  under  certain  circumstances.  The
Management  Compensation  and  Development  Committee  of the Board of Directors
(the  "Committee")  determines the type, amount and terms, including vesting, of
any  awards  made  under  the  Incentive  Plans. The plans terminate in 2002 and
2008, respectively.

With  respect  to  options granted under the incentive plans, the exercise price
may  not  be  less than the fair market value of the common stock on the date of
grant.  In  general,  each  option  granted  under the Plans vests evenly over a
three  or  four year period and expires 10 years from the date of grant, subject
to  earlier  expiration in case of termination of employment. The vesting period
for  options  and  restricted stock awards granted under the Plans is subject to
certain  acceleration  provisions  if  a  change  in  control, as defined in the
Plans, occurs.

On June 16, 1995, the stockholders of the Company approved the 1995 Non-Employee
Directors'  Incentive  Plan,  which  provides for the granting of  non-qualified
stock options to purchase an aggregate of not more than 350,000 shares of common
stock (subject to adjustment  under certain  circumstances)  to directors of the
Company  who  are  not  officers  or  employees  of the  Company  ("Non-Employee
Directors").  Each new Non-Employee  Director,  upon the date of his election or
appointment,  receives  an option to  purchase  20,000  shares of common  stock.
Additionally,  upon  the  date of each  annual  meeting  of  stockholders,  each
continuing Non-Employee Director receives an option to purchase 10,000 shares of
common  stock (or a pro rata  portion  thereof  if he has  served  less than one
year). The shares subject to each non-employee director's option grant of 20,000
shares  vest  in  four  equal  annual  installments   commencing  on  the  first
anniversary of the date of grant. The shares subject to an annual meeting option
grant vest in full on the date of the first annual meeting of stockholders  held
following the date of grant.  All options are granted at an exercise  price that
equals the fair market value of the Company's common stock at the grant date and
expire 10 years  after the date of grant.  This  plan  terminates  in 2005.  The
weighted-average  fair value per share for stock  options  granted was $3.97 for
the 1998  options,  $3.93 for the 1997  options,  and $5.01 for those granted in
1996.  The Company  estimated  the fair values  using the  Black-Scholes  option
pricing model and used the following assumptions:



<TABLE>
<CAPTION>
                                                         -------------------
                                                       1996         1997         1998
                                                 ----------   ----------   ----------
<S>                                              <C>          <C>          <C>
Risk-free interest rate ......................       6.38%        6.37%        5.68%
Expected stock price volatility ..............         62%          55%          66%
Expected term until exercise (years) .........       2.22         3.09         2.86
Expected dividend yield ......................          0%           0%           0%
</TABLE>

The  Company  does  not record compensation expense for stock option grants. The
following  table  summarizes results as if compensation expense was recorded for
the annual option grants under the fair value method:




<TABLE>
<CAPTION>
                                                            ---------------------
                                                          1996           1997           1998
In thousands of dollars, except per share data   ------------- -------------- --------------
<S>                                              <C>           <C>            <C>
Net loss applicable to common stockholders:
 As reported ...................................   $ (21,610)    $  (26,922)    $  (25,093)
 Pro forma .....................................   $ (23,515)    $  (28,652)    $  (26,745)
Per share basic and diluted:
 As reported ...................................   $   (2.29)    $    (2.20)    $    (1.55)
 Pro forma .....................................   $   (2.49)    $    (2.35)    $    (1.66)

</TABLE>

The  pro  forma  effects  on net loss and loss per share for 1996, 1997 and 1998
may  not  be  representative  of  the  pro  forma  effects in future years since
compensation  cost  is  allocated  on  a  straight-line  basis  over the vesting
periods of the grants, which extends beyond the reported years.

                                      F-15
<PAGE>

                              CELGENE CORPORATION
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                  DECEMBER 31, 1996, 1997 AND 1998 (CONTINUED)

(8) STOCK BASED COMPENSATION (CONTINUED)

The following table summarizes the stock option activity for both Plans:




