IMCLONE SYSTEMS INC/DE
10-Q, 1999-08-16
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                              Washington, DC 20549

                                    FORM 10-Q

      [X]     QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
              OF THE SECURITIES EXCHANGE ACT OF 1934

              For the quarterly period ended  June 30, 1999

      [ ]     TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
              OF THE SECURITIES EXCHANGE ACT OF 1934

              For the transition period from  ___________  to  ___________

Commission file number  0-19612

                          IMCLONE SYSTEMS INCORPORATED
              ----------------------------------------------------
             (Exact name of registrant as specified in its charter)

             DELAWARE                                            04-2834797
- --------------------------------                             ------------------
 (State or other jurisdiction of                               (IRS Employer
  incorporation or organization)                             Identification No.)

    180 VARICK STREET, NEW YORK, NY                                 10014
- ---------------------------------------                            --------
(Address of principal executive offices)                          (Zip Code)

                                 (212) 645-1405
               --------------------------------------------------
               Registrant's telephone number, including area code

                                 Not Applicable
               --------------------------------------------------
               Former name, former address and former fiscal year,
                          if changed since last report

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days.

                        Yes  _X_    No ___

Applicable only to corporate issuers:

Indicate the number of shares outstanding of each of the registrant's classes of
common stock, as of the latest practicable date.

                  Class                     Outstanding as of August 13, 1999
      -----------------------------         ---------------------------------
      Common Stock, par value $.001                 25,540,495  Shares

<PAGE>

                          IMCLONE SYSTEMS INCORPORATED

                                      INDEX
                                      -----

                                                                        Page No.
                                                                        --------

PART I - FINANCIAL INFORMATION

   Item 1.    Financial Statements

              Consolidated Balance Sheets - June 30, 1999 (unaudited)
              and December 31, 1998                                            1

              Unaudited Consolidated Statements of Operations - Three
              and six months ended June 30, 1999 and 1998                      2

              Unaudited Consolidated Statements of Cash Flows - Six
              months ended June 30, 1999 and 1998                              3

              Notes to Consolidated Financial Statements                       4

   Item 2.    Management's Discussion and Analysis of
              Financial Condition and Results of Operations                    6

   Item 3.    Quantitative and Qualitative Disclosures About
              Market Risk                                                     13


PART II - OTHER INFORMATION


   Item 4.    Submission of Matters to a Vote of Security Holders             14

   Item 6.    Exhibits and Reports on Form 8-K                                15

<PAGE>

Part 1 - FINANCIAL INFORMATION
Item 1 - Financial Statements

                          IMCLONE SYSTEMS INCORPORATED

                           Consolidated Balance Sheets
                 (in thousands, except per share and share data)

                                                         June 30,   December 31,
                            Assets                         1999        1998
                                                        ----------  ------------
                                                        (unaudited)

Current assets:
     Cash and cash equivalents ......................... $   2,672    $   3,888
     Securities available for sale .....................    38,006       42,851
     Prepaid expenses ..................................       434          470
     Other current assets ..............................     1,378        1,196
                                                         ---------    ---------
                Total current assets ...................    42,490       48,405
                                                         ---------    ---------
Property and equipment:
     Land ..............................................       340          340
     Building and building improvements ................    10,690       10,519
     Leasehold improvements ............................     4,878        4,846
     Machinery and equipment ...........................     8,427        7,834
     Furniture and fixtures ............................       641          640
     Construction in progress ..........................     1,860          115
                                                         ---------    ---------
                Total cost .............................    26,836       24,294

       Less accumulated depreciation
          and amortization .............................   (13,742)     (12,877)
                                                         ---------    ---------
                Property and equipment, net ............    13,094       11,417
                                                         ---------    ---------

Patent costs, net ......................................       892          860
Deferred financing costs, net ..........................        41           46
Other assets ...........................................     1,581        1,524
                                                         ---------    ---------
                                                         $  58,098    $  62,252
                                                         =========    =========
               Liabilities and Stockholders' Equity

Current liabilities:
    Accounts payable ................................... $     944    $   1,109
    Accrued expenses and other .........................     3,568        4,847
    Interest payable ...................................        43           45
    Deferred revenue ...................................      --             75
    Fee potentially refundable from corporate partner ..    12,000        4,000
    Current portion of long-term liabilities ...........       919          744
    Preferred stock dividends payable ..................     3,702        2,512
                                                         ---------    ---------
                Total current liabilities ..............    21,176       13,332
                                                         ---------    ---------

Long-term debt .........................................     2,200        2,200
Other long-term liabilities, less current portion ......     1,586        1,546
                                                         ---------    ---------
                Total liabilities ......................    24,962       17,078
                                                         ---------    ---------

Commitments and contingencies

Stockholders' equity :
    Preferred stock, $1.00 par value;  authorized
         4,000,000 shares;  issued and outstanding
         Series A Convertible: 400,000 at June 30,
         1999 and December 31, 1998 (preference
         in liquidation $43,702 and $42,512,
         respectively) .................................       400          400
    Common stock, $.001 par value; authorized
         60,000,000 shares; issued 25,397,474 and
         24,567,312 at June 30, 1999 and December 31,
         1998, respectively; outstanding 25,346,657,
         and 24,516,495 at June 30, 1999 and December
         31, 1998, respectively ........................        25           25
    Additional paid-in capital .........................   188,118      184,853
    Accumulated deficit ................................  (155,055)    (138,846)
    Treasury stock, at cost; 50,817 shares
         at June 30, 1999 and
         December 31, 1998 .............................      (492)        (492)
    Note receivable - officer and stockholder ..........      (137)        (142)
    Accumulated other comprehensive income (loss):
         Unrealized gain (loss) on securities
              available for sale, net ..................       277         (624)
                                                         ---------    ---------
                 Total stockholders' equity ............    33,136       45,174
                                                         ---------    ---------
                                                         $  58,098    $  62,252
                                                         =========    =========

          See accompanying notes to consolidated financial statements.


                                     Page 1

<PAGE>

                          IMCLONE SYSTEMS INCORPORATED

                      Consolidated Statements of Operations
                      (in thousands, except per share data)
                                   (unaudited)

<TABLE>
<CAPTION>
                                                     Three Months Ended       Six Months Ended
                                                          June 30,                June 30,
                                                   ---------------------   ---------------------
                                                      1999       1998        1999        1998
                                                   ---------   ---------   ---------   ---------
<S>                                                <C>         <C>         <C>         <C>
Revenues:
     Product development milestone revenues ....   $   --      $   --      $   --      $  1,000
     Research and development funding from third
          parties and other ....................        254         765         883       1,615
                                                   --------    --------    --------    --------
                   Total revenues ..............        254         765         883       2,615
                                                   --------    --------    --------    --------
Operating expenses:
     Research and development ..................      7,151       4,675      13,505       8,846
     General and administrative ................      1,675       1,546       3,677       2,959
                                                   --------    --------    --------    --------
                  Total operating expenses .....      8,826       6,221      17,182      11,805
                                                   --------    --------    --------    --------

Operating loss .................................     (8,572)     (5,456)    (16,299)     (9,190)
                                                   --------    --------    --------    --------
Other:
     Interest income ...........................       (564)       (777)     (1,168)     (1,607)
     Interest expense ..........................        123         110         246         200
     Loss (gain) on securities available
        for sale ...............................       --            (1)        832          (2)
                                                   --------    --------    --------    --------
               Net interest  and other income ..       (441)       (668)        (90)     (1,409)
                                                   --------    --------    --------    --------
Net loss .......................................     (8,131)     (4,788)    (16,209)     (7,781)

Preferred  dividends (including assumed
     incremental  yield  attributable  to
     beneficial  conversion  feature of $336
     and $317 for the three months ended
     June 30, 1999 and 1998,  respectively
     and $672 and $635 for the six months
     ended June 30, 1999 and 1998,
     respectively) .............................        934         967       1,862       1,825
                                                   --------    --------    --------    --------
Net loss to common stockholders ................   $ (9,065)   $ (5,755)   $(18,071)   $ (9,606)
                                                   ========    ========    ========    ========
Basic and diluted net loss per common share ....   $  (0.36)   $  (0.24)   $  (0.73)   $  (0.40)
                                                   ========    ========    ========    ========
Weighted average shares outstanding ............     24,986      24,273      24,718      24,251
                                                   ========    ========    ========    ========
</TABLE>

          See accompanying notes to consolidated financial statements.


                                     Page 2
<PAGE>

                          IMCLONE SYSTEMS INCORPORATED

                      Consolidated Statements of Cash Flows
                                 (in thousands)
                                   (unaudited)

                                                            Six Months Ended
                                                                 June 30,
                                                           --------------------
                                                             1999        1998
                                                           ---------   --------
Cash flows from operating activities:
 Net loss ................................................ $(16,209)   $ (7,781)
 Adjustments to reconcile net loss to net
        cash used in operating activities:
    Depreciation and amortization ........................      925         883
    Expense associated with issuance
        of options and warrants ..........................    1,064         310
    Loss (gain) on securities available for sale .........      832          (2)
    Changes in:
       Prepaid expenses ..................................      138          20
       Other current assets ..............................     (284)        (49)
       Other assets ......................................     (135)        (35)
       Interest payable ..................................       (2)        (25)
       Accounts payable ..................................     (165)       (151)
       Accrued expenses and other ........................   (1,279)       (744)
       Deferred revenue ..................................      (75)         75
       Fee potentially refundable from corporate partner .    8,000        --
                                                           --------    --------
              Net cash used in operating activities ......   (7,190)     (7,499)
                                                           --------    --------

Cash flows from investing activities:
    Acquisitions of property and equipment ...............   (2,010)       (570)
    Purchases of securities available for sale ...........  (18,508)    (28,760)
    Sales and maturities of securities available for sale    23,500      37,997
    Additions to patents .................................      (87)        (81)
                                                           --------    --------
              Net cash provided by investing activities  .    2,895       8,586
                                                           --------    --------

Cash flows from financing activities:
    Proceeds from exercise of stock options and warrants .    3,335         150
    Proceeds from issuance of common stock under the
        employee stock purchase plan .....................       50        --
    Proceeds from equipment and building improvement
        financings .......................................       94         593
    Payments of other liabilities ........................     (411)       (514)
    Interest received on note receivable - officer
        and stockholder ..................................       11        --
                                                           --------    --------
              Net cash provided by financing activities ..    3,079         229
                                                           --------    --------
Net (decrease) increase in cash and cash equivalents .....   (1,216)      1,316

Cash and cash equivalents at beginning of period .........    3,888       2,558
                                                           --------    --------
Cash and cash equivalents at end of period ............... $  2,672    $  3,874
                                                           ========    ========

          See accompanying notes to consolidated financial statements.


                                     Page 3
<PAGE>

                          IMCLONE SYSTEMS INCORPORATED
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                   (unaudited)

(1)  Basis of Presentation

The consolidated financial statements of ImClone Systems Incorporated ("ImClone"
or the  "Company")  as of June 30,  1999 and for the three and six months  ended
June 30,  1999 and 1998 are  unaudited.  In the  opinion  of  management,  these
unaudited  financial  statements  include all  adjustments,  consisting  only of
normal recurring adjustments, necessary for a fair presentation. These financial
statements should be read in conjunction with the audited  financial  statements
and notes thereto  included in the Company's  Annual Report on Form 10-K for the
year  ended  December  31,  1998,  as filed  with the  Securities  and  Exchange
Commission.

Results for the interim  periods are not  necessarily  indicative of results for
the full years.

(2) Commitments

The  Company  signed a  definitive  agreement  in  April  1999  with  Boehringer
Ingelheim Pharmaceuticals KG ("BI Pharmaceuticals") for the further development,
production  scale-up and manufacture of the Company's lead  therapeutic  product
candidate,  C225, for use in human clinical  trials.  Services  pursuant to this
agreement  commenced in April 1998  pursuant to an agreement in  principle.  The
Company estimates that the total cost under the agreement, including the cost of
additional  amounts of material  the  Company has the right to request,  will be
DM12,100,000  or  $6,392,000.  As of June 30,  1999,  the Company  has  incurred
approximately  DM3,940,000,  of which  DM3,130,000  has been paid,  for services
provided under this agreement.

(3) Related Party Transactions

In January 1998, the Company  accepted a promissory note totaling  approximately
$131,000 from its President and CEO in connection with the exercise of a warrant
to purchase  87,305 shares of the Company's  common stock,  $.001 par value (the
"Common  Stock").  The note is due no later than two years from  issuance and is
full recourse. Interest was paid on the first anniversary date of the promissory
note at an annual  rate of 8.5% and is  payable on the  stated  maturity  or any
accelerated  maturity.  At June 30,  1999,  the total  amount  due the  Company,
including  interest,  was  approximately  $137,000  and  is  classified  in  the
stockholders'  equity  section of the balance  sheet as a note  receivable  from
officer and stockholder.

In October  1998,  the Company  accepted an unsecured  promissory  note totaling
$100,000  from its  Executive  Vice  President  and COO. The note was payable on
demand  including  interest  at the annual rate of 8.25% for the period that the
loan is outstanding.  In April 1999, the note, including all interest,  was paid
in full.

In January  1999,  the Company  accepted an unsecured  promissory  note totaling
$60,000 from its Vice President,  Product and Process Development.  The note was
payable upon the earlier of on the Company's  demand or July 28, 1999  including
interest  at an  annual  rate  of  8.75%  for  the  period  that  the  loan  was
outstanding.  The loan was made in connection  with the acceptance of employment
and the  corresponding  relocation of the officer.  At June 30, 1999,  the total
amount due the Company,  including  interest,  was approximately  $62,000 and is
included  as a  component  of other  current  assets.  In July  1999,  the note,
including all interest, was paid in full.

(4)  Earnings Per Share

Basic and diluted  Earnings Per Share ("EPS") are computed based on the net loss
for the relevant period,  adjusted for cumulative Series A Convertible Preferred
Stock (the "Series A Preferred Stock" or "Series A Preferred  Shares") dividends
and the assumed  incremental  yield  attributable  to the beneficial  conversion
feature in the preferred stock, divided by the weighted average number of shares
outstanding  during  the  period.  Potentially  dilutive  securities,  including
convertible preferred stock, options and warrants, have not been included in the
diluted EPS computation because they are anti-dilutive.


                                     Page 4
<PAGE>

(5)  Comprehensive Income (Loss)

The following table reconciles net loss to comprehensive loss:

<TABLE>
<CAPTION>

                                                     Three Months Ended              Six Months Ended
                                                          June 30,                       June 30,
                                               ----------------------------    ----------------------------
                                                   1999            1998            1999            1998
                                               -------------   ------------    ------------    ------------
<S>                                            <C>             <C>             <C>             <C>
Net loss ...................................   $ (8,131,000)   $ (4,788,000)   $(16,209,000)   $ (7,781,000)

Other comprehensive income:
   Unrealized holding gain arising
   during the period .......................         56,000         135,000          69,000         204,000
   Less: Reclassification adjustment for
             realized  gain (loss)  included
             in net loss ...................           --              --          (832,000)          2,000
                                               ------------    ------------    ------------    ------------
      Total other comprehensive income .....         56,000         135,000         901,000         202,000
                                               ------------    ------------    ------------    ------------
Total comprehensive loss ...................   $ (8,075,000)   $ (4,653,000)   $(15,308,000)   $ (7,579,000)
                                               ============    ============    ============    ============
</TABLE>

(6)  Loss on Securities Available for Sale

In October 1997, the Company entered into a  Collaborative  Research and License
Agreement with CombiChem Inc. ("CombiChem"). Concurrent with this agreement, the
Company  entered into a Stock Purchase  Agreement  pursuant to which the Company
purchased 312,500 shares of common stock of CombiChem,  as adjusted, for a total
purchase  price of $2,000,000.  The investment has been  classified as available
for sale and a long-term  asset. The market value of the investment in CombiChem
has declined  substantially from the date of original investment and the Company
has deemed this decline in market value to be other than temporary. Accordingly,
the cost basis in the  investment  in CombiChem  has been adjusted and a loss on
securities  available  for sale of $828,000  was  recorded in March 1999.  These
securities have not been sold by the Company.

(7)   Common Stock

On May 24, 1999, the date of the annual shareholders  meeting,  the stockholders
approved the amendment of the Company's certificate of incorporation to increase
the total  number of shares of Common Stock the Company is  authorized  to issue
from 45,000,000 shares to 60,000,000 shares.

(8)   Stock Options and Warrants

On May 24, 1999, the date of the annual shareholders  meeting,  the stockholders
approved an amendment to the  Company's  1996  Incentive  Stock Option Plan (the
"1996 ISO Plan") to increase  the total  number of shares of Common  Stock which
may be issued  pursuant to options  which may be granted under the 1996 ISO Plan
from  3,000,000  to  4,000,000,  which  number shall be reduced by the number of
shares of Common  Stock  which  have been or may be issued  pursuant  to options
granted  under the  Company's  1996  Non-Qualified  Stock Option Plan (the "1996
Non-Qualified Plan").

The stockholders  also approved  amendments to the Company's 1996  Non-Qualified
Plan to (i)  increase  the total  number of shares of Common  Stock which may be
issued  pursuant to options  which may be granted  under the 1996  Non-Qualified
Plan from 3,000,000 to 4,000,000, which number shall be reduced by the number of
shares of common  stock  which  have been or may be issued  pursuant  to options
granted under the Company's  1996 ISO Plan,  and (ii) increase the annual option
grant made to members of the Board of  Directors  and the  Chairman  who are not
full-time employees of the Company under the 1996 Non-Qualified Plan. The annual
option grant to  non-employee  members of the Board of Directors  increased from
2,500 to 15,000 and the annual option grant to the Chairman increased from 2,500
to 30,000.


                                     Page 5
<PAGE>

The stockholders  approved the grant of an option to the Company's President and
Chief Executive  Officer to purchase  1,000,000  shares of Common Stock at a per
share exercise price equal to $18.25, the last reported sale price of the Common
Stock on the date shareholder  approval was obtained at the annual  shareholders
meeting.  The  option  will vest no later than six years from the grant date and
specified  amounts are subject to earlier  vesting if specified  Company  Common
Stock price thresholds are met.

The stockholders approved the grant of an option to the Company's Executive Vice
President and Chief Operating Officer to purchase 650,000 shares of Common Stock
at a per share exercise  price equal to $18.25,  the last reported sale price of
the Common  Stock on the date  shareholder  approval  was obtained at the annual
shareholders  meeting.  The  option  will vest no later  than six years from the
grant date and  specified  amounts are subject to earlier  vesting if  specified
Company Common Stock price thresholds are met.


(9)  Reclassification

Certain  amounts  previously  reported have been  reclassified to conform to the
current year's presentation.

(10)  Collaborative Agreements

The Company has a development  and license  agreement  with Merck KGaA ("Merck")
with  respect  to C225,  its lead  interventional  therapeutic  product  for the
treatment of cancer. In exchange for certain  marketing and development  rights,
the Company can receive up to $60,000,000 in milestone payments  ($30,000,000 of
which are equity based)  assuming the  achievement  of certain  milestones and a
$30,000,000  secured  line  of  credit  or  guaranty  for  the  build-out  of  a
manufacturing  facility for the  commercial  production  of C225.  The agreement
provides that among other  reasons,  it may be terminated by either party if the
Company and Merck failed to agree on a production  concept for the manufacturing
facility or if Merck had not provided  the Company  with the credit  facility or
guaranty by April 15, 1999,  in which case Merck is entitled to receive back all
milestone  payments made to date.  Additionally,  the Company must timely obtain
certain  collateral  license  agreements,  and the failure to do so will entitle
Merck to receive back all  milestone  payments  made to date.  In April 1999 the
parties agreed on the production concept for the manufacturing  facility and are
currently  working toward securing the credit  facility or guaranty.  As of June
30, 1999,  the Company has received  $12,000,000  in milestone  payments.  These
payments  have been  recorded  as fees  potentially  refundable  from  corporate
partner and will be  recognized  as revenue  upon Merck's  providing  the credit
facility or guaranty and the Company's  obtaining the defined collateral license
agreements.

Item 2. Management's  Discussion and Analysis of Financial Condition and Results
of Operations.

The following  discussion and analysis by our management is provided to identify
certain  significant factors which affected our financial position and operating
results during the periods included in the accompanying financial statements.

                              RESULTS OF OPERATIONS

Six Months Ended June 30, 1999 and 1998

Revenues.

Revenues  for the six months  ended  June 30,  1999 and 1998 were  $883,000  and
$2,615,000, respectively, a decrease of $1,732,000, or 66%. Revenues for the six
months  ended June 30,  1999  primarily  consisted  of (i)  $150,000 in research
support from our partnership with American Home Products Corporation  ("American
Home") in  infectious  disease  vaccines,  (ii) $533,000 in research and support
payments  from our research and license  agreement  with Merck for our principal
cancer vaccine  product  candidate,  BEC2, and (iii) $195,000 in royalty revenue
from our strategic alliance with Abbott Laboratories  ("Abbott") in diagnostics.
Revenues  for the six months  ended June 30, 1998  consisted  of (i) $150,000 in
research support from our partnership  with American Home in infectious  disease
vaccines,  (ii)  $1,000,000 in milestone  revenue and $1,250,000 in research and
support  payments  from our research and license  agreement  with Merck for BEC2
(iii)  $117,000 in royalty  revenue from our  strategic  alliance with Abbott in


                                     Page 6
<PAGE>

diagnostics and (iv) $98,000 from a Phase I Small Business  Innovation  Research
grant  from the  National  Cancer  Institute  for a  program  in  cancer-related
angiogenesis.  The  decrease in revenues  for the six months ended June 30, 1999
was primarily  attributable  to (i) the decrease in research and support revenue
as a result of the completion of all research and support  payments due from our
research  and  license  agreement  with  Merck for BEC2 and (ii) a  decrease  in
milestone revenue which can vary widely from period to period depending upon the
timing of the  achievement of various  research and  development  milestones for
products under development.

Operating; Research and Development Expenses.

Total  operating  expenses  for the six months ended June 30, 1999 and 1998 were
$17,182,000 and $11,805,000,  respectively,  an increase of $5,377,000,  or 46%.
Research  and  development  expenses  for the six months ended June 30, 1999 and
1998 were $13,505,000 and $8,846,000, respectively, an increase of $4,659,000 or
53%.  Such amounts for the six months  ended June 30, 1999 and 1998  represented
79% and 75%, respectively, of total operating expenses. The increase in research
and  development  expenses for the six months ended June 30, 1999 was  primarily
attributable to (i) the costs  associated with an agreement for the supplemental
further   development   and   manufacture  of  clinical  grade  C225,  our  lead
interventional  therapeutic product candidate for cancer, to support ongoing and
future human clinical  trials,  (ii) the costs associated with the initiation of
Phase III clinical studies of C225,  (iii)  expenditures in the functional areas
of  product   development,   manufacturing,   clinical  and  regulatory  affairs
associated with C225 and (iv) expenditures  associated with additional  staffing
in the area of discovery research.

General and Administrative Expenses.

General and  administrative  expenses  include  administrative  personnel costs,
costs incurred in connection with pursuing  arrangements with corporate partners
and  technology  licensors,  and expenses  associated  with  applying for patent
protection  for our  technology  and products.  Such expenses for the six months
ended June 30, 1999 and 1998 were  $3,677,000 and $2,959,000,  respectively,  an
increase  of  $718,000,  or 24%.  The  increase  in general  and  administrative
expenses  primarily  reflected (i) additional support staffing for the expanding
research,  development,  clinical  manufacturing  and  marketing  efforts of the
Company, particularly with respect to C225 and (ii) expenses associated with the
pursuit  of  strategic  corporate  alliances  and  other  corporate  development
expenses.  We expect general and  administrative  expenses to increase in future
periods to support our planned increases in research, development,  clinical and
manufacturing efforts.

Interest and Other Income or Loss and Interest Expense.

Interest  income was  $1,168,000 for the six months ended June 30, 1999 compared
to $1,607,000 for the six months ended June 30, 1998, a decrease of $439,000, or
27%. The decrease was primarily  attributable  to the decrease in our investment
portfolio as a result of funding our operations.  Interest  expense was $246,000
and $200,000 for the six months ended June 30, 1999 and 1998,  respectively,  an
increase of $46,000 or 23%. Interest expense for both periods primarily included
(i) interest on an  outstanding  Industrial  Development  Revenue Bond issued in
1990 (the  "1990 IDA  Bond")  with a  principal  amount of  $2,200,000  and (ii)
interest  recorded on various  capital lease  obligations  under a December 1996
Financing Agreement (the "1996 Financing Agreement") and an April 1998 Financing
Agreement (the "1998 Financing  Agreement") with Finova Technology Finance, Inc.
("Finova").  The increase was primarily attributable to entering into additional
capital leases. We recorded losses on securities  available for sale for the six
months  ended June 30,  1999 in the amount of  $832,000  as compared to gains of
$2,000 for the six months ended June 30, 1998. The loss for the six months ended
June 30,  1999 is  primarily  attributable  to the  $828,000  write-down  of our
investment  in  CombiChem  Inc.  ("CombiChem")  as a  result  of  other  an than
temporary decline. See "Liquidity and Capital Resources".

Net Losses.

We had net losses to common  stockholders  of $18,071,000 or $0.73 per share for
the six months ended June 30, 1999 compared  with  $9,606,000 or $0.40 per share
for the six months ended June 30,  1998.  The increase in the net losses and per
share net loss to common  stockholders  was due  primarily to the factors  noted
above.


                                     Page 7
<PAGE>

Three Months Ended June 30, 1999 and 1998

Revenues.

Revenues  for the three  months  ended June 30, 1999 and 1998 were  $254,000 and
$765,000,  respectively,  a decrease of $511,000, or 67%. Revenues for the three
months ended June 30, 1999 consisted of (i) $75,000 in research support from our
partnership with American Home in infectious disease vaccines,  (ii) $108,000 in
research and support payments from our research and license agreement with Merck
for BEC2, and (iii) $71,000 in royalty revenue from our strategic  alliance with
Abbott  in  diagnostics.  Revenues  for the three  months  ended  June 30,  1998
consisted of (i) $75,000 in research  support from our partnership with American
Home in  infectious  disease  vaccines,  (ii)  $625,000 in research  and support
payments  from our  research  and  license  agreement  with Merck for BEC2 (iii)
$65,000  in  royalty  revenue  from  our  strategic   alliance  with  Abbott  in
diagnostics.  The  decrease in revenues for the three months ended June 30, 1999
was primarily  attributable to the decrease in research and support revenue as a
result of the  completion  of all  research  and support  payments  due from our
research and license agreement with Merck for BEC2.

Operating; Research and Development Expenses.

Total operating  expenses for the three months ended June 30, 1999 and 1998 were
$8,826,000 and  $6,221,000,  respectively,  an increase of  $2,605,000,  or 42%.
Research and  development  expenses for the three months ended June 30, 1999 and
1998 were $7,151,000 and $4,675,000,  respectively, an increase of $2,476,000 or
53%. Such amounts for the three months ended June 30, 1999 and 1998  represented
81% and 75%, respectively, of total operating expenses. The increase in research
and development  expenses for the three months ended June 30, 1999 was primarily
attributable to (i) the costs  associated with an agreement for the supplemental
further  development  and  manufacture of clinical grade C225 to support ongoing
and future human clinical trials,  (ii) the costs associated with the initiation
of Phase III clinical  studies of C225,  (iii)  expenditures  in the  functional
areas of product  development,  manufacturing,  clinical and regulatory  affairs
associated with C225 and (iv) expenditures  associated with additional  staffing
in the area of discovery research.

General and Administrative Expenses.

General and  administrative  expenses  include  administrative  personnel costs,
costs incurred in connection with pursuing  arrangements with corporate partners
and  technology  licensors,  and expenses  associated  with  applying for patent
protection for our  technology and products.  Such expenses for the three months
ended June 30, 1999 and 1998 were  $1,675,000 and $1,546,000,  respectively,  an
increase of $129,000, or 8%. The increase in general and administrative expenses
primarily  reflected (i) additional support staffing for the expanding research,
development,  clinical  manufacturing  and  marketing  efforts  of the  Company,
particularly with respect to C225 and (ii) expenses  associated with the pursuit
of strategic corporate alliances and other corporate  development  expenses.  We
expect  general and  administrative  expenses  to increase in future  periods to
support  our  planned   increases   in  research,   development,   clinical  and
manufacturing efforts.

Interest and Other Income and Interest Expense.

Interest  income was $564,000 for the three months ended June 30, 1999  compared
to $777,000 for the three months ended June 30, 1998, a decrease of $213,000, or
27%. The decrease was primarily  attributable  to the decrease in our investment
portfolio as a result of funding our operations.  Interest  expense was $123,000
and $110,000 for the three months ended June 30, 1999 and 1998, respectively, an
increase of $13,000 or 12%. Interest expense for both periods primarily included
(i)  interest  on an  outstanding  1990  IDA Bond  with a  principal  amount  of
$2,200,000 and (ii) interest recorded on various capital lease obligations under
the 1996 Financing  Agreement and the 1998 Financing  Agreement with Finova. The
increase was primarily attributable to entering into additional capital leases.


                                     Page 8
<PAGE>

Net Losses.

We had net losses to common  stockholders  of  $9,065,000 or $0.36 per share for
the three months ended June 30, 1999 compared with $5,755,000 or $0.24 per share
for the three months ended June 30, 1998. The increase in the net losses and per
share net loss to common  stockholders  was due  primarily to the factors  noted
above.

                         LIQUIDITY AND CAPITAL RESOURCES

At June 30, 1999, our principal sources of liquidity  consisted of cash and cash
equivalents  and  short-term  securities  available  for  sale of  approximately
$40,678,000. We have financed our operations since inception primarily through:

o     the proceeds from the public and private sales of our equity securities.

o     license fees.

o     contract research and development fees.

o     royalties received under agreements with collaborative partners.

o     interest earned on these funds.

o     the sale of three issues of Industrial Development Revenue Bonds (the "IDA
      Bonds") through the New York Industrial Development Agency (the "NYIDA").

Since inception:

o     public and private sales of equity  securities  in financing  transactions
      have raised approximately $163,799,000 in net proceeds.

o     we have earned  approximately  $33,738,000  from  license  fees,  contract
      research and development fees and royalties from  collaborative  partners,
      including  approximately  $883,000 earned during the six months ended June
      30,  1999.  Additionally,  we have  received  $12,000,000  in  potentially
      refundable  milestone fees from our C225 development and license agreement
      with Merck.  These  amounts  have yet to be  recognized  as  revenue.  See
      Footnote  8,  "Collaborative  Agreements",  of the  Notes to  Consolidated
      Financial Statements.

o     we have earned  approximately  $9,631,000  in interest  income,  including
      approximately $1,168,000 earned during the six months ended June 30,1999.

o     the  sale of the IDA  Bonds  in each of 1985,  1986  and  1990  raised  an
      aggregate  of  $6,313,000,  the  proceeds  of which have been used for the
      acquisition, construction and installation of our research and development
      facility  in  New  York  City,  and  of  which   $2,200,000  is  currently
      outstanding.

We  signed a  definitive  agreement  in April  1999  with  Boehringer  Ingelheim
Pharmaceuticals  KG  ("BI   Pharmaceuticals")   for  the  further   development,
production  scale-up and manufacture of the Company's lead  therapeutic  product
candidate,  C225, for use in human clinical  trials.  Services  pursuant to this
agreement  commenced in April 1998  pursuant to an agreement  in  principle.  We
estimate  that  the  total  cost  under  the  agreement,  including  the cost of
additional  amounts  of  material  we  have  the  right  to  request,   will  be
DM12,100,000 or $6,392,000.  As of June 30, 1999, we have incurred approximately
DM3,940,000,  of which  DM3,130,000  has been paid, for services  provided under
this agreement.

In October 1997, we entered into a Collaborative  Research and License Agreement
with CombiChem to discover and develop novel small  molecules  against  selected
targets for the  treatment  of cancer.  At the same time as we entered into this
agreement,  we entered  into a Stock  Purchase  Agreement  pursuant  to which we
purchased 312,500 shares of common stock of CombiChem,  as adjusted, for a total
purchase price of $2,000,000.  The investment has been classified as a long-term
asset.   The  market  value  of  our   investment   in  CombiChem  had  declined
substantially  from the date of our  investment.  In March 1999,  we deemed this
decline  in  market  value  to be other  than  temporary.  Accordingly,  we have
adjusted  our cost basis in the  investment  and  recorded a loss on  securities
available  for sale of $828,000 in the first quarter of 1999.  These  securities
have not been  sold and we will  continue  to  monitor  our cost  investment  in
CombiChem.


                                     Page 9
<PAGE>

We have obligations under various capital leases for certain laboratory,  office
and computer  equipment and also certain building  improvements  primarily under
the 1996 Financing  Agreement and the 1998 Financing  Agreement with Finova. The
1996 Financing  Agreement  allowed us to finance the lease of equipment and make
certain  building and leasehold  improvements to existing  facilities  involving
amounts totaling  approximately  $2,500,000.  Each lease has a fair market value
purchase  option at the  expiration  of a 42-month  term.  Pursuant  to the 1996
Financing Agreement, we issued to Finova a warrant expiring December 31, 1999 to
purchase  23,220  shares of our common  stock at an exercise  price of $9.69 per
share.  We  recorded a non-cash  debt  discount  of  approximately  $125,000  in
connection  with this  financing,  which  discount is being  amortized  over the
42-month  term of the first  lease.  The 1996  Financing  Agreement  with Finova
expired in December 1997 and we utilized only  $1,745,000 of the full $2,500,000
under the agreement. In April 1998, we entered into the 1998 Financing Agreement
with Finova totaling approximately  $2,000,000.  The terms of the 1998 Financing
Agreement are substantially  similar to the now expired 1996 Financing Agreement
except that each lease has a 48-month  term. As of June 30, 1999, we had entered
into twelve  individual  leases under both the 1996 Financing  Agreement and the
1998  Financing  Agreement  aggregating  a total  cost of  $3,695,000.  The 1998
Financing Agreement expired in May 1999.

We have  spent and will  continue  to spend in the future  substantial  funds to
continue the research and development of our products,  conduct pre-clinical and
clinical trials, establish clinical-scale and commercial-scale  manufacturing in
our own facilities or in the facilities of others,  and market our products.  We
have  continued  to  engage  in  discussions  with  major   pharmaceutical   and
biopharmaceutical   companies  regarding  various  alternatives  concerning  the
funding of research and  development  for certain of our products.  No assurance
can be given that we will be successful in consummating  any such  alternatives.
Such strategic alliances could include up-front license fees plus milestone fees
and revenue  sharing.  There can be no assurance  that we will be  successful in
achieving such alliances,  nor can we predict the amount of funds which might be
available  to us if we  entered  into such  alliances  or the time at which such
funds would be made available or the other terms of any such alliances.

In January 1998, we completed the construction and  commissioning of a new 1,750
square foot process development center at our Somerville, New Jersey facility at
a cost of approximately $1,650,000.

Under our  agreement  with Merck for C225, we developed,  in  consultation  with
Merck, a production concept for a new manufacturing  facility for the commercial
production of C225. Merck is to provide us, subject to certain conditons, with a
$30  million  secured  line of  credit or  guaranty  for the  build-out  of this
facility.  We have  determined  to erect this  facility  adjacent to our current
manufacturing facility in New Jersey which supplies C225 to support our clinical
trials.

We rent our New York City  facility  under a lease which was scheduled to expire
in March 1999.  We renewed the entire lease for a term  commencing as of January
1, 1999 through  December 2004 and have begun to retrofit the facility to better
suit our needs at an expected cost of approximately $2,000,000.

The 1990 IDA Bond in the outstanding  principal amount of $2,200,000 becomes due
in 2004.  We will  incur  annual  interest  on the  1990  IDA  Bond  aggregating
approximately  $250,000.  In order to secure our  obligations to the NYIDA under
the 1990 IDA Bond,  we have  granted  the NYIDA a security  interest in facility
equipment purchased with the bond proceeds.

The holders of the 400,000  shares of Series A Convertible  Preferred  Stock are
entitled to receive  cumulative  dividends at an annual rate of $6.00 per share.
Dividends  accrue as of the issuance  date of the Series A Preferred  Shares and
are payable on the outstanding  Series A Preferred Shares in cash on December 31
of each  year  beginning  December  31,  1999 or at the  time of  conversion  or
redemption of the Series A Preferred Shares on which the dividend is to be paid,
whichever is sooner. Accrued dividends were $3,702,000 at June 30, 1999.

Total capital  expenditures  made during the six months ended June 30, 1999 were
$2,542,000,  of which $532,000 have been reimbursed in accordance with the terms
of the 1998 Financing  Agreement with Finova. Of the total capital  expenditures
made  during the  six-months  ended  June 30,  1999,  $1,392,000  related to the
purchase  of  equipment  for and  costs  associated  with  the  retrofit  of our
corporate  office and research  laboratories in New York. The balance of capital
additions  include  $933,000  associated  with the  build-out of the  commercial
manufacturing facility to be erected adjacent to our current


                                    Page 10
<PAGE>

manufacturing  facility  in  New  Jersey.  The  remaining  $217,000  related  to
improving and equipping our existing manufacturing facility.

We expect that our existing  capital  resources  and expected  future cash flows
should  enable us to maintain  our current and planned  operations  through June
2001. Certain milestone payments,  including $18,000,000 in cash based milestone
payments  and  $30,000,000  in equity  based  milestone  payments  from our C225
development  and license  agreement  with Merck,  are to be paid  subject to our
attaining research and development milestones. There can be no assurance that we
will achieve these  milestones.  Additionally,  the termination of the agreement
due to Merck's failure to provide the credit facility or guaranty or our failure
to obtain the necessary collateral license agreements would require us to return
all milestone  payments  made to date.  Our future  working  capital and capital
requirements will depend upon numerous factors, including, but not limited to:

o     progress of our research and development  programs,  pre-clinical  testing
      and clinical trials.

o     our corporate partners fulfilling their obligations to us.

o     timing and cost of seeking and obtaining regulatory approvals.

o     timing and cost of manufacturing scale-up and effective  commercialization
      activities and arrangements.

o     level of resources  that we devote to the  development  of  marketing  and
      sales capabilities.

o     costs involved in filing, prosecuting and enforcing patent claims.

o     technological advances.

o     status of competitors.

o     our  ability  to  maintain   existing  and  establish  new   collaborative
      arrangements  with other  companies  to provide  funding to support  these
      activities.

o     costs  of   establishing   both  clinical  scale  and   commercial   scale
      manufacturing capacity in our facility and those of others.

In order to fund our capital needs after June 2001, we will require  significant
levels  of  additional  capital  and we  intend  to raise  the  capital  through
additional arrangements with corporate partners,  equity or debt financings,  or
from other sources  including the proceeds of product sales, if any. There is no
assurance that we will be successful in consummating any such  arrangements.  If
adequate funds are not available,  we may be required to  significantly  curtail
our planned operations.

Uncertainties  associated  with the  length  and  expense  of  pre-clinical  and
clinical  testing of any of our product  candidates  could greatly  increase the
cost of  development  of such products and affect the timing of any  anticipated
revenues from product sales. Our failure to obtain  regulatory  approval for any
product will preclude its commercialization.  In addition, our failure to obtain
sufficient  patent  protection for our products may make certain of our products
commercially unattractive.

At December 31, 1998, we had net operating loss carryforwards for federal income
tax purposes of  approximately  $129,485,000  which expire at various dates from
2000 through 2018. At December 31, 1998 we had research credit  carryforwards of
approximately  $3,642,000  which expire at various  dates between years 2009 and
2018.  Pursuant to Section 382 of the Internal Revenue Code of 1986, as amended,
the annual  utilization  of a company's net operating  loss and research  credit
carryforwards may be limited if the company experiences a change in ownership of
more than 50  percentage  points  within a  three-year  period.  Since 1986,  we
experienced  two such  ownership  changes.  Accordingly,  our net operating loss
carryforwards  available to offset future federal  taxable income arising before
such ownership  changes are limited to $5,159,000  annually.  Similarly,  we are
restricted  in using our  research  credit  carryforwards  arising  before  such
ownership changes to offset future federal income tax expense.

Year 2000

The "Year 2000  problem"  involves  mainly  the  inability  of certain  computer
programs and microprocessing  devices to differentiate between the year 1900 and
the year 2000  because  two-digit  rather  than  four-digit  fields were used to
identify the year. There are a variety of related "date" problems, including the
use by older  programs  and devices of  algorithms  that will fail to  correctly
identify the year 2000 and certain  other years in the  twenty-first  century as
leap years. A Year 2000 problem could cause a computer system or  microprocessor
that is date  sensitive  to  malfunction,  resulting  in system  failures.  Such
failures  could  cause  disruptions  of  our  operations,   including,   without
limitation, the systems in place at our Branchburg clinical-scale  manufacturing
facility,  computers,  communication devices and laboratory  instrumentation


                                    Page 11
<PAGE>

and systems  which use dated  information  in our research and  development  and
scientific testing or, possibly, in our pre-clinical or clinical trials.

To deal with the Year 2000  problem we have  developed a year 2000  program that
has three main phases:  (i) review of information  technology  ("IT") and non-IT
systems for the purposes of assessing the  potential  impact of Year 2000 on our
business and identifying  non-Year 2000 compliant systems;  (ii) remediation and
development  of  contingency  plans;  and (iii)  testing.  These  phases are not
necessarily sequential. We have a Year 2000 team to coordinate and carry out the
various  phases  and  Reporting  Responsible  Persons  in  each  critical  area,
including computer hardware,  software,  other hardware,  laboratory  equipment,
collaborators  and  process/clinical  development.  While  we  believe  that our
program is and will be adequate to address Year 2000  problems,  there can be no
assurance  that our  operations  will not be adversely  affected.  While we have
devoted significant resources to dealing with the Year 2000 problem, our efforts
to date have not caused the deferral of any other significant IT projects.

We have  reviewed  the  potential  impact of the "Y2K" bug on our  research  and
development, product development,  manufacturing,  financial,  communication and
administrative  operations.  We  determined  which  systems are  critical to our
business. We also determined which systems were non-year 2000 compliant.

We  are  in  the  process  of   remediating   through   corrective   programming
modifications  or  system  replacement  all  mission  critical  systems  that we
identified  as  non-compliant.  We estimate  that this process is  substantially
completed and that it will be finished by September  30, 1999. In addition,  for
systems  that we have  identified  as  non-mission  critical,  we also intend to
either correct them through  programming  changes or replace them with compliant
software and any necessary  hardware or, possibly,  simply discontinue using the
system.

We have  already  developed  testing  protocols  and have begun  testing for all
mission-critical   systems.  We  have  substantially   completed  these  testing
protocols  and expect to be finished no later than  September  30, 1999.  We are
also in the process of testing other systems,  and expect to have completed that
process no later than September 30, 1999.

We have incurred  approximately  $350,000 on our Year 2000 program  through June
30,  1999.  This  includes  the  purchase of  third-party  software and required
hardware to run such  software  as well as the cost of  modifying  software.  We
estimate that any  additional  costs  incurred to complete the second phase will
not be material.