<TABLE>
<CAPTION>
                                            ---------------------
                                                    OPTIONS OUTSTANDING
                                                  ------------------------
                                                                  WEIGHTED
                                           SHARES                  AVERAGE
                                        AVAILABLE                PRICE PER
                                        FOR GRANT        SHARES      SHARE
                                    ------------- ------------- ----------
<S>                                 <C>           <C>           <C>
Balance January 1, 1996 ...........   1,201,913     1,415,341    $   7.70
 Expired ..........................    (126,126)           --          --
 Granted ..........................    (679,037)      679,037       13.25
 Exercised ........................          --       (42,069)       8.03
 Cancelled ........................      46,095       (46,095)       6.40
                                      ---------     ---------    --------
Balance December 31, 1996 .........     442,845     2,006,214        9.60
 Authorized .......................     500,000            --          --
 Expired ..........................     (74,797)           --          --
 Granted ..........................    (492,775)      492,775        9.39
 Exercised ........................          --        (6,986)       7.83
 Cancelled ........................     142,027      (142,027)       9.36
                                      ---------     ---------    --------
Balance December 31, 1997 .........     517,300     2,349,976        9.59
 Authorized .......................   1,620,000            --          --
 Expired ..........................     (85,095)           --          --
 Granted ..........................    (559,983)      559,983        8.87
 Exercised ........................          --      (283,120)       7.18
 Cancelled ........................     198,726      (198,726)      10.74
                                      ---------     ---------    --------
Balance December 31, 1998 .........   1,690,948     2,428,113    $   9.62
                                      =========     =========    ========
</TABLE>

The  following table summarizes information concerning options outstanding under
the Plans at December 31, 1998:




<TABLE>
<CAPTION>
                                       ------------------------------------------------
                               OPTIONS OUTSTANDING                         OPTIONS EXERCISABLE
                            --------------------------                 ---------------------------
                                                            WEIGHTED
                                              WEIGHTED       AVERAGE                      WEIGHTED
                                   NUMBER      AVERAGE     REMAINING          NUMBER       AVERAGE
                              OUTSTANDING     EXERCISE          TERM     EXERCISABLE      EXERCISE
                              AT 12/31/98        PRICE        (YRS.)     AT 12/31/98         PRICE
RANGE OF EXERCISE PRICE     -------------   ----------   -----------   -------------   -----------
<S>                         <C>             <C>          <C>           <C>             <C>
$ 5.00-9.00 .............     1,350,740      $  7.48          5.6          863,361      $   7.12
$ 9.01-13.00 ............       610,644        10.74          7.6          298,854         10.81
$13.01-18.00 ............       466,729        14.31          6.9          405,319         14.12
                              ---------      -------          ---          -------      --------
                              2,428,113      $  9.62          6.6        1,567,534      $   9.63
                              =========      =======          ===        =========      ========
</TABLE>

On  January  22,  1999  the  Company  granted  options to purchase approximately
105,000  shares  to  certain members of management exercisable at $16.50 (market
price  at  the  date  of  grant). These options vest evenly over three years and
have  a  ten-year term. Also on January 22, 1999, the Company granted options to
purchase  approximately 140,000 shares to certain employees at an exercise price
of $16.50. The options vest equally over four years and have a ten-year term.

(b) Stock Awards

On  January  1, 1997, the Company awarded 5,000 shares to the Company's Chairman
and  Chief  Executive  Officer, which were immediately vested. The fair value of
$55,625 for this award was expensed.

(c) Warrants

In  connection  with  the  retention of an investment firm to assist in the sale
and  issuance  of  8% convertible notes, the Company, in August 1995, granted to
such  firm  warrants  to  purchase until July 31, 2000, 105,000 shares of common
stock  at  a  price of $9.60 per share. As of December 31, 1998, 40,188 warrants
were outstanding.


                                      F-16
<PAGE>

                              CELGENE CORPORATION
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                  DECEMBER 31, 1996, 1997 AND 1998 (CONTINUED)

(8) STOCK BASED COMPENSATION (CONTINUED)

In  connection  with  the  retention of an investment firm to assist in the sale
and  issuance  of  the  Series  A  Preferred  Stock, the Company, in March 1996,
granted  to  such  firm warrants to purchase until March 10, 2001, 66,853 shares
of  common  stock  at  a  price of $20.52. These warrants were outstanding as of
December 31, 1998.

During  1997,  the  Company  issued  to  certain  stockholders  of  the Series A
Convertible  Preferred Stock warrants valued at $7,826, to purchase 8,696 shares
of  common  stock  at  an  exercise price of $11.50. The warrants were issued in
exchange  for  the  deferral  of  conversion  for  90  days.  These warrants are
exercisable  for  a  period  of  two  years  from the date of issuance and these
warrants were outstanding as of December 31, 1998.

In   connection  with  the  retention  of  a  consultant  to  provide  strategic
development  services, the Company, in December 1997, granted to such consultant
warrants  to purchase until December 24, 1999, 5,000 shares of common stock at a
price of $12.00. These warrants were outstanding as of December 31, 1998.