In addition to the review of internal  systems,  we have identified and begun to
make inquiries of our critical  suppliers,  corporate  partners,  manufacturers,
clinical study sites,  service  suppliers,  communications  providers,  lessors,
utilities,  and banks whose system failures or non-compliant products could have
an adverse impact on our  operations.  We expect to complete the  identification
and assessment  process for such entities prior to September 30, 1999.  While we
are not  currently  aware of any  material  Year 2000  problems  involving  such
entities that are likely to adversely  affect us, there can be no assurance that
there will not be such  problems  or that,  if  discovered,  they will be timely
remediated.

We are in the  process of  developing  contingency  plans to deal with  possible
disruptions  of  important  operations  such  as  discovery  research,   product
development,  manufacturing and ongoing clinical trials.  Such disruptions could
affect the development and ultimate  marketing of potential  products as well as
put us at a competitive  disadvantage  relative to companies that have corrected
such  problems.  These  contingency  plans  may  need  to  be  refined  as  more
information becomes available.

Certain Factors Affecting Forward-Looking Statements--Safe Harbor Statement

         Those  statements  contained  herein  that do not relate to  historical
information are forward-looking  statements.  There can be no assurance that the
future  results  covered by such  forward-looking  statements  will be achieved.
Actual results may differ materially due to the risks and uncertainties inherent
in  the  Company's  business,   including  without  limitation,  the  risks  and
uncertainties associated with completing pre-clinical and clinical trials of the
Company's  compounds that demonstrate such compounds' safety and  effectiveness;
obtaining  additional financing to support the Company's  operations;  obtaining
and maintaining  regulatory approval for such compounds and complying with other
governmental


                                    Page 12
<PAGE>

regulations  applicable to the Company's  business;  obtaining the raw materials
necessary  in the  development  of such  compounds;  consummating  collaborative
arrangements  with  corporate  partners  for  product   development;   achieving
milestones under collaborative arrangements with corporate partners;  developing
the  capacity  and  ability  to  manufacture,  as well as  market  and  sell the
Company's products,  either directly or with collaborative partners;  developing
market demand for and acceptance of such products;  competing  effectively  with
other   pharmaceutical  and   biotechnological   products;   obtaining  adequate
reimbursement  from third party payors;  attracting and retaining key personnel;
protecting  proprietary  rights;  failing to remedy  Year 2000  problems  by the
Company or the failure by those entities associated with the Company;  and those
other factors set forth in  "Management's  Discussion  and Analysis of Financial
Condition  and  Results  of  Operations--Overview  and  Risk  Factors,"  in  the
Company's most recent Annual Report on Form 10-K.

Item 3. Quantitative and Qualitative Disclosures About Market Risk.

Our  holdings of  financial  instruments  are  comprised of a mix of any of U.S.
corporate  debt,   foreign  corporate  debt,  U.S.   government  debt,   foreign
government/agency guaranteed debt and commercial paper. All such instruments are
classified as  securities  available  for sale.  Generally,  we do not invest in
portfolio  equity  securities or  commodities or use financial  derivatives  for
trading purposes.  Our debt security portfolio represents funds held temporarily
pending use in our business and operations.  We manage these funds  accordingly.
We seek reasonable  assuredness of the safety of principal and market  liquidity
by investing in rated fixed income  securities while at the same time seeking to
achieve  a  favorable  rate  of  return.   Our  market  risk  exposure  consists
principally  of exposure to changes in interest  rates.  Our  holdings  are also
exposed to the risks of changes in the credit  quality of issuers.  We typically
invest in the  shorter-end  of the maturity  spectrum,  or if longer,  in highly
liquid debt instruments with periodic  interest rate  adjustments.  We also have
certain  foreign  exchange  currency risk, see footnote 2. We do not consider it
necessary to implement a currency  hedging  program since  currently,  we do not
generally enter into contracts denominated in foreign currencies.

The table below  presents the  principal  amounts and related  weighted  average
interest rates by year of maturity for our  investment  portfolio as of June 30,
1999:

<TABLE>
<CAPTION>
                                                                         2004 and
                    1999       2000         2001        2002    2003    Thereafter          Total       Fair Value
                 ---------  ----------    ---------    ------  ------  ------------       --------      -----------

<S>               <C>       <C>          <C>            <C>    <C>    <C>                <C>             <C>
Fixed Rate           -      $2,739,000        -           -      -           -           $2,739,000      $2,744,000
Average
Interest Rate        -            5.10%       -           -      -           -                5.20%        -

Variable Rate        -            -      $1,136,000(1)    -      -     $33,952,000(1)   $35,088,000     $35,262,000
Average
Interest Rate        -            -            5.43%      -      -              5.17%         5.18%        -

                  --------   ----------  ------------  ------  ------  -------------    -----------     -----------
                     -       $2,739,000  $1,136,000(1)    -      -     $33,952,000(1)   $37,827,000     $38,006,000
                  ========   ==========  ============  ======  ======  =============    ===========     ===========
</TABLE>

(1) These holdings consist of U.S. corporate and foreign corporate floating rate
notes.  Interest on the securities are adjusted at fixed dates using  prevailing
interest  rates.  These holdings are highly liquid and we consider the potential
for loss of principal to be minimal.


                                    Page 13
<PAGE>

PART II - OTHER INFORMATION

Item 4 - Submission of Matters to a Vote of Security Holders

      (a) An  annual  meeting  of  stockholders  was held on May 24,  1999  (the
"Annual Meeting").

      (b) The directors  elected at the Annual Meeting were Richard Barth,  Jean
Carvais,  Vincent T. DeVita,  Jr., Robert F. Goldhammer,  David M. Kies, Paul B.
Kopperl,  John  Mendelsohn,  William R.  Miller,  Harlan W. Waksal and Samuel D.
Waksal.  Such  persons are all of the  directors  of the  Company  whose term of
office as a director continued after the Annual Meeting.

      (c) The  matters  voted upon at the Annual  Meeting and the results of the
voting, including broker non-votes, where applicable, are set forth below.

      (i)   Election of directors

                                                                      Broker
   Name                          In Favor          Withheld          Non-Votes
   ----                          --------          --------          ---------
   Richard Barth                21,134,026          602,958             N/A
   Jean Carvais                 21,134,026          602,958             N/A
   Vincent T. DeVita, Jr.       21,134,026          602,958             N/A
   Robert F. Goldhammer         21,134,026          602,958             N/A
   David M. Kies                21,134,026          602,958             N/A
   Paul B. Kopperl              21,134,026          602,958             N/A
   John Mendelsohn              21,134,026          602,958             N/A
   William R. Miller            21,134,026          602,958             N/A
   Harlan W. Waksal             21,134,026          602,958             N/A
   Samuel D. Waksal             21,134,026          602,958             N/A

      (ii)  The  stockholders  approved  an  amendment  to  the  Company's  1996
            Incentive  Stock  Option Plan (the "1996 ISO Plan") to increase  the
            total number of shares of Common Stock which may be issued  pursuant
            to  options  which  may be  granted  under  the 1996  ISO Plan  from
            3,000,000 to 4,000,000,  which number shall be reduced by the number
            of shares of Common Stock which have been or may be issued  pursuant
            to options  granted under the  Company's  1996  Non-Qualified  Stock
            Option Plan (the "1996 Non-Qualified  Plan"). The stockholders voted
            7,365,864 shares in favor,  2,431,698 shares against,  74,069 shares
            abstained from voting and there were 11,865,353 broker non-votes.

      (iii) The   stockholders   approved   amendments  to  the  Company's  1996
            Non-Qualified  Plan to (i)  increase  the total  number of shares of
            Common  Stock which may be issued  pursuant to options  which may be
            granted  under  the  1996   Non-Qualified  Plan  from  3,000,000  to
            4,000,000,  which number shall be reduced by the number of shares of
            common  stock  which have been or may be issued  pursuant to options
            granted  under the  Company's  1996 ISO Plan,  and (ii) increase the
            annual  option grant made to members of the Board of  Directors  and
            the Chairman who are not  full-time  employees of the Company  under
            the 1996 Non-Qualified Plan. The stockholders voted 7,326,707 shares
            in favor,  2,460,425  shares against,  84,499 shares  abstained from
            voting and there were 11,865,353 broker non-votes.

      (iv)  The  stockholders   approved  a  proposal  to  amend  the  Company's
            certificate of  incorporation to increase the total number of shares
            of Common Stock the Company is authorized  to issue from  45,000,000
            shares to  60,000,000  shares.  The  stockholders  voted  21,245,136
            shares in favor,  424,054 shares against and 67,794 shares abstained
            from voting. Broker non-votes were not applicable.


                                    Page 14
<PAGE>

      (v)   The  stockholders  approved the grant of an option to the  Company's
            President and Chief Executive  Officer to purchase  1,000,000 shares
            of common  stock  pursuant  to a  specified  vesting  schedule.  The
            stockholders  voted  7,512,857  shares  in favor,  2,322,720  shares
            against,  131,454  shares  abstained  from  voting  and  there  were
            11,769,953 broker non-votes.

      (vi)  The  stockholders  approved the grant of an option to the  Company's
            Executive  Vice  President and Chief  Operating  Officer to purchase
            650,000  shares of common  stock  pursuant  to a  specified  vesting
            schedule.   The  stockholders   voted  7,364,733  shares  in  favor,
            2,372,994  shares against,  133,904 shares abstained from voting and
            there were 11,865,353 broker non-votes.

      (vii) The stockholders  ratified the appointment by the Board of Directors
            of  KPMG  LLP  as  the  Company's   independent   certified   public
            accountants  for the fiscal  year  ending  December  31,  1999.  The
            stockholders voted 21,635,440 shares in favor, 50,475 shares against
            and 51,069 shares  abstained from voting.  Broker non-votes were not
            applicable.

Item 6 - Exhibits and Reports on Form 8-K

      (a)   Exhibits (numbered in accordance with Item 601 of Regulation S-K)

            Exhibit No. Description

             3.1A       Amendment  dated June 4, 1999 to the Company's
                        certificate of incorporation, as amended

            10.72       Agreement  for Supply of Material  dated as of
                        January 1, 1997 between  the  Company,
                        Connaught  Laboratories  Limited,  a
                        Pasteur Merieux Company, and Merck KGaA*

            10.73       Development and Supply Agreement dated
                        as of April 30, 1999 between the Company
                        and Boehringer Ingelheim Pharma KG*

            27.1        Financial Data Schedule

            99.6        1996 Non-Qualified Stock Option Plan, as amended.

            99.7        1996 Incentive Stock Option Plan, as amended.

            *   Confidential treatment has been requested for a portion of this
                exhibit.

         (b)  Reports on Form 8-K

                None.


                                    Page 15
<PAGE>

                                   SIGNATURES

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.

                                        IMCLONE SYSTEMS INCORPORATED
                                        (Registrant)

Date: August 16, 1999              By   /s/ Samuel D. Waksal
                                        ----------------------------------------
                                        Samuel D. Waksal
                                        President and Chief Executive Officer

Date: August 16, 1999              By   /s/ Carl S. Goldfischer
                                        ----------------------------------------
                                        Carl S. Goldfischer
                                        Vice President, Finance and Chief
                                        Financial Officer


                                    Page 16



                                                                    Exhibit 3.1A

                            CERTIFICATE OF AMENDMENT
                                       TO
                          CERTIFICATE OF INCORPORATION
                                       OF
                          IMCLONE SYSTEMS INCORPORATED

                Under Section 242 of the General Corporation Law
                            of the State of Delaware

      The  undersigned,  being the Executive Vice  President of IMCLONE  SYSTEMS
INCORPORATED,  a Delaware corporation (the "Corporation") DOES HEREBY CERTIFY as
follows:

      FIRST:  The  Certificate  of  Incorporation  of the  Corporation is hereby
amended so that Article FOURTH (a) shall read in its entirety as follows:

            "FOURTH:  (a) The total number of shares of capital  stock which the
      Corporation   shall  have  the   authority  to  issue  is  sixty   million
      (60,000,000)  shares of Common  Stock with a par value of one tenth of one
      cent  ($.001) per share and four million  (4,000,000)  shares of Preferred
      Stock with a par value of one dollar ($1.00) per share."

      SECOND:  That such amendment was duly adopted by the Board of Directors of
the  Corporation  and by the  Stockholders of the Corporation in accordance with
Section 242 of the General Corporation Law of the State of Delaware.

      IN WITNESS  WHEREOF,  this  Certificate of Amendment to the Certificate of
Incorporation of the Corporation has been signed, and the statements made herein
affirmed as true under the penalties of perjury, this 2nd day of June 1999.


                                                     /s/Harlan W. Waksal
                                                     ------------------------
                                                     Harlan W. Waksal,
                                                     Executive Vice President


Attest:/s/ John  B. Landes
       -------------------------
       John B. Landes, Secretary



                                                                   Exhibit 10.72

                                                CONFIDENTIAL TREATMENT REQUESTED

                        AGREEMENT FOR SUPPLY OF MATERIAL

This AGREEMENT FOR SUPPLY OF MATERIAL (the "Agreement"), among

         Connaught  Laboratories  Limited,  a Pasteur Merieux Connaught company,
         incorporated  under the laws of Ontario,  Canada  with  offices at 1755
         Steeles Avenue West, Toronto, Ontario, Canada M2R 3T4, ("PMC")

and

         ImClone Systems  Incorporated,  a company  existing and organized under
         the laws of Delaware,  USA with offices at 180 Varick Street, New York,
         NY, USA 10014, ("ImClone")

and

         Merck  KGaA,  a company  incorporated  under the laws of  Germany  with
         offices at Frankfurter Strasse 250, 64271 Darmstadt, Germany, ("Merck")

is  effective  as of this 1st day of  January,  1997  ("Effective  Date"),  with
respect to the following facts and circumstances:

         WHEREAS PMC has a proprietary  interest in and manufactures and sells a
product known as BCG vaccine,  consisting of BCG in vaccine formulation with its
accompanying  diluent  in a  10-dose  vial  presentation  (hereinafter  the "BCG
Material"); and

         WHEREAS  ImClone and Merck  severally have a proprietary  interest in a
monoclonal  anti-idiotypic  antibody  known  as BEC2  (hereinafter  "BEC2")  and
jointly  are  performing  clinical  and  pre-clinical  research  relating to the
treatment and/or  prophylaxis of certain human cancers by  administration of the
BEC2; and

         WHEREAS ImClone and Merck intend to administer a combination therapy of
BEC2 and BCG  Material  to  certain  patients  with  small  cell lung  carcinoma
("SCLC") in a multi-national Phase III clinical trial being conducted in Europe,
Australia and the United States  (hereinafter the "SILVA Trial") pursuant to the
protocol(s)  and  investigators'  brochure(s)  (hereinafter  the "Clinical Trial
Protocol") attached hereto as Exhibit "A"; and

         WHEREAS, ImClone and Merck may administer a combination therapy of BEC2
and BCG Material to other patients in such  additional  clinical trials that are
necessary or advisable in the sole discretion of ImClone and Merck in connection
with or in furtherance of the SILVA Trial (the  "Additional  Clinical  Trials");
and

*** Confidential Treatment Requested

<PAGE>
                                      -2-


         WHEREAS  ImClone and Merck are  interested  in securing a supply of the
BCG  Material  to be  administered  with  BEC2 in the  SILVA  Trial and any such
Additional  Clinical  Trials,  and PMC is willing to supply the BCG  Material to
ImClone and Merck on the terms set forth herein.

         NOW THEREFORE, in consideration of the foregoing and for other good and
valuable  consideration,   the  receipt  and  sufficiency  of  which  is  hereby
acknowledged, the parties hereby agree as follows:

1.       Trials to be Conducted; Status of Recipient

         ImClone and Merck are  conducting  the SILVA  Trial and any  Additional
Clinical Trials together, and will receive supplies of the BCG Material together
or  independently  for the sole  purpose of  conducting  the SILVA Trial and the
Additional  Clinical Trials (the SILVA Trial and the Additional  Clinical Trials
are collectively referred to herein as the "Clinical Trials"). ImClone and Merck
shall be referred to for the purposes  herein as the "Recipient" and the term so
used shall mean ImClone and Merck together or either of them.  ImClone and Merck
shall be jointly and severally liable in respect of the obligations set forth in
this Agreement, except as specifically noted hereinbelow.

2.       Supply and Acceptance of Delivery

         2(a).    Quantities of the BCG Material

         Subject to the terms of this Agreement and during the [ *** ] following
the Effective Date  (hereinafter the "Supply  Period"),  PMC shall supply to the
Recipient, and the Recipient shall accept delivery from PMC of, the BCG Material
for use in and  during  the  Clinical  Trials  on the  following  dates,  in the
following quantities and with the following expiry dating:

                           (i)      [ *** ]

                           (ii)     [ *** ]

                           (iii)    [ *** ]

                           (iv)     [ *** ]

                           (A)      [ *** ]

                           (B)      [ *** ]

                           (C)      [ *** ]

                           (D)      [ *** ]

*** Confidential Treatment Requested

<PAGE>
                                      -3-


           [ *** ]

         2(b).    Cost of Supply

                  [ ***]

         2(c).    Delivery;  Risk of Loss

                  At  Recipient's  cost,  PMC shall  deliver or arrange  for the
delivery  of the  BCG  Material  to  Recipient,  FOB at a  point  or  points  of
destination  selected  by  Recipient,  to a  reputable  carrier.  Prior  to  any
delivery, Recipient shall forward import permits or other documents, as required
for shipment, to PMC to the attention of Ms. Joy Rennick, Logistics Coordinator,
(facsimile:  416-667-2275).  Upon delivery of the BCG Material,  Recipient shall
assume  all  risk of loss or  damage  for the BCG  Material  so  delivered.  All
temperature  monitoring  devices  shall be returned by  Recipient  to PMC to the
attention of Ms. Rennick.

         2(d).    Technical Services Assistance

                  Upon the reasonable request by Recipient, and in consideration
of payment by ImClone of PMC's costs and services  fees at a rate of [ *** ] for
regulatory/logistics  personnel,  PMC shall make,  and has made,  available  its
clinical/medical  and  regulatory/logistics  personnel  (at their usual place of
employment or by telephone) to provide reasonable levels of technical assistance
to the Recipient in connection with PMC's Regulatory Manufacturing Documentation
for the BCG Material or in connection  with the Recipient's  Regulatory  Filings
required for the Clinical  Trials.  ImClone shall pay PMC, by no later than July
15, 1998, the amount of [ *** ], representing the sum of:

                  (i)      [   ***  ]

                  (ii)     [   ***  ]

                  (iii)    [   ***  ]

                  (iv)     [   ***  ]

                  ImClone  agrees  to pay for  any  further  technical  services
provided by PMC and tests  conducted by or on behalf of PMC, in connection  with
this Agreement or the Clinical Trials,  at the hourly rates agreed to herein and
the costs to PMC of any such tests.  The  parties  agree that the  currency  for
payment shall be Canadian dollars.

         2(e).    Negotiations for Future Commercial Supply

                  In the event that the  Recipient  wishes to seek  registration
for the combination therapy of BEC2 and BCG Material, Recipient shall notify PMC
in writing.  PMC and the  Recipient  agree that  within  sixty (60) days of said
written notice from the Recipient, the parties

*** Confidential Treatment Requested

<PAGE>
                                      -4-


shall  initiate  good faith  negotiations  toward the  securing of a  commercial
supply  agreement  for the  purchase by  Recipient  of BCG  Material  with terms
satisfactory  to both parties,  including  without  limitation,  purchase price.
Failure to reach such  agreement  during the Term within  twelve  months (12) of
initiation of negotiations, or as of such earlier time when it is clear that the
parties cannot reach such  agreement,  shall be grounds for  termination of this
Agreement by either PMC or  Recipient,  upon thirty (30) days written  notice to
the other.

3.       Preparation and Conduct of the SILVA Trial

         3(a).    Regulatory Filings;  Manufacturing Regulatory Documentation

                  At  Recipient's  sole  cost,  Recipient  shall file and be the
owner of record for all Regulatory  Filings developed by the Recipient  relating
to  the  Clinical  Trials.  "Regulatory  Filing"  shall  mean  a  filing  with a
regulatory agency,  for example,  the US Food and Drug  Administration  ("FDA"),
that concerns the Clinical  Trials.  Recipient  owns and shall retain all right,
title and interest in and to BEC2 (and any improvements, progeny, derivatives or
related  materials  thereof) and the  Regulatory  Filings.  PMC shall permit the
Recipient to cross-reference  PMC's Product License  Application  Supplement and
Drug  Master  File for BCG  Material  and/or  otherwise  excerpt  portions of or
describe PMC's Product  License  Application  Supplement and Drug Master File in
the Regulatory  Filings,  to enable the Recipient to complete Regulatory Filings
required for the Clinical  Trials.  Notwithstanding  the foregoing,  the parties
agree  that  despite   Recipient's   cross-referencing   PMC's  Product  License
Application  Supplement and Drug Master File for BCG Material  and/or  otherwise
excerpting   portions  of  or  describing  PMC's  Product  License   Application
Supplement and Drug Master File in the Regulatory  Filings,  PMC owns, and shall
retain  all  right,  title  and  interest  in and to the BCG  Material  (and any
improvements,  progeny,  derivatives  or  related  materials  thereof)  and  the
Manufacturing Regulatory Documentation. "Manufacturing Regulatory Documentation"
shall  mean a  Product  License  Application,  Drug  Master  File  or any  other
regulatory filing or documentation owned, developed, submitted or prepared by or
on behalf of PMC and filed with appropriate regulatory authorities that contains
information   concerning  the  BCG  Material,   including  but  not  limited  to
information  concerning  the BCG Material  contained in the  Regulatory  Filings
which is excerpted from or describes PMC's Product  License  Application or Drug
Master File or other regulatory filing by or on behalf of PMC which concerns the
BCG Material,  which  information,  Recipient  agrees and  undertakes,  shall be
deemed and  treated as  Confidential  Information.  All  non-public  information
provided  by one  party to the other in  preparing  Regulatory  Filings  and the
Manufacturing  Regulatory  Documentation  shall  be  deemed  to be  Confidential
Information of the disclosing party for the purposes of this Agreement.

         3(b).    Protocols for Clinical Trials; Results

                  At Recipient's  sole cost,  Recipient shall be responsible for
the design, implementation, and evaluation of any human clinical studies used to
obtain  clinical  data for use in preparing  Regulatory  Filings  related to the
Clinical Trials.  Recipient shall conduct the Clinical Trials in compliance with
current Good Clinical Practices ("cGCP") pursuant to FDA regulations. Recipient,
at its sole cost, shall provide PMC with a complete copy of the protocols

*** Confidential Treatment Requested

<PAGE>
                                      -5-


and  investigators'  brochures for the Clinical Trials, as well as copies of all
reports,  abstracts and publications (subject to Section 5(c) herein) concerning
the data and results of the Clinical  Trials.  All right,  title and interest in
and to the data and  results of the  Clinical  Trials  shall vest in  Recipient;
provided that any information relating to the BCG Material shall remain the sole
property of PMC.

         3(c).    Adverse Reaction Reporting

                  Recipient  shall  promptly  notify PMC of any serious  adverse
reactions which result from the conduct of the Clinical Trials on the same basis
that such  reporting is made to the  appropriate  regulatory  authorities.  Such
notices  shall  be sent  by  Recipient  to PMC to the  attention  of Mrs.  Doris
Rudert-Dolby, Supervisor, Regulatory Affairs (facsimile: 416-667-2912). For this
purpose,  it is  understood  that an adverse  reaction  is subject to  expedited
reporting  to  appropriate  regulatory  authorities  if  such  adverse  reaction
constitutes an  "unexpected  adverse  reaction" and if the minimum  criteria for
expedited  reporting  are met (as such  criteria  are set forth in the ICH Topic
E2A:  Clinical  Safety Data Management - Definitions and Standards for Expedited
Reporting,  June 1, 1995). An "unexpected adverse reaction" is one the nature or
severity of which is not consistent  with the information in the relevant source
document (i.e., the most recent version of the investigators'  brochure).  It is
further  understood that  "SCLC-related  Deaths" are the end-points of the SILVA
Trial and are, therefore, not subject to expedited reporting.

         3(d). PMC's Notice in Connection With Actions by Regulatory Authorities

                  PMC shall  promptly  notify  Recipient  of any  threatened  or
pending  actions by regulatory  authorities  which may reasonably be believed to
affect the safety or efficacy claims of the BCG Material or to affect the supply
commitment  contained in this Agreement.  Any form of such notice that is not in
writing shall be promptly followed by notice in writing.

         3(e). Recipient's Notice in Connection With Actions by Regulatory
                 Authorities

                  Recipient  shall  promptly  notify  PMC of any  threatened  or
pending  actions by regulatory  authorities  which may reasonably be believed to
affect the safety or efficacy  claims of BEC2 or of the  combination  therapy of
BEC2 and BCG Material or to affect the Clinical Trials.  Any form of such notice
that is not in writing shall be promptly followed by notice in writing.

         3(f).    Recipient's Provision of Updated Investigators' Brochure

                  For the purpose of keeping  PMC  apprised of the status of the
Clinical  Trials,  Recipient  shall  provide  to  PMC  a  copy  of  all  updated
investigators'  brochures  which  Recipient  is required to file with the FDA or
other regulatory agency anywhere.

*** Confidential Treatment Requested

<PAGE>
                                      -6-


4.       Availability and Manufacture of BCG Material and of BEC2

         4(a).    BCG Material for Clinical Trials

                  During the Supply Period, PMC shall supply the BCG Material in
the quantities and according to the terms set forth in Sections  2(a)(i),  (ii),
(iii) and (iv); provided, however, that with respect to the quantities and terms
set forth in  Section  2(a)(iii)  and (iv),  PMC shall only be  required  to use
reasonable  commercial  efforts to make available to Recipient such BCG Material
as may be requested for the Additional  Clinical Trials. With respect to the BCG
Material requested pursuant to Sections 2(a)(iii) and 2(a)(iv),  in the event of
Force Majeure or of supply shortage or production constraint, PMC shall allocate
the available  quantities of BCG Material among PMC, its  affiliates,  customers
and distributors, including Recipient, in a commercially reasonable manner. Each
lot of BCG Material  released to the Recipient for the Clinical  Trials shall be
manufactured in compliance with current Good  Manufacturing  Practices  ("cGMP")
pursuant to FDA  regulations and according to  manufacturing  information in the
Manufacturing Regulatory Documentation.  PMC shall, or shall cause a third party
to,  perform  quality  control  testing  of the  BCG  Material  released  to the
Recipient to establish  compliance with any release  specifications  required by
the Manufacturing Regulatory Documentation.

         4(b).    BEC2 for Clinical Trials

                  During the Term,  Recipient  shall use  reasonable  commercial
efforts to have sufficient quantities of BEC2 for use in the Clinical Trials. In
the event of Force  Majeure  or of supply  shortage  or  production  constraint,
Recipient  shall  notify PMC as soon as possible so as to permit PMC to allocate
the above-noted quantities of BCG Material among PMC, its affiliates,  customers
and  distributors  at  PMC's  sole  discretion.  Each  lot of BEC2  released  by
Recipient for the Clinical  Trials shall be manufactured in compliance with cGMP
pursuant to FDA  regulations and according to  manufacturing  information in the
Regulatory  Filings.  Recipient  shall, or shall cause a third party to, perform
quality  control  testing  of BEC2 to  establish  compliance  with  any  release
specifications required by the Regulatory Filings.

         4(c).    BCG Material Specifications

                  PMC  shall  provide  BCG  Material  to  the  Recipient  in the
available  vialed  formulations  and vial sizes  specified  in the then  current
Manufacturing Regulatory Documentation.  PMC shall have no obligation under this
Agreement  to develop any other vial sizes or  formulations  of BCG Material for
the  Recipient.  PMC shall use  reasonable  commercial  efforts to maintain  the
integrity and consistency of all specifications  applicable to BCG. In the event
that PMC  deems  it  necessary  to  revise  any  specifications,  procedures  or
Manufacturing  Regulatory  Documentation  applicable to BCG Material,  PMC shall
provide  reasonable advance notice of any such revision to the Recipient for the
sole purpose of permitting  Recipient to revise the Clinical  Trial  Protocol or
Regulatory  Filings,  as  required.  All  specification  changes  that result in
procedures  or  limits  that  exceed  or  differ  from  those  set  forth in the
Manufacturing  Regulatory  Documentation  shall be  submitted  to the FDA before
being implemented to the extent the FDA so requires such submission.

*** Confidential Treatment Requested

<PAGE>
                                      -7-


         4(d).    Documentation

                  Upon  acceptance by Recipient of delivery of the BCG Material,
PMC shall provide the Recipient  with a  Certificate  of Analysis  applicable to
each lot of BCG Material delivered to the Recipient.  Complete batch records and
sufficient  retention  samples for the BCG Material  delivered to the  Recipient
shall be maintained at PMC for  inspection at any time by the Recipient at PMC's
place of business upon reasonable  prior written notice to PMC. Any confidential
or proprietary information of PMC or of its affiliates contained in such records
or samples shall be deemed to be Confidential Information of PMC.

         4(e).    PMC Facility Audits

                  Upon reasonable prior written notice to PMC, the Recipient may
(but shall not be  required  to) have its  representatives,  acting  reasonably,
audit PMC's production of the BCG Material to be used in the Clinical Trials for
compliance  with cGMP;  provided  however that such  representatives  shall have
first  signed  a   confidentiality   agreement  with  PMC.   Recipient  and  its
representatives shall comply with all applicable health,  safety,  environmental
and security laws and with PMC's policies and procedures  while present at PMC's
facilities.

         4(f).    Recall or Withdrawals

                  In  the  event  that  a  party  is  notified  of a  recall  or
withdrawal  of BEC2 or of the BCG  Material in any  country,  or  believes  such
recall  or  withdrawal  is  necessary,  it shall  immediately  notify  the other
parties.  The parties will consult on the necessity of, and appropriate  actions
and mutually  acceptable  procedures to be taken in connection with, a recall or
withdrawal.  If such recall or  withdrawal  is  undertaken,  the  parties  shall
cooperate in taking all reasonable and appropriate  action necessary to complete
such recall or withdrawal in a timely fashion.

5.       Confidentiality and Disclosure

         5(a).    General Obligations of Confidentiality

                  For a period of ten (10) years  following  any  disclosure  of
Confidential  Information  hereunder,  the Recipient  and PMC shall  maintain in
confidence the respective Confidential Information received or obtained from the
other,  and  use  such   Confidential   Information   solely  for  the  purposes
contemplated  and  permitted  by  this  Agreement.  Each  party  shall  maintain
communications to the other parties in confidence.  Each party acknowledges that
all Confidential  Information exchanged or developed hereunder shall be owned by
the  transferor  and  shall  continue  to be owned by the  transferor  following
transfer.  "Confidential  Information"  shall mean any and all  confidential  or
proprietary  information owned by PMC (or its affiliates) or by the Recipient or
either of ImClone or Merck (or their  affiliates)  that is provided to the other
parties.  Confidential  Information  shall not be deemed to include  information
that:

*** Confidential Treatment Requested

<PAGE>
                                      -8-


                  (i) is or  becomes  known  publicly  through  no  fault of the
receiving party;

                  (ii) is learned  by the  receiving  party  from a third  party
entitled to disclose it;

                  (iii) is developed by the  receiving  party  independently  of
information obtained from the disclosing party as shown by the receiving party's
written records;

                  (iv) is already  known to the receiving  party before  receipt
from the disclosing party, as shown by prior written records; or

                  (v)  is  released  with  the  prior  written  consent  of  the
disclosing party.

         5(b).    Permitted Disclosures

                  Notwithstanding  Section  5(a) hereof,  PMC and the  Recipient
shall,  upon prior  written  notice to the other  parties and only to the extent
necessary,   have  the  right  to  disclose  the  other  parties'   Confidential
Information  to regulatory or government  agencies for the purposes of preparing
or   supplementing   any   Regulatory   Filing   or   Manufacturing   Regulatory
Documentation,   as   applicable,   or  of   otherwise   assisting  in  securing
institutional  or government  approval to clinical test the BCG Material,  or as
required  by law  within  each  country  where  the  Clinical  Trials  are being
conducted.

         5(c).    Publications

                  The parties acknowledge that the data and results arising from
the Clinical Trials should be published and presented except to the extent where
such  publication  or  presentation  would be reasonably  expected to materially
diminish  the  commercial   value  of  the  BCG  Material,   or  to  affect  the
patentability  of the BCG  Material  or any  improvements  thereof.  The parties
further acknowledge that the Clinical Trials are multi-centre studies. Recipient
undertakes and shall ensure that the data and results  arising from the Clinical
Trials shall not be published or  presented by  Recipient,  by the  coordinating
investigators or by other participating individuals or entities, until such time
as the  Clinical  Trials are  completed  and the data and results  are  analyzed
thereafter.  Upon  completion of the SILVA Trial,  Recipient shall ensure that a
cooperative   clinical   administrative   body,   comprising  the   coordinating
investigators,  shall prepare a report which will include a statistical analysis
and an appraisal of the final data and results from a medical viewpoint. Interim
publication  or   presentation   of  the  Clinical  Trials  would  include  only
demographic  data,  for  publicity  purposes.   Any  publication,   abstract  or
presentation,  whether verbal or written,  of such data,  results or report,  or
excerpts or interpretations  thereof, shall be submitted by Recipient to PMC for
review, pursuant to the following conditions:

                  (i)   Recipient   shall  ensure  that  any   article,   paper,
manuscript,  report,  data,  results,  abstract,  poster  or notes  shall not be
published  or  presented  until  the  completion  of the  SILVA  Trial and after
analysis of the final results of the SILVA Trial;

*** Confidential Treatment Requested

<PAGE>
                                      -9-


                  (ii)  Recipient  shall  ensure  that any such  publication  or
presentation  acknowledges  the contribution of the parties and their employees,
representatives or consultants as co-authors or as otherwise appropriate; and

                  (iii) Recipient shall ensure that the publishing party deliver
to PMC,  at  least  sixty  (60)  days in  advance  of any  such  publication  or
presentation,  any article, paper, manuscript,  report, data, results, abstract,
poster or notes  proposed to be published or presented,  in order to permit PMC,
acting reasonably:

                        (A)   to apply for patents or make such other filings or
                  registrations as deemed advisable,

                        (B)   to object to any part of such proposed publication
                  or  presentation  on the  basis  that it  would be  reasonably
                  expected  to  materially  diminish   the  value  of  the   BCG
                  Material and information  related thereto,

                        (C)   to require that any  Confidential  Information  be
                  deleted from any  such proposed  publication  or presentation,
                  or

                        (D)   to   revise   such   proposed    publication    or
                  presentation accordingly.

Recipient  undertakes and shall ensure that similar publication and presentation
procedures will be established for any Additional Clinical Trials.

         5(d).    Use of Names or Trademarks

                  The parties shall not  originate any press release  concerning
the entering into of this  Agreement or the subject  matter  hereof  without the
prior  written  approval  of the  other  parties,  which  approval  shall not be
unreasonably  withheld.  The parties shall not have the right to use the name or
any trade name or trademark of the other parties without prior written approval.
Reference to the existence of this  Agreement may be made in the regular  course
of business of the parties in informational  disclosures describing the business
of the parties, upon prior written notice to the other parties.

6.       Warranties and Representations

         6(a). Warranties and Representations of PMC.

                  Subject to Section 7(a),  PMC  represents  and warrants to the
Recipient that:

                  (i) PMC is a corporation duly organized,  validly existing and
in good standing and has all necessary corporate power to enter into and perform
its obligations under this Agreement;

                  (ii) the execution, delivery and performance of this Agreement
by PMC have been duly authorized and approved by all necessary corporate action,
and the Agreement is binding

*** Confidential Treatment Requested

<PAGE>
                                      -10-


upon and  enforceable  against  PMC in  accordance  with its terms  (subject  to
bankruptcy and similar laws affecting the rights of creditors generally);

                  (iii) each lot of the BCG Material  delivered to the Recipient
for the Clinical Trials shall be manufactured, tested and released in compliance
with cGMP and the applicable Manufacturing Regulatory Documentation; and

                  (iv)  any  documentation  provided  to  the  Recipient  by PMC
concerning the BCG Material or Manufacturing  Regulatory  Documentation shall be
accurate to the best of PMC's knowledge and ability.

         6(b).    Warranties and Representations of the Recipient

                  Recipient  and  each  of  ImClone  and  Merck  represents  and
warrants to PMC that:

                  (i) Recipient consist of corporations duly organized,  validly
existing and in good  standing and have all necessary  corporate  power to enter
into and perform their obligations under this Agreement;

                  (ii) the execution, delivery and performance of this Agreement
by the  Recipient  have been  duly  authorized  and  approved  by all  necessary
corporate action, and the Agreement is binding upon and enforceable  against the
Recipient in accordance  with its terms  (subject to bankruptcy and similar laws
affecting the rights of creditors generally);

                  (iii)  Recipient shall use BCG Material in compliance with all
applicable  laws and  regulations  and  shall  conduct  the  Clinical  Trials in
compliance with cGMP and cGCP;

                  (iv) Recipient is not aware of any special or unusual  hazards
that would arise as a result of the combination of BEC2 and BCG Material for the
Clinical Trials to be conducted by Recipient;

                  (v)  each  lot of  BEC2  for  the  Clinical  Trials  shall  be
manufactured,  tested and released in  compliance  with cGMP and the  applicable
Regulatory Filings; provided that, in connection with such release only, each of
ImClone and Merck provides such warranty and representation  with respect to the
territories in which they  respectively  are  responsible for the conduct of the
Clinical Trials;

                  (vi) any documentation concerning the Clinical Trials, BEC2 or
Regulatory  Filings shall be accurate to the best of  Recipient's  knowledge and
ability; and

                  (vii) Recipient does not guarantee any particular results from
the conduct of the Clinical Trials.

*** Confidential Treatment Requested

<PAGE>
                                      -11-


7.       Limitation of Liability; Indemnification

         7(a).    Limitation of Liability

                  PMC has limited  knowledge or awareness of, and has no control
over,  the manner in which the Recipient  intends to use the BCG  Material.  PMC
shall not be liable for any  losses,  damages,  costs or  expenses of any nature
incurred or suffered by the  Recipient or by a third  party,  arising out of any
dispute or other claims or proceedings (including,  without limitation,  product
liability  claims  and  claims by a third  party  alleging  infringement  of its
intellectual  property  rights  by the  use or sale  of BCG  Material),  made or
brought as a result of the Clinical  Trials or against the Recipient,  nor shall
PMC be  responsible  in any way for dealing  with any such  disputes,  claims or
proceedings,  except to the extent that any such  dispute,  claim or  proceeding
arises  from (a) a breach  by PMC of any  warranty  set  forth in  Section  6(a)
hereof, or (b) any failure by PMC to manufacture,  test, document or release the
BCG Material in compliance with cGMP and the applicable Manufacturing Regulatory
Documentation.  PMC shall not be responsible for any interruption in supply that
is caused by Force  Majeure.  EXCEPT AS SET FORTH IN SECTION  6(a)  HEREOF,  PMC
MAKES NO  WARRANTIES,  EXPRESS OR IMPLIED,  WRITTEN OR ORAL,  INCLUDING  WITHOUT
LIMITATION  ANY  WARRANTIES  OF  MERCHANTABILITY,  OF FITNESS  FOR A  PARTICULAR
PURPOSE OR OF NON-INFRINGEMENT  OF THIRD PARTY PATENTS.  PMC SHALL NOT BE LIABLE
FOR ANY LOSS, CLAIM, DAMAGE, EXPENSE OR LIABILITY,  OF ANY KIND OR NATURE, WHICH
MAY ARISE FROM OR IN CONNECTION  WITH THIS AGREEMENT OR WITH THE CLINICAL TRIALS
OR FROM THE USE,  HANDLING OR STORAGE OF BCG MATERIAL,  BEC2 OR THEIR  ANCILLARY
MATERIALS BY RECIPIENT OR BY ANY  AFFILIATES,  EMPLOYEES,  AGENTS,  CONTRACTORS,
INVESTIGATORS OR REPRESENTATIVES OF RECIPIENT.  NO PARTY TO THIS AGREEMENT SHALL
BE  ENTITLED  TO  RECOVER  FROM  THE  OTHER  PARTIES  ANY  SPECIAL,  INCIDENTAL,
CONSEQUENTIAL OR PUNITIVE DAMAGES.

         7(b).    Recipient's Right to Indemnification

                  PMC  hereby  agrees to  indemnify,  defend  and hold  harmless
Recipient and its affiliates, officers, directors, employees and representatives
(collectively,  the "Recipient's Indemnitees") from and against any liabilities,
claims,  damages,  costs,  expense (including  reasonable  attorneys' fees), and
actions  (collectively,  "Claims")  arising  out of or  resulting  from  (i) the
failure by PMC to  manufacture,  test,  document or release the BCG  Material in
compliance with cGMP and the applicable  Manufacturing  Regulatory Documentation
or (ii) the  breach by PMC or PMC's  Indemnitees  of any of its  obligations  or
warranties  hereunder,  except to the extent that any such Claims  arise out of,
are based upon or result  from the gross  negligence  or willful  misconduct  of
Recipient or  Recipient's  Indemnitees  or a breach by Recipient or  Recipient's
Indemnitees of any of Recipient's obligations or warranties under this Agreement
or under the Clinical  Trial  Protocol or Regulatory  Filings.  Recipient  shall
promptly notify PMC of any Claims,  upon becoming aware thereof,  and permit PMC
at PMC's cost to defend against such Claims and shall  cooperate with PMC in the
defense  thereof.  Recipient shall not enter into, or permit,  any settlement of
any such Claims without the express written consent of PMC.

*** Confidential Treatment Requested

<PAGE>
                                      -12-


Recipient  may, at its option and expense,  have its own counsel  participate in
any proceeding that is under the direction of PMC and will cooperate with PMC or
its insurer in the disposition of any such matter.

         7(c).    PMC's Right to Indemnification

                  Recipient hereby agrees to indemnify, defend and hold harmless
PMC and its  affiliates,  officers,  directors,  employees  and  representatives
(collectively,  "PMC's  Indemnitees") from and against any liabilities,  claims,
damages,  costs,  expense  (including  reasonable  attorneys' fees), and actions
(collectively,  "Claims")  arising  out of or  resulting  from (i) the  Clinical
Trials, (ii) the failure by Recipient to manufacture,  test, document or release
BEC2 in compliance with cGMP and the applicable  Regulatory  Filings,  (iii) the
breach by Recipient or Recipient's Indemnitees of any of Recipient's obligations
or  warranties  under this  Agreement  or under the Clinical  Trial  Protocol or
Regulatory  Filings,  (iv)  the  possession,   processing,   shipment,  storage,
handling,  administration  or disposal of any BCG Material supplied to Recipient
hereunder,  or  (v)  the  possession,   manufacture,  sale,  use,  distribution,
processing,  shipment, storage, handling,  administration or disposal of BEC2 by
Recipient  whether or not any BCG  Material is combined  thereto,  except to the
extent  that any such  Claims  arise out of, are based  upon or result  from the
gross negligence or willful  misconduct of PMC or PMC's  Indemnitees or a breach
by PMC or PMC's Indemnitees of any of PMC's obligations or warranties under this
Agreement.  PMC shall  promptly  notify  Recipient of any Claims,  upon becoming
aware thereof,  and permit Recipient at Recipient 's cost to defend against such
Claims and shall cooperate with Recipient in the defense thereof.  PMC shall not
enter into, or permit,  any  settlement  of any such Claims  without the express
written consent of Recipient.  PMC may, at its option and expense,  have its own
counsel  participate in any proceeding  that is under the direction of Recipient
and will cooperate with Recipient or its insurer in the  disposition of any such
matter.