(9) INCOME TAXES

At  December  31,  1997  and 1998, the tax effects of temporary differences that
give rise to deferred tax assets are as follows:




<TABLE>
<CAPTION>
                                                                                 -------------------
                                                                                     1997              1998
                                                                          ---------------   ---------------
<S>                                                                       <C>               <C>
Deferred Assets:
   Federal and state net operating loss carryforwards .................    $  44,334,000     $  54,779,000
   Research and experimentation tax credit carryforwards ..............        2,735,000         3,235,000
   Plant and equipment, principally due to differences in depreciation           753,000           772,000
   Patents, principally due to differences in amortization ............           68,000            62,000
   Accrued expenses ...................................................          385,000           665,000
                                                                           -------------     -------------
   Total deferred tax assets ..........................................       48,275,000        59,513,000
   Valuation allowance ................................................      (48,275,000)      (59,513,000)
                                                                           -------------     -------------
   Net deferred tax assets ............................................    $          --     $          --
                                                                           =============     =============

</TABLE>

A  valuation  allowance  is  provided  when it is more likely than not that some
portion  or all of the deferred tax assets will not be realized. At December 31,
1998,  the  Company  had  net  operating  loss  carryforwards  of  approximately
$135,000,000  that  will expire in the years 2001 through 2012. The Company also
has   research   and   experimentation  credit  carryforwards  of  approximately
$3,235,000   that   expire   in   the   years   2001   through   2018.  Ultimate
utilization/availability  of  such  net  operating  losses  and  credits  may be
curtailed if a significant change in ownership occurs.


(10) DISCONTINUED OPERATION

On  January 9, 1998, the Company concluded an agreement with Cambrex Corporation
for  Cambrex to acquire Celgene's chiral intermediate business for approximately
$15  million.  The  Company  received  $7.5  million  upon  the  closing  of the
transaction,  and  will  receive  future  royalties  with  a  present  value not
exceeding  $7.5  million,  with  certain  minimum  royalty payments in the third
through  sixth  year  following  the closing of the transaction. Included in the
transaction  are the rights to Celgene's enzymatic technology for the production
of  chirally  pure  intermediates for the pharmaceutical industry, including the
current  pipeline  of  third-party  products  and  the  equipment  and personnel
associated with the business.

Revenues  relative  to  the chiral intermediate business were approximately $1.4
million  and  $2.1  million  for  1996  and  1997, respectively. Direct expenses
related  to  the chiral intermediate business were $2.2 million and $2.5 million
for 1996 and 1997, respectively.


                                      F-17
<PAGE>

                              CELGENE CORPORATION
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                 DECEMBER 31, 1996, 1997 AND 1998 (CONTINUED )

(11) MARKETABLE SECURITIES AVAILABLE FOR SALE


Marketable  securities  available  for  sale  at  December 31, 1998 include debt
securities  with  maturities ranging from March 1999 to October 2002. Marketable
securities  at  December  31,  1998  include Corporate Bonds ($1,006,890) and US
Government  and agency obligations ($1,050,000). The carrying value equaled fair
market value. There were no marketable securities at December 31, 1997.


(12) COMMITMENTS AND CONTINGENCIES


(a) Leases


Celgene  leases  its  main  laboratory and office facilities in Warren Township,
New  Jersey.  The  current  lease  term for the main laboratory and office space
expires  in  2002  and  has  one  five-year  renewal option. Annual payments are
$330,000.  The  lease  provides that at the end of each five-year term, the rent
will  be  increased based upon the change in the consumer price index, but in no
case  shall  the  increase  be greater than 20%. Celgene is also required to pay
additional  amounts  for  real  estate  taxes, utilities, and maintenance. Total
rental  expense  amounted  to  $453,000, $477,000 and $486,000 in 1996, 1997 and
1998,  respectively.  Celgene  has subleased 12,500 square feet of this facility
to  Cambrex  Corporation  for  up  to  three  years  for the chiral intermediate
business which Cambrex purchased on January 9, 1998.


In  January  1997,  the  Company  entered into a sub-lease agreement to lease an
additional  18,000  square feet of laboratory and office space in Annandale, New
Jersey.  The  sub-lease  agreement  is for a two year term, expiring in February
1999. Annual payments are $227,500.


In  July  1997,  the  Company entered into an equipment leasing agreement. Under
the  agreement,  the Company can lease up to $1,000,000 of equipment for a three
year  term  after  which  the  Company  can purchase the equipment for a nominal
value.  Through December 31, 1998, the Company has leased $675,000 of laboratory
equipment  under  this  agreement.  Under  this  capital  lease,  the Company is
committed to 36 monthly payments of approximately $21,000.


(b) Employment Agreements


Celgene  has  employment  agreements  with  certain  officers and employees. The
related  outstanding  commitments over the next two years are approximately $1.6
million,  of which $1.0 million is due in 1999. Employment contracts provide for
an  increase  in  compensation  reflecting  annual  reviews  and  related salary
adjustments.