         7(d).    Recipient's Insurance

                  Each of ImClone and Merck shall obtain and  maintain  separate
product liability  insurance and clinical trial liability  insurance (naming PMC
either as an  additional  insured  or policy  beneficiary),  with an  acceptable
insurer,  in the minimum amount of US$10,000,000 per occurrence.  Such insurance
may not be cancelled or  terminated  except upon thirty (30) days' prior written
notice to PMC. Such insurance  shall be obtained and maintained at the sole cost
and  expense of ImClone  and Merck.  From time to time,  at the  request of PMC,
ImClone and Merck will cause  certificates  of such  insurance to be provided to
PMC evidencing compliance with their respective obligations set forth herein.

*** Confidential Treatment Requested

<PAGE>
                                      -13-


8.       Term and Termination

         8(a).    Expiration

                  This Agreement  shall commence on the Effective Date and shall
terminate  six (6) months  after the  expiration  of the Supply  Period,  unless
earlier  terminated  as  provided  in  Sections  8(b),  (c) and (d) hereof  (the
"Term").

         8(b).    Termination by Any Party

                  Any party shall have the right to  terminate  this  Agreement,
immediately upon written notice of termination to the other parties in the event
that:

                  (i) a party fails to perform or observe or otherwise  breaches
any of its material  obligations under this Agreement and such failure or breach
continues  unremedied  for a period of sixty  (60)  days  after  receipt  by the
breaching party of a written notice thereof from the non-breaching party; and

                  (ii) a  proceeding  or case  shall be  commenced  without  the
application  or consent  of the other  party and such  proceeding  or case shall
continue undismissed,  or an order, judgment or decree approving or ordering any
of the  following  shall be entered and continue  unstayed and in effect,  for a
period of  forty-five  (45) days from and after the date  service  of process is
effected  upon the  other  party,  seeking  (A) the other  party's  liquidation,
reorganization, dissolution or winding-up, or the composition or readjustment of
its debts, (B) the appointment of a trustee, receiver, custodian, liquidation or
the  like of the  other  party  or of all or any  substantial  portion  of their
assets,  or (C)  similar  relief in  respect  of the other  party  under any law
relating  to   bankruptcy,   insolvency,   reorganization,   winding-up  or  the
composition or readjustment of debts.

         8(c).    Termination due to Cessation of Clinical Trials

                  In the  event  Recipient  in its sole  discretion  ceases  the
Clinical Trials,  and so advises PMC in writing in advance,  either Recipient or
PMC may terminate  this  Agreement upon thirty (30) days prior written notice to
the other parties.

         8(d).    Termination in Connection With Further Negotiation

                  This  Agreement  may be  terminated by the Recipient or PMC in
connection with the failure, during the Term, to enter into a separate agreement
for future  commercial  supply of BCG Material,  as further set forth in Section
2(e) hereof.

         8(e).    Effects of Termination

                  In the event of any termination of this Agreement, all amounts
previously  invoiced  and  unpaid  or owed to PMC  shall be due and  payable  by
Recipient on the date of  termination.  Following  termination of the Agreement,
the Recipient shall return to PMC or

*** Confidential Treatment Requested

<PAGE>
                                      -14-


destroy,  at PMC's option,  any  quantities  of BCG Material.  The parties agree
that: (i) the provisions of Section 2(e),  Article 3 and Article 6 shall survive
the termination or expiration of this Agreement;  (ii) the provisions of Article
5 hereof shall survive the  termination  or expiration of this Agreement for the
term  specified in that  Article;  and (iii) the  provisions of Article 7 hereof
shall survive  termination  or expiration of this Agreement only with respect to
Claims that arose from acts or circumstances that occurred prior to termination.

9.       Miscellaneous

         9(a).    No Implied Waivers; Rights Cumulative

                  No failure on the part of PMC or the  Recipient  to  exercise,
and no delay in exercising,  any right,  power,  remedy or privilege  under this
Agreement,  or  provided  by  statute  or at  law  or in  equity  or  otherwise,
including,  without limitation,  the right or power to terminate this Agreement,
shall impair,  prejudice or constitute a waiver of any such right, power, remedy
or privilege  or be construed as a waiver of any breach of this  Agreement or as
an acquiescence  therein,  nor shall any single or partial  exercise of any such
right, power, remedy or privilege preclude any other or further exercise thereof
or the exercise of any other right, power, remedy or privilege.

         9(b).    Notices

                  All notices,  requests and other  communications to PMC or the
Recipient   hereunder  shall  be  in  writing  (including  telecopy  or  similar
electronic  transmissions) and shall be personally delivered or sent by telecopy
(fax) or other  electronic  facsimile  transmission  or by  registered  mail, or
certified mail, return receipt requested,  postage prepaid,  or by other form of
courier requiring receipt in each case to the respective address specified below
(or to such address as may be  specified  in writing to the other party  hereto)
and shall be effective upon receipt thereof:

Connaught Laboratories Limited
1755 Steeles Avenue West
Toronto, Ontario, CANADA
M2R 3T4

Attn:    Vice President and General Counsel
         Facsimile:        (416) 667-2860
with a copy to:   Senior Vice President, and General Manager,
                    Oncology Business Unit
         Facsimile:        (416) 667-2990

*** Confidential Treatment Requested

<PAGE>
                                      -15-


Merck KGaA
Frankfurter Strasse 250
64271 Darmstadt, GERMANY

Attn:    Dr. Dieter Orth, License Department
         Facsimile:        61 51 72 3378
with a copies to: Dr. Jurgen Uhl, Project Manager, Facsimile: 61 51 72 7580, and
                           Lothar Finke, TATONZ, Facsimile: 61 51 72 6905

ImClone Systems Incorporated
180 Varick Street
New York   NY 10014
U.S.A.

Attn:    General Counsel
         Facsimile:        (212) 645-2054

         9(c).    Successors and Assigns

                  The terms and provisions of this Agreement  shall inure to the
benefit  of, and be binding  upon,  PMC,  the  Recipient,  and their  respective
successors and permitted assigns as provided in this Section.  PMC and Recipient
shall  have the right to assign or  otherwise  transfer  any of its  rights  and
interests,  or delegate  any of its  obligations,  to an Affiliate of such party
provided  that  such  Affiliate  agrees  in  writing  to  carry  out in full any
obligations  that are assigned to it. PMC and Recipient  shall have the right to
assign all of its rights and interests and delegate all of its obligations under
this  Agreement to any entity that is the successor in interest to the assigning
party in any merger,  consolidation or sale involving  substantially  all of the
business and assets of the assigning  party.  Any other assignment or delegation
shall only be valid and  effective  if the other  parties  have  provided  their
respective prior express written consent.  Any attempt to assign or delegate any
portion of this  Agreement in violation of this Section  shall be null and void.
Subject to the foregoing,  any reference to PMC or the Recipient hereunder shall
be deemed to include the successors thereto and permitted assigns thereof.

         9(d).    Force Majeure

                  No party shall be liable to the others, or be in default under
the  terms  of this  Agreement,  for its  failure  to  fulfill  its  obligations
hereunder to the extent such  failure  arises for any reason or cause beyond its
control including,  without limitation,  strikes, lockouts, labor disputes, acts
of God, acts of nature,  acts of governments  or their  agencies,  fire,  flood,
storm, power shortages or power failure, war, sabotage,  inability to supply and
to obtain labor,  raw materials,  supplies,  fuel or utilities,  or inability to
obtain transportation,  or any other circumstance or event beyond the reasonable
control of the party (each, "Force Majeure"), provided that the party relying on
the  provisions  of this Section 9(d) shall give notice to the other  parties of
its inability to observe or perform the  provisions of this  Agreement.  A party
shall notify the other  parties if, at any time,  it  encounters a production or
manufacturing problem

*** Confidential Treatment Requested

<PAGE>
                                      -16-


which in its reasonable opinion could reasonably be expected to adversely affect
its ability to supply BEC2 or BCG  Material,  as  applicable,  for the  Clinical
Trials. Should such production or manufacturing be so reduced, the party relying
on these provisions shall have the right to allocate such supply for its own use
and among its affiliates, customers and distributors, in such manner and on such
basis as it may reasonably  determine,  without  compensation  or penalty to the
other parties.

         9(e).    Governing Law

         This  Agreement  shall  be  governed  by the  laws of the  Province  of
Ontario. The parties specifically agree that the International Sale of Goods Act
does not apply hereto.

         9(f).    Entire Agreement

                  This  Agreement,  together  with  its  Exhibits  A,  B and  C,
constitutes, on and as of the Effective Date hereof, the entire agreement of and
among PMC, ImClone and Merck with respect to the subject matter hereof,  and all
prior or contemporaneous  understandings or agreements, whether written or oral,
between or among PMC,  ImClone or Merck with respect to such subject  matter are
hereby superseded, as of the Effective Date.

         9(g)     Relationship

                  Each of the parties is an independent contractor. No party is,
and  nothing  in this  Agreement  shall  constitute  any party as the  employer,
employee,  principal,  agent or partner of, or joint  venturer  with,  any other
party. No party has authority to enter into any agreement on behalf of the other
parties or to bind the other parties in any other manner, and no party shall act
or omit to act so as to suggest that it has such authority. No party shall incur
any  obligations  or  liabilities,  express  or  implied,  by reason of, or with
respect to, the actions or omissions of the other parties or of persons for whom
they are responsible.

         9(h)     Counterparts

                  This  Agreement  may be executed in two or more  counterparts,
each of which  shall be  deemed  an  original  but all of which  together  shall
constitute one and the same instrument.

*** Confidential Treatment Requested

<PAGE>
                                      -17-


         IN WITNESS  WHEREOF,  the  parties  have caused  this  Agreement  to be
executed by their duly authorized officers as of the Effective Date.

ImClone Systems Incorporated


By: /s/ John B. Landes
    --------------------------
Name:    John B. Landes
Title: VP Business Development
        and General Counsel


Merck KGaA


By: /s/  Professor Schurr  18/8/98
    ------------------------------
Name:    Professor Schurr
Title:   Vice President Clin. R&D


By:      /s/ Dr. Dieter Orth
         ---------------------------
Name:    Dr. Dieter Orth
Title:   Head of Corporate Licensing


Connaught Laboratories Limited

By:      /s/ Dr. Pierre Meulien
         ----------------------
Name:    Dr. Pierre Meulien
Title:   Vice President
Research & Development


By:      /s/ Wm. M.M. Thoms
         -------------------
Name:    Wm. M. Thoms
Title:   VP & General Counsel

*** Confidential Treatment Requested

<PAGE>
                                      -18-


                Exhibit "A" (Protocols, Investigators' Brochures)
   to Agreement among PMC, ImClone and Merck effective as of January 1, 1997

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



[ *** ]

*** Confidential Treatment Requested

<PAGE>
                                      -19-


          Exhibit "B" (Section 2(a), ImClone's labelling requirements)
    to Agreement among PMC, ImClone and Merck effective as of January 1, 1997

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


                            BCG (lyophilized) 1.5 mg
                          (An Active Immunizing Agent)
                        For Intracutaneous Injection Only
                          Dose as per Clinical Protocol
                                      Lot:

                                      Exp:

                          For Investigational Use Only

                    MUST NOT BE ADMINSTERED AS A SINGLE AGENT

                       Mfg: Connaught Laboratories Limited
                             North York, ONT Canada

*** Confidential Treatment Requested

<PAGE>
                                      -20-


           Exhibit "C" (Section 2(a), Merck's labelling requirements)
    to Agreement among PMC, ImClone and Merck effective as of January 1, 1997

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


                            BCG (lyophilized) 1.5 mg
                          (An Active Immunizing Agent)
                        For Intracutaneous Injection Only
                Use according to study protocol EORTC 08971 only

                                                                     Lot:
                                                                     Exp:

                           For Clinical Trial Use Only

                    MUST NOT BE ADMINSTERED AS A SINGLE AGENT

                       Mfg: Connaught Laboratories Limited
                             North York, ONT Canada

*** Confidential Treatment Requested



                                                                   Exhibit 10.73

                                                CONFIDENTIAL TREATMENT REQUESTED
                                                                April 30th, 1999

                                Table of Contents

1.       Definitions
1.1      BI PHARMA KG
1.2      BI PHARMA KG Confidential Information
1.3      Cell Line
1.4      Certificate of Analysis
1.5      cGMP
1.6      C225
1.7      Effective Date
1.8      IMCLONE
1.9      IMCLONE Confidential Information
1.10     Master Cell Bank (MCB)
1.11     Manufacturer's Working Cell Bank (MWCB)
1.12     Phase I
1.13     Phase II
1.14     Phase III
1.15     Process
1.16     Product
1.17     Project
1.18     Project Fee
1.19     Project Manager
1.20     Project Team
1.21     Specifications
1.22     Start Date


2.       Cooperation between the Parties in the Course of the Project
2.1      Designation of Project Manager
2.2      Project Team
2.3      Cooperation
2.4      Access to facilities


3.       IMCLONE's Tasks and Responsibilities
3.1      License to Use of IMCLONE Cell Line and Intellectual  Property
3.2      Materials and Information to be Provided
3.3      Activities to be Performed

December 28, 1998

*** Confidential Treatment Requested


<PAGE>

Contract Research and Development  Agreement Bl Pharma KG/ImClone,  IMCL 13r.doc
                                                                         Page: 2

4.       BI PHARMA KG's Tasks and Responsibilities
4.1      BI PHARMA KG's Tasks
4.2      Control of Cell Line
4.3      Quarantine and Testing
4.4      Phase I/II Development Program
4.5      Responsibility for Failed Fermentations and Downstream Operations
4.6      Materials and Information to be Delivered
4.7      Product to be Delivered
4.8      Prior Approval
4.9      Retention Samples
4.10     Additional Work


5.       Phase I/II to be Conducted on Fixed-Fee Basis


6.       Phase I/II Project Fee


7.       Additional Work / Future Activities
7.1      Additional Work
7.2      Future Activities
7.3      Others


8.       Ownership of Project Data
8.1      General
8.2      Intellectual Property Rights solely covering the Product
8.3      All other Intellectual Property Rights


9.       Representations. Warranties and Indemnification
9.1      IMCLONE
9.2      BI PHARMA KG


10.      Limitation of Liability
10.1     No Warranty of Merchantability of Fitness
10.2     Limitation of Liability
10.3     Maximum Amount

*** Confidential Treatment Requested


<PAGE>

Contract Research and Development  Agreement Bl Pharma KG/ImClone,  IMCL 13r.doc
                                                                         Page: 3

11.      Confidentiality
11.1     BI PHARMA KG
11.2     IMCLONE
11.3     Exceptions
11.4     Others


12.      Term and Termination
12.1     Term
12.2     Right to Terminate
12.3     Effect of Termination


13.      Miscellaneous
13.1     Force Majeure
13.2     Publicity
13.3     Notices
13.4     Applicable Law
13.5     Compliance with Laws
13.6     Independent Contractors
13.7     Waiver
13.8     Severability
13.9     Entirety
13.10    Assignment

*** Confidential Treatment Requested


<PAGE>

Contract Research and Development  Agreement Bl Pharma KG/ImClone,  IMCL 13r.doc
                                                                         Page: 4

                   CONTRACT RESEARCH AND DEVELOPMENT AGREEMENT
                                     (C225)


THIS CONTRACT  RESEARCH AND DEVELOPMENT  AGREEMENT  ("Agreement")  is made as of
April 30, 1999 by and among ImClone Systems  Incorporated,  ("IMCLONE"),  having
its principal  business offices at 180 Varick Street,  New York, New York 10014,
U.S.A. and Boehringer  Ingelheim Pharma KG ("BI PHARMA KG") a German corporation
having  its  principal  place  of  business at  Birkendorfer  Strasse  65, 88397
Biberach an der Riss, Federal Republic of Germany.


BACKGROUND

IMCLONE is the  proprietor  of a  hybridoma  cell line [ *** ] which  produces a
monoclonal  antibody  C225 directed  against  Epidermal  Growth Factor  Receptor
(EGFR) as a result of stable transfection with a C225 expression  construct,  as
well as methods for the purification and analysis of C225.

BI PHARMA KG owns specialized cell culture, processing, protein purification and
Iyophilization  facilities  that may be suitable  for  production  of C225,  and
employs  personnel who have experience in production of proteins by cell culture
and purification processes as well as in registration of biopharmaceuticals.

IMCLONE desires to have BI PHARMA KG personnel evaluate, further develop, supply
and scale-up the production process for C225 in BI PHARMA KG's facilities.

IMCLONE  and Dr.  Karl  Thomae  GmbH  (as of  01.01.1998  and in this  Agreement
substituted  by BI Pharma  KG as the  contractual  assignee  of all  rights  and
obligations  thereunder)  have  previously  entered  into  a  Material  Transfer
Agreement  for  Evaluation  dated  November  10/24,  1997 to evaluate  potential
production and supply of C225.

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AGREEMENT

IN CONSIDERATION OF the mutual covenants set forth in this Agreement,  BI PHARMA
KG and IMCLONE hereby agree as follows:

1.       Definitions

1.1      "BI PHARMA KG"
         shall mean Boehringer Ingelheim Pharma KG.

1.2      "BI PHARMA KG Confidential Information"
         shall mean all  technical and other  information  relating to BI PHARMA
         KG's  facilities  and  associated  technologies  that is  disclosed  or
         supplied  to,  IMCLONE  by BI PHARMA KG  (except  IMCLONE  Confidential
         Information)   pursuant  to  this   Agreement,   whether   patented  or
         unpatented,  including,  without limitation,  trade secrets,  know-how,
         processes, concepts,  experimental methods and results and business and
         scientific plans.

1.3      "Cell Line"
         shall mean the IMCLONE cell line [ *** ] that expresses the Product.

1.4      "Certificate of Analysis"
         shall mean a document to be established by mutual agreement  describing
         testing methods and results.

1.5      "cGMP"
         shall mean the regulatory  requirements for current good  manufacturing
         practices  promulgated  by the FDA under  the  Federal  Food,  Drug and
         Cosmetic Act, as amended,  21 C.F.R.  ss. 210 et seq and 21 C.F.R.  ss.
         600-610, as applicable.

1.6      "C225"
         shall mean a  chimerized  monoclonal  antibody  directed  against  EGFR
         produced by the Cell Line.

1.7      "Effective Date"
         shall mean the date first above  written,  which shall be the effective
         date of this Agreement.

1.8      "IMCLONE"
         shall mean  ImClone  Systems  Incorporated  or an  affiliate of ImClone
         Systems Incorporated.

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1.9      "IMCLONE Confidential Information"
         shall  mean  the  Cell  Line,  Process,   Product  and  all  technical,
         scientific  or business and other  materials and  information  that are
         disclosed or supplied to BI PHARMA KG by IMCLONE or developed on behalf
         of  IMCLONE  by BI PHARMA  KG  (excluding  BI  PHARMA  KG  Confidential
         Information) pursuant to this Agreement whether patented or unpatented,
         including,  without  limitation,  trade secrets,  know-how,  processes,
         concepts,  experimental methods and results and business and scientific
         plans.

1.10     "Master Cell Bank (MCB)"
         shall  mean a cell bank  established  by BI PHARMA  KG  derived  from a
         suspension serum-free adapted cell line to be produced at BI PHARMA KG.

1.11     "Manufacturer's Working Cell Bank (MWCB)"
         shall mean a cell bank  established  by BI PHARMA KG  derived  from the
         MCB.

1.12     "Phase I"
         shall refer to process transfer of the Process to a [ *** ] scale at BI
         PHARMA  KG,  continued  scale-up  to a [  ***  ]  and  [  ***  ]  pilot
         fermentation  scale  and  establishment  of a  downstream  purification
         process  according to Appendix 1, all of which has been completed as of
         the Effective Date.

1.13     "Phase II"
         shall  refer to  demonstrating  the  process  at  small  scale [ *** ],
         performing  Product  equivalency  testing  and  establishing  a filling
         process of the corresponding Product as well as the scale-up to [ *** ]
         pilot  scale and cGMP  production  of clinical  grade  material at that
         scale to be undertaken  by BI PHARMA KG pursuant to this  Agreement and
         according  to the  updated  Master  Projectplan  (Appendix  1.1)  dated
         November  1998.  The  agreed  upon  process  format for Phase II of the
         project is given in Appendix 6. [ *** ].

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1.14     "Phase III"
         shall refer to a second  project,  which may be implemented by separate
         agreement  between  IMCLONE and BI PHARMA KG  following  completion  of
         Phase II  activities,  involving  scaling the Process  from the [ *** ]
         fermentation scale implemented in Phase II to the [ *** ].

1.15     "Process"
         shall refer to a proprietary  IMCLONE  process for using the Cell Line,
         including defined  procedures,  equipment and analytical  methodologies
         for in-process control,  release testing and Product  characterization,
         that has been used by IMCLONE to produce the Product at the  laboratory
         scale, which shall be disclosed by IMCLONE to BI PHARMA KG to enable BI
         PHARMA KG to carry out the  Project  or,  if and when  applicable,  the
         modified process after further development and scale up by BI PHARMA KG
         to the [ *** ] fermentation scale.

1.16     "Product"
         shall mean the  biologically  active C225  produced by the Cell Line in
         accordance with the Process.

1.17     "Project"
         shall mean the Phase I and Phase II contract research program described
         herein,  in which IMCLONE shall transfer the Process to BI PHARMA KG to
         be  implemented,  scaled-up and  evaluated at the [ *** ]  fermentation
         scale in and by BI PHARMA  KG's  facility  and  equipment.  The primary
         objectives  of the Project will be to transfer,  establish and scale up
         the Process in the BI PHARMA KG facility, successfully demonstrate that
         Product can be  reproducibly  manufactured in BI PHARMA KG's facilities
         at [ *** ] scale,  and  generate a report  compiling  a summary of data
         generated in the Project. The proposed workscopes and timelines for the
         Project  are laid down in the Master  Projectplans  attached  hereto as
         Appendix 1 and Appendix 1.1.  Phase I has been completed as of the date
         of this Agreement.

1.18     "Project Fee"
         shall have the meaning specified in Section 6 hereof.

1.19     "Project Manager"
         shall have the meaning specified in Section 2.1 hereof.

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1.20     "Project Team"
         shall have the meaning specified in Section 2.2 hereof.

1.21     "Specifications"
         shall mean the  specifications  for the Product and the respective test
         methods   attached   hereto  as   Appendix   5  on  the  basis  of  the
         specifications  provided by IMCLONE and as such  specifications  may be
         amended from time to time by mutual  agreement of IMCLONE and BI PHARMA
         KG according to further development of the Process and Product.

1.22     "Start Date"
         shall  mean  February  1, 1998  (according  to the  Master  Projectplan
         Appendix 1).

2.       Cooperation between the Parties in the Course of the Project

2.1      Designation of Project Manager.
         BI PHARMA KG and IMCLONE shall each identify a Project Manager,  and if
         they choose, the supervisor of the Project Manager. The Project Manager
         or the Project Manager's supervisor will be exclusively responsible for
         communicating  all instructions and information  concerning the Project
         to the  other  party  and  shall be the  person  or people to whom such
         instructions and information are communicated by the other party.  Each
         Project Manager or the Project  Manager's  supervisor will be available
         on a weekly  basis for  consultation  at  prearranged  times during the
         course of the Project or as may  otherwise  be  reasonably  required or
         advisable.  In  the  absence  of the  Project  Manager  or the  Project
         Manager's supervisor, a substitute shall be appointed. Additional modes
         or methods of communication and decision making may be implemented with
         the mutual consent of each party.

2.2      Project Team.
         BI PHARMA KG and IMCLONE shall each name  representatives  to a Project
         Team, which shall consist of  knowledgeable  specialists in appropriate
         disciplines  who shall be  responsible  for planning and  executing the
         Project and any subsequent interactions between the parties. At regular
         intervals,  the Project  Managers shall schedule  meetings between each
         company's  representatives  for the  purpose of  communicating  Project
         updates and providing a forum for strategic  decision  making and rapid
         resolution of issues.

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         Joint  Project  meetings  shall be conducted  by  telephone-conference,
         video-conference  and face to face meetings.  Meeting  minutes shall be
         prepared jointly by the Project Managers to record all issues discussed
         and decisions  made,  subject to final approval of such minutes by both
         parties.  Such  minutes are  considered  to be accepted by a party when
         there is no objection made by such a party within a period of 7 (seven)
         days after such minutes have been received by the respective party.

         The present list of the members of the Project Team is attached  hereto
         as Appendix 2.

2.3      Cooperation.
         BI PHARMA KG and IMCLONE each agree to work together collaboratively on
         the Project as reasonably expeditiously as possible, with the objective
         of completing the Project according to the mutual agreed timelines (see
         Appendix 1 and Appendix 1.1).

         In the course of the Project,  BI PHARMA KG will at all times take into
         consideration and implement the  recommendations  of IMCLONE as long as
         they do not negatively  influence other BI PHARMA KG biotech operations
         and are agreed  upon by the  Project  Team.  In the absence of explicit
         instructions from IMCLONE, BI PHARMA KG shall be entitled to employ its
         reasonable  judgment in carrying out the Project. BI PHARMA KG shall be
         entitled to rely upon any  instructions  or directives  provided by the
         IMCLONE  Project Manager or the IMCLONE  Project  Manager's  supervisor
         and, subject to Sections 4.5 and 4.7 below shall not be responsible for
         failure to achieve  any  objective  or the  inability  to adhere to any
         guideline   due  to  technical   failures,   incomplete   direction  or
         documentation of Process variables,  or other causes beyond the control
         of BI PHARMA KG.

2.4      Access to facilities.
         IMCLONE shall permit  personnel of BI PHARMA KG, upon reasonable  prior
         written notice to IMCLONE,  to visit its facilities during  appropriate
         times to observe the Process and certain analytical procedures for C225
         as  conducted  by  IMCLONE.  BI PHARMA KG shall  permit  IMCLONE,  upon
         reasonable prior notice to BI PHARMA KG, to review the originals of all
         batch records and other primary  documents at its  facilities and shall
         allow IMCLONE  personnel to be present in its facilities at appropriate
         times  (e.g.  to observe  the  implementation  of the  Process).  While
         visiting the facility of the other party, personnel of BI PHARMA KG and
         IMCLONE  shall  comply  with  all  security  and  safety  policies  and
         procedures of the other party.

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3.       IMCLONE's Tasks and Responsibilities

3.1      License to Use of IMCLONE Cell Line and Intellectual Property.
         IMCLONE  hereby grants to BI PHARMA KG a limited,  non-exclusive  right
         and  license,   without  the  right  to  sublicense,   to  use  IMCLONE
         Confidential  Information,  including  but not limited to the Cell Line
         and  Process,  solely for the purpose of enabling BI PHARMA KG to carry
         out its tasks and responsibilities under this Agreement with respect to
         the Project.

3.2      Materials and Information to be Provided.
         To enable BI PHARMA KG to begin the Project, IMCLONE shall provide:

         (a)  10 vials of the MCB  and/or  MWCB for  Project  start,  additional
              quantities may be requested.

         (b)  a  description  of IMCLONE's  methods for testing of the Cell Line
              and its progenitor cell line.

         (c)  documentation  describing the exact composition of the [ *** ] and
              a sufficient  quantity of actual  medium to enable BI PHARMA KG to
              begin to culture the Cell Line upon receipt from IMCLONE;

         (d)  a description  of the Cell Line and of genetic  construct used for
              expression  of the Product (for  registration  according to German
              gene technology law ("Gentechnikgesetz")), and

         (e)  at BI PHARMA KG's  reasonable  request any additional  information
              concerning  the  Process,   analytical  test  methods,   reference
              materials, and any critical reagents to facilitate the Project.

3.3      Activities  to be  Performed.  As the Project is carried  out,  IMCLONE
         shall:

         (a)  use reasonable  efforts to perform the work and tasks as set forth
              and detailed in Appendix 3.

         (b)  at BI PHARMA  KG's  request  and  subject  to  Section  2.4 above,
              arrange for BI PHARMA KG personnel to visit  IMCLONE's  production
              facility  to  observe  and record  the  Process as carried  out by
              IMCLONE in its  facility.  Any such  records  shall be  considered
              IMCLONE Confidential Information.

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4.       BI PHARMA KG's Tasks and Responsibilities

4.1      BI PHARMA KG's Tasks.
         In the course of this Agreement BI PHARMA KG shall perform the work and
         tasks as laid down and detailed in Appendix 4 hereto.

4.2      Control of Cell Line.
         BI  PHARMA KG shall  maintain  (for  safety  reasons  in two  different
         buildings)  the Cell Line in safe and secure  storage under its control
         in its facilities and shall not permit the transfer of the Cell Line to
         any third  party  that is not  specifically  authorized  in  writing by
         IMCLONE (except to a contract laboratory used for the  characterization
         of the  MCB  or  MWCB  under  substantially  the  same  requirement  of
         confidentiality).  BI  PHARMA  KG  shall  comply  with  all  applicable
         regulatory  requirements  relating to general  safety and  biosafety in
         handling the Cell Line and any raw materials used in the Project.

4.3      Quarantine and Testing.
         BI PHARMA KG will  quarantine and test samples of the Cell Line already
         provided to it in order to verify  that the Cell Line is  suitable  for
         introduction into BI PHARMA KG's facilities. The quarantine and testing
         time is estimated to be about 2 (two) months.

4.4      Phase I/II Development Program.
         Following  quarantine testing of the MWCB (see Appendix 4) BI PHARMA KG
         will transfer and establish the production  process at laboratory scale
         ( [ *** ]  fermentation  scale)  on the  basis of  Process  information
         supplied by IMCLONE. The agreed upon process format for Phase II of the
         Project is given in Appendix 6.  Material  derived  from such a process
         will be tested for analytical  equivalence with reference material from
         IMCLONE. Remaining quantities may be used by IMCLONE at its discretion.
         A scale-up will then be performed to the [ *** ] fermentation scale and
         cGMP  material [ *** ] for  clinical  trials  will be  produced at this
         scale. The workscopes and timelines for such a program are given in the
         Master  Projectplans  (see Appendix 1 and Appendix 1.1). The production
         of further clinical material at [ *** ] fermentation scale, if required
         by IMCLONE,  has to be agreed upon separately in writing,  and shall be
         reflected in an amendment to this  Agreement in  accordance  within the
         terms set forth herein.

4.5      Responsibility for Failed Fermentations and Downstream Operations.

         [ *** ]

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              [ *** ]

         (b)  [ *** ]

4.6      Materials and Information to be Delivered.
         BI PHARMA KG will provide  IMCLONE  with the  following  materials  and
         information at the times indicated:

         (a)  a summary of the test results  generated during the 2 (two) months
              quarantine  period  within 30 (thirty)  days  following the end of
              such period;

         (b)  within 2 (two) months  following  completion  of each Phase of the
              Project (Phase I and Phase II), a report to IMCLONE,  as laid down
              detailed in Appendix 7 including,  a summary of the data BI PHARMA
              KG  collects  in the course of the  Project  and  Certificates  of
              Analysis for release of Product for clinical use, if any;

         (c)  other interim results as reasonable in appropriate time periods or
              requested by IMCLONE, as mutually agreed by the Project Team.

4.7      Product to be Delivered.
         BI PHARMA KG shall  supply  Product to  IMCLONE  from the [ *** ] pilot
         scale and all purified Product (cGMP grade) from the [ *** ] scale runs
         performed by BI PHARMA KG. BI PHARMA KG shall also provide IMCLONE with
         samples  of  vialed  Product  that  is  produced  by  it.  All  Product
         delivered,  if any, shall conform with the Specifications which have to
         be  mutually  agreed  upon as laid down in  Appendix 5 and BI PHARMA KG
         shall issue a Certificate of Analysis covering such Specifications.

         If the Product is  asserted by IMCLONE not to meet the  Specifications,
         both parties shall re-test the Product. If IMCLONE and BI PHARMA KG are
         not able to agree,  whether the Product meets the Specifications or not
         and the parties are unable to resolve  their  differences,  then either
         party may refer the matter to an independent specialized institution of
         international  reputation agreeable to both parties for final analysis,
         which shall be binding on both parties hereto.

         All Product  produced in the course of the Project shall be retained by
         BI PHARMA KG and stored  under  conditions  specified  by IMCLONE  (and
         reasonably  acceptable  to BI PHARMA KG) not longer  than 1 (one) year,
         and  delivered to IMCLONE as  instructed by IMCLONE and at the cost and
         risk of IMCLONE.

4.8      Prior Approval.
         Prior to  implementing  any  deviation  from the Project,  BI PHARMA KG

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         shall  notify  IMCLONE and obtain the  written  approval of the Project
         Manager of IMCLONE or other person designated in writing by IMCLONE.

4.9      Retention Samples.
         According to a sampling  plan to be agreed upon by the Project Team, BI
         PHARMA KG shall  isolate,  identify and retain samples of raw materials
         used in  fermentations  carried  out in the course of the  Project,  of
         Process media at appropriate time points in each  fermentation,  and of
         Product  at each  stage of  purification.  Retention  samples  shall be
         provided  promptly to IMCLONE at its request.  Shipment shall be at the
         cost and risk of IMCLONE.

4.10     Additional Work.
         On  request  of  IMCLONE,   BI  PHARMA  KG  shall  perform   additional
         development  work to sustain the progress of the Project on  conditions
         in terms of money,  time and scope to be subject to mutual agreement of
         the  parties   hereto  and  defined  in  an  amendment  to  the  Master
         Projectplans attached hereto as Appendix 1 and Appendix 1.1.

5.       Phase I/II to be Conducted on Fixed-Fee Basis

         The Project  shall be  conducted by BI PHARMA KG for IMCLONE on a fixed
         fee basis, in consideration of payment by IMCLONE of the Project Fee.

         The  estimated  duration of the Project shall be [ *** ] from the Start
         Date as outlined in Appendix 1 and Appendix 1.1. Phase I of the Project
         has been completed as of the Effective Date.

6.       Phase I/II Project Fee

         IMCLONE shall pay BI PHARMA KG a Project Fee of DM 8, 950,000
         (eightmillionninehundredandfiftythousand   Deutsche   Mark)   for   the
         services  provided in carrying out the Project as defined in Appendix 1
         and Appendix 1.1,  regardless of the  favorability or usefulness of the
         results  (see  Section 4.5 above).  Of this amount to date DM 3,130,000
         has been paid for the completion of Phase I.

         This fee includes all fees for BI PHARMA KG's services under the Master
         Projectplans  for Phase I and Phase II,  including  but not limited to,
         fees for Cell Line  validation,  facility  use, raw  material  testing,
         in-process   testing  services  including  bulk  and  finished  product
         testing, environmental monitoring as appropriate, and other calibration
         and validation

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         activities  required to  facilitate  the  successful  completion of the
         technology  transfer and  production of the clinical  grade material at
         the [ *** ] fermentation scale.

         Disposal of organic and hazardous waste is included in the Project Fee.
         The Project Fee shall be payable in installments,  each  non-refundable
         when paid,  as described in Appendix 1 and Appendix  1.1. To the extent
         BI PHARMA KG is  required  to repeat any  fermentations  or  downstream
         operations  pursuant to Section 4.5 (b) above, any installment  related
         to the  completion  of the  fermentation  or  downstream  operation  or
         delivery of the Product, as the case may be, shall not be payable until
         such  fermentation or downstream  operation or delivery of Product,  as
         the case may be, has been completed.

         The cost of commercially  available  materials purchased by IMCLONE for
         use at BI PHARMA KG to  support  development  in GLP and cGMP  shall be
         creditable to the applicable invoice.

         Each invoice shall be payable within 30 (thirty) days following receipt
         thereof.

7.       Additional Work / Future Activities

7.1      Additional Work.
         BI PHARMA KG and IMCLONE may confer to  determine  if  additional  work
         relating  to Phase I or Phase  II  should  be  undertaken  pursuant  to
         subsequent  agreement  between BI PHARMA KG and IMCLONE.  Neither party
         shall be obligated to conduct any further undertakings on behalf of the
         other  except as may be mutually  agreed and set forth in a  subsequent
         written agreement.

         7.2      Future Activities.

                  [ *** ]

7.3      Others.
         IMCLONE  shall not assert any right to use BI PHARMA KG  facilities  at
         any  future  date as a result  of its use of BI  PHARMA  KG  facilities
         pursuant to this Agreement,  nor shall BI PHARMA KG assert any right to
         use or have access to the Cell Line, Process, Product, MCB or MWCB as a
         result of its activities pursuant to this Agreement.

8.       Ownership of Project Data

8.1      General.
         All  information  and  intellectual  property  rights  relating  to the
         transfer of information  under Section 4.6 above, with the exception of
         BI PHARMA KG Confidential Information,  shall be the sole and exclusive
         property  of

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         IMCLONE and IMCLONE shall have the right to use such
         information for any purpose without further obligation to BI PHARMA KG.

         For the purpose of this Agreement all  information  regarding BI PHARMA
         KG's  facility and  technical  equipment  shall be considered BI PHARMA
         KG'S Confidential Information.

8.2      Intellectual Property Rights solely covering the Product.
         Any and all  intellectual  property rights solely covering the Product,
         including,  but not limited to, patents and patent applications arising
         out of the activities  performed under this Agreement shall be the sole
         and exclusive  property of IMCLONE,  which shall have the sole right to
         file such  applications  and will meet all costs in  relation  thereto.
         Upon request of IMCLONE, BI PHARMA KG will assign any and all rights as
         necessary to vest such ownership in IMCLONE.

8.3      All other Intellectual Property Rights.
         All other intellectual property rights that arise out of the activities
         performed  under  this  Agreement,  and that do not  cover  solely  the
         Product  shall be the sole and  exclusive  property of BI PHARMA KG and
         IMCLONE shall be granted a  non-exclusive,  royalty-free  and worldwide
         license solely for use to the Product.

9.       Representations. Warranties and Indemnification

9.1      IMCLONE.
         IMCLONE hereby represents, warrants and agrees that:

         (a)  IMCLONE is free to supply the Cell Line and  IMCLONE  Confidential
              Information to BI PHARMA KG;

         (b)  IMCLONE is not aware of any special or unusual hazards involved in
              handling the Cell Line or Product;

         (c)  IMCLONE has full corporate  authority to enter into this Agreement
              and this Agreement is binding upon IMCLONE in accordance  with its
              terms; and

         (d)  [ *** ]

9.2      BI PHARMA KG.
         BI PHARMA KG hereby represents, warrants and agrees that:

         (a)  BI PHARMA KG has the  lawful  right to use the  facilities  and BI
              PHARMA KG  Confidential  Information  to be used for  purposes set
              forth in this Agreement;

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         (b)  BI PHARMA KG is not aware of any special or unusual  hazards  that
              would  arise as a result of its  carrying  out of the  Project  as
              planned;

         (c)  BI  PHARMA  KG has full  corporate  authority  to enter  into this
              Agreement  and this  Agreement  is  binding  upon BI  PHARMA KG in
              accordance with its terms; and

         (d)        [ *** ]

         (e)  BI PHARMA KG warrants  that the Project shall be conducted as laid
              down in Appendix 1 and  Appendix 1.1 and in  accordance  with this
              Agreement and, when appropriate, in compliance with cGMP, and that
              any  documentation  of Project  results or procedures  provided to
              IMCLONE  by BI  PHARMA  KG  shall  be  accurate  in  all  material
              respects.
              With regard to the results see Section 4.5 above.

10.      Limitation of Liability

10.1     No Warranty of Merchantability or Fitness.
         Subject to Section 9.2 above, BI PHARMA KG shall provide the results of
         the  Project to IMCLONE  without any  warranty of any kind,  express or
         implied,    including,    without   limitation,   any   warranties   of
         merchantability or fitness for a particular purpose.

         10.2     Limitation of Liability.

                  [ *** ]

10.3     Maximum Amount.
         BI PHARMA KG  undertakes to use its best efforts to perform the Project
         under the Master Projectplans and to meet the target dates set forth in
         Appendix 1 and Appendix 1.1 hereto. [ *** ].

11.      Confidentiality

11.1     BI PHARMA KG.
         BI PHARMA KG shall not disclose IMCLONE Confidential Information to any
         person other than its employees or employees of affiliated companies of
         the Boehringer  Ingelheim group who are bound by similar obligations of
         confidentiality  and who have a need to know such  information in order
         to perform their duties in carrying out the Project hereunder.

11.2     IMCLONE.
         IMCLONE shall not disclose any BI PHARMA KG Confidential Information to
         any person other than:

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                                                                        Page: 17


         (a)  its  employees  or  consultants  who are  bound  by  substantially
              similar obligations of confidentiality and who have a need to know
              such information in order to provide  direction to BI PHARMA KG or
              evaluate the results of the Project; or

         (b)  regulatory  authorities,  for example,  the FDA, that require such
              information in order to review an IND or other regulatory filing.

11.3     Exceptions.
         The obligations of confidentiality  applicable to IMCLONE  Confidential
         Information and BI PHARMA KG Confidential  Information  shall not apply
         to any information that is:

         (a)  known publicly or becomes known  publicly  through no fault of the
              recipient;

         (b)  learned by the recipient  from a third party  entitled to disclose
              it;

         (c)  developed by the recipient  independently of information  obtained
              from the disclosing party as evidenced by prior written records of
              the recipient;

         (d)  already known to the recipient  before receipt from the disclosing
              party, as shown by its prior written records;

         (e)  required  to be  disclosed  by law,  regulation  or the order of a
              judicial or administrative authority;  provided that the recipient
              notifies the disclosing party immediately upon receipt at any such
              order or becoming aware of any such law or regulation, or released
              with the prior written consent of the disclosing party.

11.4     Others.
         No right or license  under any patent or  proprietary  right is granted
         hereunder  by  virtue  of  the   disclosure  of  IMCLONE   Confidential
         Information  or  BI  PHARMA  KG  Confidential   Information  except  as
         expressly  provided herein.  The obligations of both parties under this
         Section  11  shall  survive  the  expiration  or  termination  of  this
         Agreement.  Both  IMCLONE  and BI PHARMA KG shall  use  reasonable  and
         customary precautions to safeguard IMCLONE Confidential Information and
         BI PHARMA KG  Confidential  Information,  including  ensuring  that all
         employees or consultants  who are provided  access to such  information
         are  informed  of the  confidential  and  proprietary  nature  of  such
         information and understand that all such  information is required to be
         maintained confidential.

12.      Term and Termination

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                                                                        Page: 18


12.1     Term.
         This Agreement shall come into force as of the date first above written
         and commence  retroactively as of the Start Date and, unless terminated
         earlier as provided herein, shall terminate upon the date of payment of
         the last sum due  hereunder,  or upon the date  when the last  services
         required to be performed hereunder are performed,  whichever date shall
         last occur unless specifically extended by further written agreement.

12.2     Right to Terminate.
         If it becomes apparent to either party at any stage of the Project that
         it will not be  possible to carry out the  Project  for  scientific  or
         technical  reasons or as a result of Force  Majeure  (as  described  in
         Section 13 below),  the parties shall permit 30 (thirty)  business days
         for  discussion to resolve,  if possible,  the  scientific or technical
         issue  giving rise to the  problem.  If the parties fail to resolve the
         problem within this 30 (thirty) day period, either party shall have the
         right to terminate this Agreement, effective upon written notice to the
         other.