(c) Contracts


Pursuant  to  the  terms  of  a  research  and  development  agreement  with The
Rockefeller  University,  the  Company  has  the world-wide exclusive license to
manufacture  and market any drugs, including THALOMID, which may result from the
research  performed at The Rockefeller University and funded by the Company. The
Rockefeller  University  is  entitled  to  receive royalties based on commercial
sales  of  any  such drugs for certain indications for ten years after the first
sale.  Under  terms  of the current research agreement extension, the Company is
committed to pay The Rockefeller University $504,000 annually for research.


In   December   1995,   the   Company   entered  into  an  agreement  with  Penn
Pharmaceutical,  Ltd.  of Great Britain ("Penn") for the production of THALOMID.
Annual   facility  payments  are  approximately  $480,000,  which  commenced  in
December  1996.  Penn  will  manufacture THALOMID and sell it exclusively to the
Company.  The  agreement  has  been  renewed  for 1999, for facility payments of
approximately $480,000.


In  October  1997, the Company entered into a contract with Boston University to
manage  the surveillance registry which is intended to monitor compliance to the
requirements  of  the  Company's  S.T.E.P.S.  program  (prescription  safety and
education  program) for all THALOMID patients. The contract has been renewed for
1999.  Under  the  terms  of  the  agreement quarterly payments of approximately
$300,000  are  required.  The  contract  is  renewable  for  one-year terms upon
agreement of both parties.


                                      F-18
<PAGE>

                              CELGENE CORPORATION
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                  DECEMBER 31, 1996, 1997 AND 1998 (CONTINUED)

(12) COMMITMENTS AND CONTINGENCIES (CONTINUED)

In  December  1997,  the  Company  entered  into  a  research agreement with the
University  of  Glasgow  for  clinical  testing  and  evaluation  of  certain of
Celgene's  patented  compounds.  Under terms of the agreement, Celgene would pay
the  University  approximately  $200,000 in two annual installments. The term of
the agreement is for two years.

In  June  1998,  the  Company  entered into a research agreement with a contract
research    organization    to   manage   the   pivotal   clinical   trial   for
d-methylphenidate  encompassing  four  separate  protocols. The agreement is for
approximately  two years and is estimated at approximately $3.0 million over the
life of the agreement.

In  December  1998, the Company entered into an exclusive license agreement with
EntreMed,  Inc.  whereby EntreMed granted to Celgene an exclusive license to its
patent  and  technology  rights for thalidomide. In return EntreMed will receive
royalties on all sales of THALOMID.

In  December  1998, the Company entered into a one year clinical trial agreement
with  the  University of Arkansas for Medical Science to collaborate on clinical
trials  for  multiple  myeloma under four separate protocols. The commitment for
1999 is $200,000.

The  Company  has  various  other  research  and  consulting agreements totaling
approximately $336,000 for 1999.

(d) Contingencies

The  Company  believes  it maintains insurance coverage adequate for its current
needs.

The  Company's  operations  are  subject  to  environmental laws and regulations
which  impose  limitations on the discharge of pollutants into the air and water
and  establish  standards  for  the treatment, storage and disposal of solid and
hazardous  wastes.  The Company reviews the effects of such laws and regulations
on  its  operation  and  modifies  its  operations  as  appropriate. The Company
believes  that it is in substantial compliance with all applicable environmental
laws and regulations.

(e) Concentration of Market Risk

Sales  to  one  chain pharmacy and three wholesalers accounted for 27%, 18%, 15%
and  14% of sales, respectively, in 1998. The direct sales to the chain pharmacy
were  for  the  initial  stocking  order.  All  future  sales  will  be  through
wholesalers.

One  customer  accounted  for  100% of the research contract revenue in 1996 and
1997.  Three  customers accounted for 37%, 28% and 24% of 1998 research contract
revenue.


(13) SUBSEQUENT EVENT

On  January  20, 1999, the Company issued a $15.0 million convertible note to an
institutional  investor.  The  note has a five year term and a coupon rate of 9%
with  interest  payable  on  a semi-annual basis. The debt contains a conversion
feature  that  allows  the note holder to convert the debt into shares of common
stock  after  one  year  at a conversion price of $18 per share. The Company can
redeem  the note after three years (two years if the stock trades at 225% of the
conversion  price  for  a period of 20 consecutive trading days), at 103% of the
principal  amount.  Net  proceeds  after  issuance  at  a  discount  were $14.25
million.