         In the event of such a termination initiated by IMCLONE, [ *** ]

         Either party may terminate this Agreement effective upon written notice
         if either of the following events occurs:

         (a)  The other party commits a breach of this  Agreement and the breach
              is not  remedied  within 30  (thirty)  days  after the  receipt of
              notice  identifying  the breach,  requiring its remedy and stating
              the intent of the party to terminate in the absence of remedy; or

         (b)  The other party (i) becomes unable to pay its debts as they become
              due,  (ii)  suspends  payment of its debts,  (iii)  enters into or
              becomes   subject  to  corporate   rehabilitation   or  bankruptcy
              proceedings  or  liquidation   or   dissolution,   (iv)  makes  an
              assignment  for the benefit of its  creditors  or (v) seeks relief
              under any similar laws for debtor's relief.

12.3     Effect of Termination.

         Upon the expiration or termination of this Agreement:

         (a)  At the request of IMCLONE,  BI PHARMA KG shall deliver at the cost
              and risk of IMCLONE  all vials of the Cell  Line,  the MCB and the
              MWCB, as well as  description of all methods  relating  thereto to
              IMCLONE or its  designee  and shall  promptly  return all  IMCLONE
              Confidential  Information  to  IMCLONE;  except for a single  copy
              and/or sample for documentation purposes only and

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                                                                        Page: 19


         (b)  IMCLONE  shall  promptly  return  all BI  PHARMA  KG  Confidential
              Information  to BI PHARMA  KG,  except  for a single  copy  and/or
              sample for documentation purposes only.

              The   respective   rights  of  BI  PHARMA   KG  and   IMCLONE   to
              indemnification  as set  forth in  Sections  9 and 10 above  shall
              survive  termination  of this Agreement with respect to any claims
              that relate to or derive from the Project, or any acts or failures
              to act, of either BI PHARMA KG or IMCLONE in  connection  with the
              Project that occur prior to termination.

13.      Miscellaneous

13.1     Force Majeure.
         Neither  party  shall be in  breach of this  Agreement  if there is any
         failure of performance  under this Agreement (except for payment of any
         amounts  incurred  hereunder prior to Force Majeure)  occasioned by any
         act of God,  fire, act of government or state,  war,  civil  commotion,
         insurrection, embargo, prevention from or hindrance in obtaining energy
         or other  utilities,  labor  disputes of  whatever  nature or any other
         reason beyond the control of either party.

13.2     Publicity.
         Except as required by law (e.g. SEC-requirements),  no press release or
         other form of publicity  regarding the Project or this Agreement  shall
         be permitted to be published  unless both parties have indicated  their
         consent  to the form of the  release.  Notwithstanding  the  foregoing,
         IMCLONE may elect to issue a press  release or other form of  publicity
         regarding the Project at any time,  but shall first notify BI PHARMA KG
         of such  issuance  and  provide  BI  PHARMA KG with an  opportunity  to
         comment thereon. Nothing in this Section 13.2 shall prevent the parties
         from disclosing this Agreement as required by applicable laws, rules or
         regulations.

13.3.    Notices.
         Any notice  required or permitted to be given hereunder by either party
         shall be in writing and shall be (i) delivered personally, (ii) sent by
         registered  mail,  return receipt  requested,  postage prepaid or (iii)
         delivered  by  facsimile  with  immediate  telephonic  confirmation  of
         receipt,  to the addresses or facsimile  numbers set forth below: If to
         BI PHARMA KG:                       Boehringer Ingelheim Pharma KG
                                             Birkendorfer Stra(beta)e 65
                                             D-88397 Biberach an der Riss
                                             Federal Republic of Germany
                                             Attention: Dr. Wolfram Carius
                                             Fax:      + 0049 73 51/54-98049
                                             Phone + 0049 73 51/54-9421

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Contract Research and Development  Agreement Bl Pharma KG/ImClone,  IMCL 13r.doc
                                                                        Page: 20

         If to IMCLONE:                 ImClone Systems Incorporated
                                        180 Varick Street, 7th Floor
                                        New York, New York 10014
                                        Attention: Mr. John B. Landes,
                                                     Vice President,
                                        Business Development and General Counsel
                                        Fax:      001 212 645 1405
                                        Phone: 001 212 645 2054

         Each notice  shall be deemed given (i) on the date it is received if it
         is  delivered  personally,  (ii) 1  (one)  day  after  the  date  it is
         postmarked  if it is sent  by  certified  United  States  mail,  return
         receipt requested,  postage prepaid or (iii) on the date it is received
         if it is sent by facsimile with immediate  telephonic  confirmation  of
         receipt.

13.4.    Applicable Law.
         This  Agreement  shall be governed by and construed in accordance  with
         the laws of Germany without regard to its choice of law principles. The
         courts of the place of  domicile  of BI PHARMA KG shall have  exclusive
         jurisdication over all legal matters and proceedings hereunder.

13.5     Compliance with Laws.
         BI PHARMA KG shall  perform  the work  hereunder  in  conformance  with
         GLP/cGMP, as applicable,  and all German and/or EU laws, ordinances and
         governmental rules or regulations pertaining thereto.

13.6.    Independent Contractors.
         Each of the parties  hereto is an  independent  contractor  and nothing
         herein  contained  shall be deemed to constitute  the  relationship  of
         partners,  joint  venturers,  nor of  principal  and agent  between the
         parties hereto. Neither party shall hold itself out to third persons as
         purporting  to act on behalf  of, or serving as the agent of, the other
         party.

13.7.    Waiver.
         No waiver of any term, provision or condition of this Agreement whether
         by conduct or otherwise in any one or more instances shall be deemed to
         be or  construed  as a further or  continuing  waiver of any such term,
         provision or condition or of any other term,  provision or condition of
         this Agreement.

13.8     Severability.
         If  any  provision  of  this   Agreement  is  held  to  be  invalid  or
         unenforceable by a court of competent jurisdiction all other provisions
         shall  continue in full force and effect.  The parties  hereby agree to
         attempt to substitute for

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         any invalid or unenforceable provision a valid or enforceable provision
         which achieves to the greatest  extent  possible the economic legal and
         commercial objectives of the invalid or unenforceable provision.

13.9     Entirety.
         This Agreement,  including any exhibits and appendices  attached hereto
         and  referenced  herein,  constitutes  the  full  understanding  of the
         parties and a complete  and  exclusive  statement of the terms of their
         agreement,  and no  terms,  conditions,  understandings  or  agreements
         purporting to modify or vary the terms thereof shall be binding  unless
         it is hereafter made in writing and signed by both parties.

13.10    Assignment.
         Neither  party may assign this  Agreement to a third  party,  except an
         affiliate  (including a subsidiary or division),  and either IMCLONE or
         BI PHARMA KG may assign this  Agreement in connection  with the sale of
         all or substantially all of such party's assets or similar transaction.
         This Agreement  shall be binding upon the successors and assigns of the
         parties  and the name of a party  appearing  herein  shall be deemed to
         include the names of its successors and assigns.

IN WITNESS WHEREOF,  the parties have caused this Agreement to be executed as of
the Effective Date.

Biberach, ...........................1999          New York, April 30, 1999

Boehringer Ingelheim Pharma KG                     ImClone Systems Incorporated

                              ppa.

/s/ Dr. Jacob             /s/ Prof. R.G. Werner     /s/ John B. Landes


Dr. Jacob                 Prof. R. G. Werner         By: John B. Landes
Member of the Board       Head of Industrial
                          Biopharmaceuticals         Title: VP, General Counsel

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Contract Research and Development  Agreement Bl Pharma KG/ImClone,  IMCL 13r.doc
                                                                        Page: 22


Appendices:
- -----------
Appendix 1:          Master Projectplan including Project Timeline
Appendix 1.1:        Updated Master Projectplan including Project timeline
Appendix 2:          Project Team
Appendix 3:          IMCLONE s Tasks in Detail
Appendix 4:          BI PHARMA KG s Tasks in Detail
Appendix 5:          Test Methods and Specifications for C225
Appendix 6:          Protein A Process Format
Appendix 7:          Summary Data Reports for Phase I and Phase II

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<PAGE>

Appendix 1  Page 1 of 2

Master Projectplan: C225
ImClone Systems, Inc./Bl Pharma KG
Forecast of proposed Workscope and Cost Estimate

[ *** ]


<PAGE>

Appendix 1.1 Page 1 of 4

Update May 1999 Ma ster Projectplan: C225
ImClone Systems, Inc./Bl Pharma KG
Forecast of proposed Workscope and Cost Estimate

  [***]


<PAGE>

<TABLE>
<CAPTION>
                                   Appendix 2


             Function                   Boehringer Ingelheim               ImClone

<S>                                     <C>                          <C>
        Project Team Leader             Dr. Helmut Hoffmann          Mr. Ronald Martell (?)
                                                                     Ms. Martie Bohn

    Head of Process Development         Dr. Helmut Hoffmann                  (?)

Cell Banking and Characterization,      Dr. Stefanos Grammatikos     Ms. Betsy Hornberger
           Virus Testing                                             Dr. Daniel Velez
                                                                     Dr. S. Joseph Tarnowski

   Small Scale Cell Culture Labs        Dr. Wolfgang Noe             Mr. Joel Goldstein
                                                                     Mr. Rajeew Gupta
                                                                     Dr. Daniel Velez
                                                                     Dr. S. Joseph Tarnowski

     Fermentation Pilot Plant           Dr. Ralph Kempken            Mr. Joel Goldstein
                                                                     Mr. Rajeew Gupta

       Downstream Processing            Dr. Joachim Walter           Dr. Daniel Velez
                                                                     Mr. Joel Goldstein
                                                                     Dr. S. Joseph Tarnowski

   Protein Analytical Chemistry         Dr. Michael Schluter         Ms. Betsy Hornberger

        Process Validation              Mr. Norbert Hentschel        Mr. Glen Noonan

              Filling                   Mr. Hans Hormann             Mr. Edward Patten

            Regulatory                  Dr. Uwe Bucheler             Ms. Gretchen Toolan

           Documentation                Dr. Uwe Bucheler             Mr. Edward Patten

         Quality Assurance              Mrs. Bettina Schulz

             Contract                   Mrs. Kipping
</TABLE>


<PAGE>

                                   Appendix 3


                           ImClone's Tasks in Details


[ *** ]


<PAGE>

                                   Appendix 4


                         BI PHARMA KG's Tasks in Detail


       [ *** ]


<PAGE>

Appendix 5: Test Methods and Specifications for C225


[ ***]


<PAGE>

                                   Appendix 6

                            [ *** ] A Process Format


[***]


<PAGE>

                                   Appendix 7


                  Summary Data Reports for Phase I and Phase II



                                                                    Exhibit 99.6

                          IMCLONE SYSTEMS INCORPORATED

                1996 NON-QUALIFIED STOCK OPTION PLAN, AS AMENDED(1)


                                    ARTICLE I

                                 Purpose of Plan

         1.1 General Purpose. The purpose of this Non-Qualified Stock Option
Plan (the "Plan") is to promote the interests of ImClone Systems Incorporated
(the "Company") by affording key consultants, advisors, directors and employees
an opportunity to acquire a proprietary interest in the Company pursuant to
stock options issued by the Company, and thus to create in such persons
increased personal interest in its continued success.

         1.2 Statutory Stock Option. Options granted under the Plan are intended
to be "non-qualified" stock options under the Internal Revenue Code of 1986, as
amended (the "Code").

                                   ARTICLE II

                             Shares Subject to Plan

         2.1 Description of Shares. Subject to Article VIII hereof, the stock to
which the Plan applies is shares of the Company's common stock, $.001 par value
("Common Stock"), either authorized but unissued or Treasury shares. The number
of shares of Common Stock to be issued or sold pursuant to options granted
hereunder shall not exceed 4,000,000 shares; provided,

- ----------
         1 This plan was adopted by the Board on February 25, 1996 and approved
by the stockholders on June 3, 1996; it was amended by the Board on April 3,
1997 and such amendments were ratified by the stockholders on June 3, 1997; it
was amended by the Board on March 29, 1999 and such amendments were ratified by
the stockholders on May 24, 1999.


                                       1
<PAGE>

         that such number shall be reduced by the number of shares which have
been sold under, or may be sold pursuant to options granted from time to time
under, the Company's 1996 Incentive Stock Option Plan (the "Incentive Stock
Option Plan") to the same extent as if such sales had been made or options had
been granted pursuant to this Plan.

         2.2 Restoration of Unpurchased Shares. Any shares subject to an option
granted hereunder that, for any reason, expires or is terminated unexercised as
to such shares may again be subject to an option to be granted hereunder.

                                   ARTICLE III

                     Administration; Committees; Amendments

         3.1 Administration. The Plan shall be administered by any of the
Compensation Committee, the Stock Option Committee (which is a subcommittee of
the Compensation Committee) (collectively, the "Committees") or the Board of
Directors of the Company (the "Board"). The Committees shall be comprised of not
less than two persons who shall be appointed by the Board from among the members
of the Board. Members of the Committees and the Board shall be eligible to
become participants under the Plans and may receive discretionary and
non-discretionary grants of options.

         3.2 Duration; Removal; Etc. The members of the Committees shall serve
at the pleasure of the Board, which shall have the power at all times to remove
members from the Committees or to add members thereto. Vacancies in the
Committees, however caused, shall be filled by action of the Board.


                                       2
<PAGE>

         3.3 Meetings; Actions of Committee. Each of the Committees may select
one of its members as its Chairman and shall hold its meetings at such times and
places as it may determine. All decisions or determinations of the Committees
and the Board shall be made by the majority vote or decision of all of its
members, whether present at a meeting or not; provided, however, that any
decision or determination reduced to writing and signed by all of the members
shall be as fully effective as if this had been made at a meeting duly called
and held. Each of the Committees and the Board may make such rules and
regulations for the conduct of its business not inconsistent herewith as it may
deem advisable.

         3.4 Interpretation. The interpretation and construction by any of the
Committees or the Board of the provisions of the Plan or of the options granted
hereunder shall be final, unless in the case of the Committees otherwise
determined by the Board. No member of the Board or of the Committees shall be
liable for an action taken or determination made in good faith.

         3.5 Amendments or Discontinuation. The Board may make such amendments,
changes, and additions to the Plan, or may discontinue and terminate the Plan,
as it may deem advisable from time to time; provided, however, that no action
shall affect or impair any options theretofore granted under the Plan, and
provided, further, however, that the affirmative vote of the owners of a
majority of the outstanding shares of Common Stock present at a meeting in
person or by proxy and entitled to vote shall be necessary to effect any
amendment to the Plan which would increase the number of shares of Common Stock
subject to options granted under the Plan.


                                       3
<PAGE>

                                   ARTICLE IV

                  Participants; Maximum Grant; Duration of Plan

         4.1 Eligibility and Participation. Options shall be granted only to
persons ("Participants") who at the time of granting are key consultants,
advisors, directors or employees of the Company. Any of the Committees or the
Board shall determine the key consultants, advisors, directors and employees to
be granted options hereunder, the number of shares of Common Stock subject to
such options, the exercise prices of options, the terms thereof and any other
provisions not inconsistent with the Plan.

         4.2 Guidelines for Participation. In selecting Participants and
determining the numbers of shares of Common Stock for which options are to be
granted, any of the Committees or the Board shall consult with officers and
directors of the Company, and shall take into account the duties of the
respective persons, their present and potential contributions to the success of
the Company, and such other factors as any of the Committees or the Board shall
deem relevant.

         4.3 Duration of Plan. All options under the Plan shall be granted
within ten years from the date the Plan is approved by the shareholders of the
Company.


                                       4
<PAGE>

                                    ARTICLE V

                         Terms and Conditions of Options

         5.1 Individual Stock Option Agreements. All stock options granted
pursuant to the Plan shall be evidenced by stock option agreements ("Stock
Option Agreements"), which need not be identical, between the Company and the
Participant in such form as any of the Committees or the Board shall from time
to time approve, subject to the terms of the Plan.

         5.2 Number of Shares. Each Stock Option Agreement shall state the total
number of shares of Common Stock with respect to which the option is granted,
the terms and conditions of the option, and the exercise price or prices
thereof, it being understood that any of the Committees or the Board shall,
subject to the terms of Article VII hereof, have authority to prescribe in any
Stock Option Agreement that the option evidenced thereby may be exercisable in
full or in part, as to any number of shares subject thereto, at any time or from
time to time during said term as any of the Committees or the Board may
determine; provided that no option granted pursuant to the Plan shall be
exercisable after the expiration of ten years from the date such option is
granted. Except as otherwise provided in any Stock Option Agreement, an option
may be exercised at any time or from time to time during the term of the option
as to any or all full (but no fractional) shares which have become purchasable
under such option. Subject to the terms of Article VII hereof, any of the
Committees or the Board shall have the right to accelerate, in whole or in part,
from time to time, conditionally or unconditionally, the right to exercise any
option granted hereunder.


                                       5
<PAGE>

         5.3 Option Price. Subject to the terms of Article VII hereof, the price
at which the shares of Common Stock subject to each option granted under this
Plan may be purchased (the "option price" or "exercise price") shall be
determined by any of the Committees or the Board, which shall have the authority
at the time the option is granted to prescribe in any Stock Option Agreement
that the price per share, with the passage of pre-determined periods of time,
shall increase from the original price to higher prices.

         5.4 Method of Exercising Option; Full Payment. Subject to the terms of
Article VII hereof and Section 6.1 and Section 6.2 hereof, options granted
pursuant to the Plan may be exercised only if the Participant was, at all times
during the period beginning on the date the option was granted and ending on the
date of such exercise, a key consultant, advisor, director or employee of the
Company. Options shall be exercised by written notice to the Company, addressed
to the Company at its principal place of business. Such notice shall state the
Participant's election to exercise the option and the number of shares of Common
Stock in respect of which it is being exercised, and shall be signed by the
Participant so exercising the option. Such notice shall be accompanied by (a)
the Stock Option Agreement (which, if not exercised for all the shares subject
thereto, shall be appropriately endorsed and returned to the Participant); (b)
payment of the full purchase price of such shares, which payment shall be in
cash, by check or in stock of the Company that has been owned by the Participant
for at least six months, or notes of the Company or, as agreed to by the Board,
other consideration; and such written representations and other documents as may
be desirable, in the opinion of the Company's legal counsel, for purposes of
compliance with state or Federal securities or other laws. In the case of
payment made in stock of the Company, the stock shall be valued at its Fair


                                       6
<PAGE>

Market Value (as hereinafter defined) on the last business day prior to the date
of exercise. The term "Fair Market Value" for the Common Stock on any particular
date shall mean the last reported sale price of the Common Stock on the
principal market on which the Common Stock trades on such date or, if no trades
of Common Stock are made or reported on such date, then on the next preceding
date on which the Common Stock traded. The Company shall deliver a certificate
or certificates representing shares of Common Stock purchased pursuant to such
notice to the purchaser as soon as practicable after receipt of such notice,
subject to Article IX hereof. Any of the Committees or the Board may amend an
already outstanding Stock Option Agreement to add a provision permitted by
clause (b) of this Section 5.4, and no such amendment, by itself, shall be
deemed to constitute the grant of a new option for purposes of this Plan.

         5.5 Rights as a Shareholder. No Participant shall have any rights as a
shareholder with respect to shares of Common Stock subject to an option granted
under the Plan until the date of the issuance to such Participant of a stock
certificate in respect of such shares. No adjustment shall be made for dividends
or other rights for which the record date is prior to the date such stock
certificate is issued.

         5.6 Other Provisions. Stock Option Agreements entered into pursuant to
the Plan may contain such other provisions (not inconsistent with the Plan) as
any of the Committees or the Board may deem necessary or desirable, including,
but not limited to, covenants on the part of the Participant not to compete, not
to sell Common Stock obtained from the exercise of options for specified periods
of time, and remedies available to the Company in the event of the breach of any
such covenant.


                                       7
<PAGE>

                                   ARTICLE VI

                          Termination; Transferability

         6.1 Termination. Except as otherwise provided in connection with the
grant of any option or the termination of any Participant, the right to exercise
any unexercised portion of any option granted under the Plan shall terminate on
the date of termination of the relationship between the Participant and the
Company, for any reason, without regard to cause, other than by reason of death
or disability. The option may not be exercised thereafter, and the shares of
Common Stock subject to the unexercised portion of such option may again be
subject to new options under the Plan. Such restrictions shall not apply to the
options granted pursuant to Article VII which shall be exercisable in accordance
with the terms thereof.

         6.2 Death or Disability of Participant. Except as otherwise permitted
in connection with the grant of any option or the death or disability of a
Participant, in the event a Participant dies or is disabled while he is a
consultant, advisor, director or employee of the Company, any options
theretofore granted to him shall be exercisable only within the next 12 months
immediately succeeding such death or disability and then only (a) in the case of
death, by the person or persons to whom the Participants rights under the option
shall pass by will or the laws of descent and distribution, and in the case of
disability, by such Participant or his legal representative, and (b) if and to
the extent that he was entitled to exercise the option at the date of his death
or disability. Such restrictions shall not apply to the options of Participating
Directors which shall be exercisable in accordance with the terms set forth in
Article VII hereof.

         6.3 Transferability. Options granted to a Participant under the Plan
shall not be transferable otherwise than by will, by the laws of descent and
distribution, or (if authorized in


                                       8
<PAGE>

the applicable Stock Option Agreement) pursuant to a qualified domestic
relations order ("QDRO") as defined by the Internal Revenue Code of 1986, as
amended, or Title I of the Employee Retirement Income Security Act of 1974, as
amended, or the rules thereunder. During the Participant's lifetime, options
shall be exercised only by such Participant, such Participant's guardian or
legal representative, or (if authorized in the applicable Stock Option
Agreement) such Participant's transferee pursuant to a QDRO.