                                      F-19
<PAGE>

                              CELGENE CORPORATION
                      CONDENSED CONSOLIDATED BALANCE SHEET
                                  (UNAUDITED)




<TABLE>
<CAPTION>
                                                                            ----------
                                                                                SEPTEMBER 30,
                                                                                         1999
                                                                            -----------------
<S>                                                                         <C>
ASSETS
Current assets:
 Cash and cash equivalents ................................................  $   14,324,499
 Marketable securities available for sale .................................       4,299,974
 Accounts receivable, net of allowance of $117,512 at September 30, 1999...       2,941,555
 Inventory ................................................................       2,072,272
 Other current assets .....................................................         678,527
                                                                             --------------
   Total current assets ...................................................      24,316,827
Plant and equipment, net ..................................................       2,083,212
Other assets ..............................................................         688,732
                                                                             --------------
   Total assets ...........................................................  $   27,088,771
                                                                             ==============
LIABILITIES AND STOCKHOLDERS' (DEFICIT)
Current liabilities:
 Accounts payable .........................................................  $    3,041,185
 Accrued expenses .........................................................       3,826,091
 Capitalized lease obligation .............................................         214,544
                                                                             --------------
   Total current liabilities ..............................................       7,081,820
Capitalized lease obligation-net of current portion .......................          44,607
Long term convertible notes ...............................................      38,458,336
                                                                             --------------
   Total liabilities ......................................................      45,584,763
                                                                             --------------
Stockholders' equity (deficit):
 Common stock, $.01 par value per share
   30,000,000 shares authorized at September 30, 1999
   issued and outstanding 17,151,595 shares at September 30, 1999 .........         171,516
 Additional paid-in capital ...............................................     144,944,797
 Accumulated deficit ......................................................    (163,548,803)
 Accumulated other comprehensive loss .....................................         (63,502)
                                                                             --------------
   Total stockholders' deficit ............................................     (18,495,992)
                                                                             --------------
 Total liabilities and stockholders' deficit ..............................  $   27,088,771
                                                                             ==============

</TABLE>

See accompanying notes to condensed consolidated financial statements.

                                      F-20
<PAGE>

                              CELGENE CORPORATION
                CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                                  (UNAUDITED)




<TABLE>
<CAPTION>
                                                                                    -------------------
                                                                                     NINE MONTHS ENDED
                                                                                       SEPTEMBER 30,
                                                                            ------------------------------------
                                                                                        1998                1999
                                                                            ----------------   -----------------
<S>                                                                         <C>                <C>
Revenues:
 Product sales ..........................................................    $   1,030,838       $  15,063,644
 Research contracts .....................................................          105,000           1,732,500
                                                                             -------------       -------------
   Total revenues .......................................................        1,135,838          16,796,144
Expenses:
 Cost of goods sold .....................................................           59,270           2,076,457
 Research and development ...............................................       13,968,657          14,366,132
 Selling, general and administrative ....................................       11,207,326          17,846,527
                                                                             -------------       -------------
   Total expenses .......................................................       25,235,253          34,289,116
Operating loss ..........................................................      (24,099,415)        (17,492,972)
Other income and expense:
 Interest income ........................................................          497,100             511,659
 Interest expense .......................................................           45,192           1,954,420
                                                                             -------------       -------------
Loss from continuing operations .........................................      (23,647,507)        (18,935,733)
Discontinued operations: (Note 7)
 Loss from operations ...................................................          (59,837)                 --
 Gain on sale of chiral assets ..........................................        7,014,830                  --
                                                                             -------------       -------------
Net loss ................................................................      (16,692,514)        (18,935,733)
Accretion of premium payable on preferred stock .........................           24,648                  --
                                                                             -------------       -------------
Net loss applicable to common stockholders ..............................    $ (16,717,162)      $ (18,935,733)
                                                                             =============       =============
Per share basic and diluted:
 Loss from continuing operations ........................................    $       (1.47)      $       (1.12)
 Discontinued operations:
   Loss from operations .................................................               --                  --
   Gain on sale of chiral assets ........................................             0.44                  --
                                                                             -------------       -------------
 Net loss applicable to common stockholders per share of common stock ...    $       (1.04)      $       (1.12)
                                                                             =============       =============
 Weighted average number of shares of common stock outstanding ..........       16,062,000          16,903,000
                                                                             =============       =============

</TABLE>

See accompanying notes to condensed consolidated financial statements.

                                      F-21
<PAGE>

                              CELGENE CORPORATION
                CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                                  (UNAUDITED)




<TABLE>
<CAPTION>
                                                                                 -------------------
                                                                                 THREE MONTHS ENDED
                                                                                    SEPTEMBER 30,
                                                                          ---------------------------------
                                                                                     1998              1999
                                                                          ---------------   ---------------
<S>                                                                       <C>               <C>
Revenues:
 Product sales ........................................................    $  1,030,838      $  6,315,319
 Research contracts ...................................................          25,000           425,000
                                                                           ------------      ------------
   Total revenues .....................................................       1,055,838         6,740,319
Expenses:
 Cost of goods sold ...................................................          59,270           701,816
 Research and development .............................................       5,238,106         4,933,317
 Selling, general and administrative ..................................       3,876,150         6,618,373
                                                                           ------------      ------------
   Total expenses .....................................................       9,173,526        12,253,506


Operating loss ........................................................      (8,117,688)       (5,513,187)
Other income and expense:
 Interest income ......................................................         136,262           256,215
 Interest expense .....................................................          39,086           861,397
                                                                           ------------      ------------
Net loss ..............................................................    $ (8,020,512)     $ (6,118,369)
                                                                           ============      ============
Per share basic and diluted:
 Net loss .............................................................    $      (0.49)     $      (0.36)
                                                                           ============      ============
Weighted average number of shares of common stock outstanding .........      16,399,000        17,028,000
                                                                           ============      ============
</TABLE>

See accompanying notes to condensed consolidated financial statements.

                                      F-22
<PAGE>

                              CELGENE CORPORATION
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                                  (UNAUDITED)



<TABLE>
<CAPTION>
                                                                                                --------------------
                                                                                           NINE MONTHS ENDED SEPTEMBER 30,
                                                                                        -------------------------------------
                                                                                                     1998                1999
                                                                                        -----------------   -----------------
<S>                                                                                     <C>                 <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
Loss from continuing operations .....................................................     $ (23,647,507)      $ (18,935,733)
Adjustments to reconcile loss from continuing operations to
 net cash used in operating activities:
 Depreciation .......................................................................           575,575             585,497
 Issuance of stock for employee benefits ............................................           463,606             799,004
 Provision for doubtful accounts ....................................................                --              74,126
 Amortization of debt issuance costs ................................................                --             187,500
 Amortization of discount on convertible note .......................................                --             109,377
Change in current assets & liabilities:
 Increase in inventory ..............................................................          (317,437)           (500,864)
 Increase (Decrease) in accounts payable and accrued expenses .......................        (1,984,036)           (822,440)
 (Increase) Decrease in accounts receivable .........................................           388,063            (353,292)
 (Increase) Decrease in other assets ................................................           129,648            (496,534)
                                                                                          -------------       -------------
Net cash used in continuing operations ..............................................       (20,424,016)        (19,353,359)
Net cash used in discontinued operations ............................................           (59,837)                 --
                                                                                          -------------       -------------
Net cash used in operating activities ...............................................       (20,483,853)        (19,353,359)
                                                                                          -------------       -------------
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures ................................................................          (645,104)           (406,579)
Proceeds from sales and maturities of marketable
 securities available for sale ......................................................         7,086,154           2,495,992
Purchases of marketable securities available for sale ...............................       (10,116,494)         (4,802,578)
Proceeds from sale of chiral assets .................................................         7,500,000                  --
                                                                                          -------------       -------------
Net cash provided by (used in) investing activities .................................         3,824,556          (2,713,165)
                                                                                          -------------       -------------
CASH FLOWS FROM FINANCING ACTIVITIES:
Costs related to secondary public offering ..........................................           (73,136)                 --
Proceeds from the sale of stock .....................................................         2,500,000                  --
Proceeds from exercise of common stock options and warrants .........................         1,673,740           4,235,869
Capital lease buyout ................................................................          (329,614)           (161,799)
Capital lease funding ...............................................................           260,195                  --
Debt issuance costs .................................................................          (437,500)           (750,000)
Proceeds from convertible notes .....................................................         8,750,000          30,000,000
                                                                                          -------------       -------------
Net cash provided by (used in) financing activities .................................        12,343,685          33,324,070
                                                                                          -------------       -------------
Net (decrease) increase in cash and cash equivalents ................................        (4,315,612)         11,257,546
Cash and cash equivalents at beginning of period ....................................        13,583,445           3,066,953
                                                                                          -------------       -------------
Cash and cash equivalents at end of period ..........................................     $   9,267,833       $  14,324,499
                                                                                          -------------       -------------
NON-CASH INVESTING ACTIVITY:
Change in net unrealized loss on marketable securities available for sale ...........     $          --       $     (63,502)
                                                                                          =============       =============
NON-CASH FINANCING ACTIVITIES:
Issuance of common stock upon the conversion of Series A convertible preferred stock
 and accretion thereon, net .........................................................     $   4,054,103       $          --
                                                                                          =============       =============
Accretion of premium payable on preferred stock and warrants ........................     $      24,648       $          --
                                                                                          =============       =============
INTEREST PAID .......................................................................     $      11,468       $   1,080,693
                                                                                          =============       =============
</TABLE>

See accompanying notes to condensed consolidated financial statements.

                                      F-23
<PAGE>

                              CELGENE CORPORATION
        NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                              SEPTEMBER 30, 1999

1. Basis of Presentation


The  unaudited  condensed  consolidated  financial statements have been prepared
from  the books and records of Celgene Corporation (the "Company") in accordance
with  generally accepted accounting principles for interim financial information
pursuant  to  Rule 10-01 of Regulation S-X. Accordingly, they do not include all
of  the  information  and  footnotes  required  by generally accepted accounting
principles for complete financial statements.


In  the  opinion  of  management,  all  adjustments  (consisting  only of normal
recurring  accruals)  considered  necessary  for  a  fair presentation have been
included.  Interim  results  may  not  be  indicative of the results that may be
expected for the year.


The  interim  condensed  consolidated  financial  statements  should  be read in
conjunction  with  the  consolidated  financial  statements  and  notes  thereto
included in the Company's latest annual report on Form 10-K.


2. Series A Convertible A Preferred Stock


The  Series A Convertible Preferred Stock ("Preferred Stock"), plus accretion at
a  rate  of  4.9%  per year, was convertible into common stock of the Company at
the  option  of  the  holders  thereof at a conversion price per share of Common
Stock  equal,  generally, to the lesser of (i) $18.81 or (ii) 90% of the average
closing  price  per  share  of  the  Common  Stock  for  the  seven trading days
immediately prior to the date of conversion.


As  of  February  23, 1998, all 503 shares of the Series A Preferred Stock, with
their  respective  accretion,  had  been  converted  or  redeemed into 3,342,202
shares  of  common  stock.  Through  February  23,  1998 the Company had accrued
$1,420,770 representing accretion of the premium on the Preferred Stock.


3. Warrants to Acquire Common Stock


Under  the  terms  of  a  private  placement  of  Series  B Preferred Stock with
Chancellor  LGT  Asset  Management,  Inc. ("Chancellor") entered into on June 9,
1997,  upon the request of the purchasers of the Series B Preferred, the Company
is  obligated  to  issue warrants to Chancellor to acquire a number of shares of
Common  Stock  equal  to (i) 1,500,000 divided by the Conversion Price ($6.50 at
September  30,  1999)  in  effect  on  the issuance date (230,769 warrants as of
September  30,  1999)  plus (ii) 37.5% of the conversion shares issuable on such
issuance  date  upon conversion of all shares of Series B Preferred Stock issued
through  the issuance date (288,461 warrants as of September 30, 1999). All such
warrants  will  have a term of four years from the issuance date and an exercise
price  equal  to 115% of the Conversion Price in effect on the issuance date. As
of September 30, 1999, no warrants have been issued.


4. Stock Based Compensation


On  June  22,  1999,  an amendment to the 1995 Non-Employee Directors' Incentive
Plan  was  approved  by  the Company's stockholders. The amendment increased the
number  of  shares  that  may  be  issued  upon exercise of options granted from
350,000   shares   to   600,000  shares.  The  amendment  also  provides  for  a
discretionary  grant  upon  the  date  of  each  annual meeting of an additional
option  to  purchase up to 5,000 shares to a non-employee director who serves as
a  member  (but not a chairman) of a committee of the Board of Directors, and up
to  10,000  shares  to  a  non-employee director who serves as the chairman of a
committee of the Board of Directors.


5. Convertible Debt


On  September  16,  1998,  the  Company  issued  to an institutional investor an
$8,750,000  convertible  note due September 16, 2003. The proceeds were net of a
5%  fee  or  $437,500,  the  cost  of  which will be amortized over a three-year
period.  The  note  bears  interest  at  9.25% which is payable semi-annually on
March  16  and September 16 each year. The Company may, at its election, pay all
or  a  portion  of  the interest on this security in shares of Common Stock. The
note  is convertible into 795,463 shares of Common Stock at a price equal to $11
per  share which was 125% of the fair market value of the Company's Common Stock
at  the  date of issuance. The Company can, at its election, redeem the Security
in  three  years  (two years under certain conditions), at 103% of the principal
amount.


                                      F-24
<PAGE>

                              CELGENE CORPORATION
        NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                        SEPTEMBER 30, 1999 (CONTINUED )

On  January  20,  1999,  the  Company  issued  to  an  institutional  investor a
convertible  note  in  the  amount of $15,000,000. The note has a five-year term
and  a  coupon rate of 9% with interest payable on a semi-annual basis. The note
contains  a  conversion  feature that allows the note holder to convert the note
into  shares  of  common  stock after one year at $18 per share. The Company can
redeem  the  note  after  three years at 103% of the principal amount (two years
under  certain  conditions).  This  note  was  subject  to  an  issuance cost of
$750,000 or 5%, which is being amortized over three years.

On  July  6, 1999, the Company issued to an institutional investor a convertible
note  in  the  amount of $15,000,000. The note has a five-year term and a coupon
rate  of  9%  with  interest payable on a semi-annual basis. The note contains a
conversion  feature  that allows the note holder to convert the note into shares
of  common  stock  after  one  year at $19 per share. The Company can redeem the
note  after three years at 103% of the principal amount (two years under certain
conditions). There was no fee or discount associated with this note.

6. Marketable Securities Available for Sale

Marketable  securities  available  for  sale  at September 30, 1999 include debt
securities  with  maturities ranging from January 2000 to August 2004. A summary
of marketable securities at September 30, 1999 is as follows:




<TABLE>
<CAPTION>
                                               -----------------------------
                                                        GROSS        GROSS     ESTIMATED
                                                   UNREALIZED   UNREALIZED          FAIR
                                            COST         GAIN         LOSS         VALUE
                                   ------------- ------------ ------------ -------------
<S>                                <C>           <C>          <C>          <C>
Government Bonds & Notes ......... $2,313,476            --   $(15,557)    $2,297,919
Government Agencies ..............  2,050,000            --    (47,945)     2,002,055
                                   ----------            --   --------     ----------
Total ............................ $4,363,476            --   $(63,502)    $4,299,974
                                   ==========            ==   ========     ==========
</TABLE>

7. Discontinued Operations

On  January  9,  1998,  the  Company  sold  its  chiral intermediate business to
Cambrex  Corporation for approximately $15.0 million. The terms of the agreement
provided  for  the  sale of chiral assets of approximately $485,000 for proceeds
of  $7.5 million on the contract date plus future royalties with a present value
not  exceeding  $7.5 million, with certain minimum royalty payments in the third
through  sixth  year  following  the closing of the transaction. Included in the
transaction  are  the  rights  to  the  Company's  enzymatic  technology for the
production  of  chirally  pure  intermediate  for  the  pharmaceutical industry,
including  the  current  pipeline  of third party products and the equipment and
personnel associated with the business.

8. Comprehensive Income and Recently Issued Accounting Pronouncement

Comprehensive  income  includes  net income and other comprehensive income which
refers  to  those  revenues,  expenses, gains and losses which are excluded from
net  income.  Other comprehensive income includes unrealized gains and losses on
marketable  securities classified as available-for-sale, which prior to adoption
were reported separately in shareholders' equity.



<TABLE>
<CAPTION>
                                          --------------------
                                     NINE MONTHS ENDED SEPTEMBER 30,
                                   -----------------------------------
                                                1998              1999
                                   ----------------- -----------------
<S>                                <C>               <C>
Net Loss ......................... $(16,692,514)     $(18,935,733)
Other Comprehensive Loss .........            --          (63,502)
                                    ------------     ------------
Total Comprehensive Loss ......... $(16,692,514)     $(18,999,235)
                                   ============      ============
</TABLE>


<TABLE>
<CAPTION>
                                         --------------------
                                   THREE MONTHS ENDED SEPTEMBER 30,
                                   ---------------------------------
                                               1998             1999
                                   ---------------- ----------------
<S>                                <C>              <C>
Net Loss ......................... $(8,020,512)     $(6,118,369)
                                   -----------      -----------
Other Comprehensive Loss .........           --         (12,072)
                                    -----------     -----------
Total Comprehensive Loss ......... $(8,020,512)     $(6,130,441)
                                   ===========      ===========
</TABLE>

                                      F-25
<PAGE>

                              CELGENE CORPORATION
        NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                        SEPTEMBER 30, 1999 (CONTINUED )



In  June  1998, SFAS No. 133, "Accounting for Derivative Instruments and Hedging
Activities",  was  issued and is effective for all fiscal quarters of all fiscal
years   beginning  after  June  15,  2000.  SFAS  No.  133  requires  derivative
instruments  to  be recognized as Assets and Liabilities and be recorded at Fair
Value.  The  Company  is  currently not party to any Derivative Instruments. Any
future  transactions involving Derivative Instruments will be evaluated based on
SFAS No. 133.

9. Subsequent Events

In  November, 1999, we signed an amendment to The Rockefeller University License
Agreement  pursuant  to  which  we  agreed  to substitute a lump sum payment and
issue  stock  options to The Rockefeller University and the inventors in lieu of
the royalties previously payable under the license.

In  December, 1999, we entered into a lease with our current landlord to rent an
additional  29,000  square  feet  of office and laboratory space adjacent to our
current  leased  space. The lease has a ten-year term with two five-year renewal
options. The annual commitment is approximately $260,000.

                                      F-26
<PAGE>



[GRAPHIC OMITTED]





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