                                   ARTICLE VII

                                Directors' Grants

         7.1 Eligibility. Annually, on February 15 of each of the Company's
Fiscal Years, any Director of the Company who at the time is not a full-time
employee of the Company (a "Participating Director"), shall be granted an option
for 15,000 shares of Common Stock, except that the Chairman who is not a
full-time employee of the Company shall be granted an option for 30,000 shares
of Common Stock. Each person who becomes a Participating Director after the
first day of the Company's fiscal year and within nine months of that date shall
be granted, on the date that person becomes a Participating Director, an option
for a number of shares of Common Stock determined by pro rating the normal
15,000 share annual amount (or 30,000 if the Chairman) based on the period of
time remaining in the fiscal year in which such person becomes a Participating
Director. No person who owns 10% or more of the outstanding Common Stock of the
Company (including shares of Common Stock issuable upon exercise of outstanding
options and warrants), shall be granted options under this Article. Options
under this Article are non-discretionary.


                                       9
<PAGE>

         7.2 Options Terms. Options granted under this Article VII shall not be
exercisable until the date upon which the option holder has provided one year of
continuous service as a Participating Director following the date of grant of
such option. Options granted pursuant to this Article shall have an exercise
price equal to the Fair Market Value (as hereinafter defined) of the Common
Stock on the date of the grant. The term "Fair Market Value" for the Common
Stock on any particular date shall mean the last reported sale price of the
Common Stock on the principal market on which the Common Stock trades on such
date or, if no trades of Common Stock are made or reported on such date, then on
the next preceding date on which the Common Stock traded. Notwithstanding any
other provisions of this Plan, options granted under this Article shall remain
exercisable for ten years after the date of grant and the option holder (or his
legal representative or that of his estate) may continue to exercise an option
notwithstanding that the holder ceases to be a Participating Director.

         7.3 Other Provisions. In all other respects, Options granted under this
Article VII shall be subject to the other provisions of the Plan, including but
not limited to those governing method of exercise, exercise payment, tax
withholding, and transferability. Notwithstanding any other provisions of this
Plan, the provisions of this Article VII may not be amended more than once every
six months, other than to comport with changes in the Code.

                                  ARTICLE VIII

                               Capital Adjustments

         8.1 Capital Adjustments. If any change is made in the shares of Common
Stock subject to the Plan or subject to any option granted under the Plan
(through merger, consolidation,


                                       10
<PAGE>

reorganization, recapitalization, stock dividend, split-up, combination of
shares, exchange of shares, issuance of rights to subscribe, or change in
capital structure), appropriate adjustments shall be made by any of the
Committees or the Board as to the maximum number of shares subject to the Plan
and the number of shares and price per share subject to outstanding options as
shall be equitable to prevent dilution or enlargement of option rights. Any
determination made by any of the Committees or the Board under this Article VIII
shall be final, binding and conclusive upon each Participant.

                                   ARTICLE IX

                            Legal Requirements, Etc.

         9.1 Revenue Stamps. The Company shall be responsible and shall pay for
any transfer, revenue, or documentary stamps with respect to shares issued upon
the exercise of options granted under the Plan.

         9.2 Legal Requirements. The Company shall not be required to issue
certificates for shares upon the exercise of any option unless and until, in the
opinion of the Company's legal counsel, such issuance would not result in a
violation of any state or Federal securities or other law. Certificates for
shares, when issued, shall have, if required in the opinion of the Company's
legal counsel, the following legend, or statements of other restrictions,
endorsed thereon, and may not immediately be transferable:

         The shares of Common Stock evidenced by this certificate have been
         issued to the registered owner in reliance upon written representations
         that these shares have been purchased for investment. These shares may
         not be sold, transferred, or assigned unless, in the opinion of the
         Company and its legal counsel, such sale, transfer, or assignment will
         not be in violation of the Securities Act of 1933, as


                                       11
<PAGE>

         amended, applicable rules and regulations of the Securities and
         Exchange Commission and any applicable state securities laws.

         9.3 Private Offering. The options to be granted under the Plan are
available only to a limited number of present and future key consultants,
advisors, directors and employees of the Company who have knowledge of the
Company's financial condition, management, and affairs. Such options are not
intended to provide additional capital for the Company, but are to encourage
stock ownership by the Company's key personnel. By the act of accepting an
option, in the absence of an effective registration statement under the
Securities Act of 1933, as amended, Participants shall agree that upon exercise
of such option, they will acquire the shares of Common Stock that are the
subject thereof for investment and not with any intention at such time to resell
or redistribute the same, and they shall confirm such agreement at the time of
exercise, but the neglect or failure to confirm the same in writing shall not be
a limitation of such agreement.


                                       12
<PAGE>

                                    ARTICLE X

                                     General

         10.1 Application of Funds. The proceeds received by the Company from
the sale of shares of Common Stock pursuant to the exercise of options therefor
shall be used for general corporate purposes.

         10.2 Right of the Company to Terminate Relationship. Nothing contained
in the Plan or in a Stock Option Agreement shall confer upon any Participant any
right to be continued as a consultant, advisor, director or employee of the
Company, or interfere in any way with the right of the Company to terminate such
relationship for any reason whatsoever, with or without cause, at any time.

         10.3 No Obligation to Exercise. The granting of an option hereunder
shall impose no obligation upon the Participant to exercise such option.

         10.4 Effectiveness of Plan. The Plan shall become effective upon its
adoption by the Board. Options may be granted under the Plan prior to the
approval of the Plan by the Shareholders, but no such option may be exercised
prior to such approval.

         10.5 Other Benefits. Participation in the Plan shall not preclude a
Participant from eligibility in any other stock benefit plan of the Company or
any old age benefit, insurance, pension, profit sharing, retirement, bonus or
other plan which the Company has adopted, or may, at any time, adopt.

         10.6 Tax Requirements. The exercise or surrender of any option under
this Plan shall constitute a Participant's full and complete consent to whatever
action any of the Committees or


                                       13
<PAGE>

the Board elect to satisfy the Federal and state withholding requirements, if
any, which the Committee in its discretion deems applicable to such exercise.

         10.7 Interpretations and Adjustments. To the extent permitted by Law,
an interpretation of the Plan and a decision on any matter within any of the
Committees' or the Board's discretion made in good faith is binding on all
persons. A misstatement or other mistake of fact shall be corrected when it
becomes known, and the person responsible shall make such adjustment on account
thereof as he considers equitable and practicable.

         10.8 Information. The Company shall, upon request or as may be
specifically required hereunder, furnish or cause to be furnished, all of the
information or documentation which is necessary or required by any of the
Committees or the Board to perform its duties and functions under the Plan.

         10.9 Governing Law. The Plan and any and all options granted thereunder
shall be governed by, and construed and enforced in accordance with, the laws of
the State of New York from time to time in effect.

         10.10 Certain Definitions.

         10.10.1 "Parent". The term "parent" shall mean a "parent corporation"
as defined in Section 424(e) of the Code.

         10.10.2 "Subsidiary". The term "subsidiary" shall mean a "subsidiary
corporation" as defined in Section 424(f) of the Code.

         10.10.3 "Disabled". The term "disabled" shall have the definition set
forth in Section 22(a) (3) of the Code.


                                       14




                                                                    Exhibit 99.7
                          IMCLONE SYSTEMS INCORPORATED

                  1996 INCENTIVE STOCK OPTION PLAN, AS AMENDED(1)

                                    ARTICLE 1

                                 Purpose of Plan

         1.1 General Purpose. The purpose of this Incentive Stock Option Plan
(the "Plan") is to promote the interests of ImClone Systems Incorporated, and
any subsidiaries of such company, as from time to time may be formed or acquired
(collectively, the "Company"), by affording key executives and employees an
opportunity to acquire a proprietary interest in the Company pursuant to stock
options issued by the Company, and thus to create in such employees increased
personal interest in its continued success.

         1.2 Statutory Stock Option. Options granted under the Plan are intended
to be "incentive stock options" to which Section 422 of the Internal Revenue
Code of 1986, as amended (the "Code"), applies.

- ----------
(1) This plan was adopted by the Board on February 25, 1996 and approved by the
stockholders on June 3, 1996; it was amended by the Board on April 3, 1997 and
such amendments were ratified by the stockholders on June 3, 1997; it was
amended by the Board on March 29, 1999 and such amendments were approved by the
stockholders on May 24, 1999.


                                       1
<PAGE>

                                   ARTICLE II

                             Shares Subject to Plan

         2.1 Description of Shares. Subject to Article VII hereof, the stock to
which the Plan applies is shares of the Company's common stock, $.001 par value
("Common Stock"), either authorized but unissued or Treasury shares. The number
of shares of Common Stock to be issued or sold pursuant to options granted
hereunder shall not exceed 4,000,000 shares; provided, that such number shall be
reduced by the number of shares which have been sold under, or may be sold
pursuant to options granted from time to time under, the Company's 1996
Non-Qualified Stock Option Plan (the "Non-Qualified Plan"), to the same extent
as if such sales had been made or options had been granted pursuant to this
Plan.

         2.2 Restoration of Unpurchased Shares. Any shares subject to an option
granted hereunder or under the Non-Qualified Plan that, for any reason, expires
or is terminated unexercised as to such shares may again be subject to an option
to be granted hereunder.

                                   ARTICLE III

                     Administration; Committees; Amendments

         3.1 Administration.. The Plan shall be administered by any of the
Compensation Committee, the Stock Option Committee (which is a subcommittee of
the Compensation Committee) (collectively, the "Committees") or the Company's
Board of Directors (the "Board"). The Committees shall be comprised of not less
than two persons who shall be appointed by the Board from among the members of
the Board. Members of the Committees shall not be eligible


                                       2
<PAGE>

to become participants under the Plan while they are members of the Committees
or for a period of three months thereafter.

         3.2 Duration; Removal; Etc. The members of the Committees shall serve
at the pleasure of the Board, which shall have the power at all times to remove
members from the Committees or to add members thereto. Vacancies in the
Committees, however caused, shall be filled by action of the Board.

         3.3 Meetings; Actions of Committees. Each of the Committees and the
Board may select one of its members as its Chairman and shall hold its meetings
at such times and places as it may determine. All decisions or determinations of
each of the Committees and the Board shall be made by the majority vote or
decision of all of its members, whether present at a meeting or not; provided,
however, that any decision or determination reduced to writing and signed by all
of the members shall be as fully effective as if it had been made at a meeting
duly called and held. Each of the Committees and the Board may make such rules
and regulations for the conduct of its business not inconsistent herewith as it
may deem advisable.

         3.4 Interpretation. The interpretation and construction by any of the
Committees or the Board of the provisions of the Plan or of the options granted
hereunder shall be final, unless in the case of the Committees otherwise
determined by the Board. No member of the Board or of the Committees shall be
liable for any action taken or determination made in good faith.

         3.5 Amendments or Discontinuation. The Board may make such amendments,
changes, and additions to the Plan, or may discontinue and terminate the Plan,
as it may deem advisable from time to time; provided, however, that no action
shall affect or impair any options


                                       3
<PAGE>

theretofore granted under the Plan, and provided, further, however, that the
affirmative vote of the owners of a majority of the outstanding shares of Common
Stock present at a meeting in person or by proxy and entitled to vote at the
meeting shall be necessary to effect any amendment to the Plan which would (a)
increase the number of shares of Common Stock subject to options granted under
the Plan, or (b) authorize the granting of options at a price below the minimum
price established by Section 5.3 hereof.

                                   ARTICLE IV

                  Participants; Maximum Grant; Duration of Plan

         4.1 Eligibility and Participation. Options shall be granted only to
persons ("Participants") who at the time of granting are key executives or key
employees of the Company. Subject to the provisions of Section 4.3 hereof, the
Committees or the Board shall determine the key executives and key employees to
be granted options hereunder, the number of shares of Common Stock subject to
such options, the exercise prices of options, the terms thereof and any other
provisions not inconsistent with the Plan.

         4.2 Guidelines for Participation. In selecting Participants and
determining the numbers of shares of Common Stock for which options are to be
granted the Committees or the Board shall consult with officers and directors of
the Company, and shall take into account the duties of the respective employees,
their present and potential contributions to the success of the Company, and
such other factors as any of the Committees or the Board shall deem relevant.


                                       4
<PAGE>

         4.3 Maximum Grant. Notwithstanding anything to the contrary in the
Plan, the aggregate fair market value (determined as of the time the option is
granted) of the Common Stock for which any Participant may be granted options in
any calendar year (under all plans, including the Plan, providing for the grant
of incentive stock options of the Company and its parent and subsidiaries) shall
not exceed $100,000.

         4.4 Duration of Plan. All options under the Plan shall be granted
within ten years from the date the Plan is adopted, or the date the Plan is
approved by the shareholders of the Company, whichever is earlier.

                                    ARTICLE V

                         Terms and Conditions of Options

         5.1 Individual Stock Option Agreements. All stock options granted
pursuant to the Plan shall be evidenced by stock option agreements ("Stock
Option Agreements"), which need not be identical, between the Company and the
Participant in such form as any of the Committees or the Board shall from time
to time approve, subject to the terms of the Plan.

         5.2 Number of Shares. Each Stock Option Agreement shall state the total
number of shares of Common Stock with respect to which the option is granted,
the terms and conditions of the option, and the exercise price or prices
thereof, it being understood that any of the Committees or the Board shall have
authority to prescribe in any Stock Option Agreement that the option evidenced
thereby may be exercisable in full or in part, as to any number of shares
subject thereto, at any time or from time to time during the term of the option,
or in such


                                       5
<PAGE>

installments at such times during said term as any of the Committees or the
Board may determine; provided that no option granted pursuant to the Plan shall
be exercisable after the expiration of ten years from the date such option is
granted. A previously granted incentive stock option shall be treated as
outstanding until it is exercised in full or expires by reason of the lapse of
time. Except as otherwise provided in any Stock Option Agreement, an option may
be exercised at any time or from time to time during the term of the option as
to any or all full (but no fractional) shares which have become purchasable
under such option. Any of the Committees or the Board shall have the right to
accelerate, in whole or in part, from time to time, conditionally or
unconditionally, the right to exercise any option granted hereunder.

         5.3 Option Price. The price at which the shares of Common Stock subject
to each option granted under this Plan may be purchased (the "option price" or
"exercise price") shall be determined by any of the Committees or the Board,
which shall have authority at the time the option is granted to prescribe in any
Stock Option Agreement that the price per share, with the passage of
pre-determined periods of time, shall increase from the original price to higher
prices, but in no case shall the original exercise price of any option be less
than 100% of the fair market value of such shares on the date the option is
granted, as determined by any of the Committees or the Board in accordance with
applicable Treasury Regulations. Notwithstanding anything contained to the
contrary herein, no option shall be granted to any employee who, at the time the
option is granted, owns more than 10% of the total combined voting power of all
classes of stock of the Company or of its parent or subsidiary unless, at the
time option is granted, the exercise price of the option is at least 110% of the
fair market value of the shares of Common Stock


                                       6
<PAGE>

subject to the option and such option by its terms is not exercisable after the
expiration of five years from the date such option is granted. For purposes of
determining the ownership of stock of the Company, the rules of Section 424(d)
of the Code shall be applied.

         5.4 Method of Exercising Option; Full Payment. Subject to Section 6.1
and 6.2 hereof, options granted pursuant to the Plan may be exercised only if
the Participant was, at all times during the period beginning on the date the
option was granted and ending on the date of such exercise, an employee of the
Company, a parent or subsidiary of the Company, or a corporation or a parent or
subsidiary of such corporation issuing or assuming a stock option in respect of
such option in a transaction to which Section 424(a) of the Code applies.
Options shall be exercised by written notice to the Company, addressed to the
Company at its principal place of business. Such notice shall state the
Participant's election to exercise the option and the number of shares of Common
Stock in respect of which it is being exercised, and shall be signed by the
Participant so exercising the option. Such notice shall be accompanied by (a)
the Stock Option Agreement (which, if not exercised for all the shares thereto,
shall be appropriately endorsed and returned to the Participant; (b) payment of
the full purchase price of such shares, which payment shall be in cash, by check
or in stock of the Company that has been owned by the participant for at least
six months, or notes of the Company or, as agreed to by the Board, other
consideration; and (c) such written representations and other documents as may
be desirable, in the opinion of the Company's legal counsel, for purposes of
compliance with state or Federal securities or other laws. In the case of
payment made in stock of the Company, the stock shall be valued at its Fair
Market Value (as hereinafter defined) on the last business day prior to the date


                                       7
<PAGE>

of exercise. The term "Fair Market Value" for the Common Stock on any particular
date shall mean the last reported sale price of the Common Stock on the
principal market on which the Common Stock trades on such date or, if no trades
of Common Stock are made or reported on such date, then on the next preceding
date on which the Common Stock traded. The Company shall deliver a certificate
or certificates representing shares of Common Stock purchased pursuant to such
notice to the purchaser as soon as practicable after receipt of such notice,
subject to Article VIII hereof. Any of the Committees or the Board may amend an
already outstanding Stock Option Agreement to add a provision permitted by
clause (b) of this Section 5.4, and no such amendment, by itself, shall be
deemed to constitute the grant of a new option for purposes of this Plan;
provided that this sentence shall not be determinative of whether any such
amendment constitutes a new grant for purposes of qualification as an Incentive
Stock Option.

         5.5 Rights as a Shareholder. No Participant shall have any rights as a
shareholder with respect to shares of Common Stock subject to an option granted
under the Plan until the date of the issuance to such Participant of stock
certificates in respect of such shares. No adjustment shall be made for
dividends or other rights for which the record date is prior to the date such
stock certificate is issued.

         5.6 Other Provisions. Stock Option Agreements entered into pursuant to
the Plan may contain such other provisions (not inconsistent with the Plan) as
any of the Committees or the Board may deem necessary or desirable, including,
but not limited to, covenants on the part of the Participant not to compete, not
to sell Common Stock obtained from the exercise of


                                       8
<PAGE>

options for specified periods of time, and remedies available to the Company in
the event of the breach of any such covenant.

                                   ARTICLE VI

                   Termination of Employment; Transferability

         6.1 Termination of Employment. Except as otherwise provided in
connection with the grant of any option or the termination of any Participant,
the right to exercise any unexercised portion of any option granted under the
Plan shall terminate immediately upon termination of the employment relationship
between the Participant and the Company (or its parent or subsidiary, as the
case may be), for any reason, without regard to cause, other than by reason that
the Participant dies or becomes disabled (as defined in the Code). The option
may not be exercised thereafter, and the shares of Common Stock subject to the
unexercised portion of such option may again be subject to new options under the
Plan.

         6.2 Death or Disability of Participant. Except as otherwise permitted
in connection with the grant of any option or the death or disability of a
Participant, in the event a Participant dies or is disabled while in the employ
of the Company or of a parent or subsidiary of the Company, any options
theretofore granted to him shall be exercisable only within the next 12 months
immediately succeeding such death or disability and then only in the case of
death (a) by the person or persons to whom the Participant's rights under the
option shall pass by will or the laws of descent and distribution, and, in the
case of disability, by such Participant or his legal


                                       9
<PAGE>

representative, and (b) if and to the extent that he was entitled to exercise
the option at the date of his death.

         6.3 Transferability. Options granted to a Participant under the Plan
shall not be transferable otherwise than by will, by the laws of descent and
distribution, or (if authorized in the applicable Stock Option Agreement)
pursuant to a qualified domestic relations order ("QDRO") as defined by the
Internal Revenue Code of 1986, as amended, or Title I of the Employee Retirement
Income Security Act of 1974, as amended, or the rules thereunder. During the
Participant's lifetime, options shall be exercised only by such Participant,
such Participant's guardian or legal representative, or (if authorized in the
applicable Stock Option Agreement) such Participant's transferee pursuant to a
QDRO.

                                   ARTICLE VII

                               Capital Adjustments

         7.1 Capital Adjustments. If any change is made in the shares of Common
Stock subject to the Plan or subject to any option granted under the Plan
(through merger, consolidation, reorganization, recapitalization, stock
dividend, split-up, combination of shares, exchange of shares, issuance of
rights to subscribe, or change in capital structure), appropriate adjustments
shall be made by any of the Committees or the Board as to the maximum number of
shares subject to the Plan and the number of shares and price per share subject
to outstanding options as shall be equitable to prevent dilution or enlargement
of option rights; provided, however, that any such adjustment shall comply with
the rules of Section 424(a) of the Code and provided further


                                       10
<PAGE>

that in no event shall any adjustment be made that would cause any option
granted hereunder to be considered other than an incentive stock option. Any
determination made by any of the Committees or the Board under this Article VII
shall be final, binding and conclusive upon each Participant.

                                  ARTICLE VIII

                            Legal Requirements, Etc.

         8.1 Revenue Stamps. The Company shall be responsible and shall pay for
any transfer, revenue, or documentary stamps with respect to shares issued upon
the exercise of options granted under the Plan.

         8.2 Legal Requirements. The Company shall not be required to issue
certificates for shares upon the exercise of any option unless and until, in the
opinion of the Company's legal counsel, such issuance would not result in a
violation of any state or Federal securities or other law. Certificates for
shares, when issued, shall have, if required in the opinion of the Company's
legal counsel, the following legend, or statements of other restrictions,
endorsed thereon, and may not be immediately transferable:

         The shares of Common Stock evidenced by this certificate have been
         issued to the registered owner in reliance upon written representations
         that these shares have been purchased for investment. These shares may
         not be sold, transferred, or assigned unless, in the opinion of the
         Company and its legal counsel, such sales, transfer, or assignment will
         not be in violation of the Securities Act of 1933, as amended,
         applicable rules and regulations of the Securities and Exchange
         Commission and any applicable state Securities laws.


                                       11
<PAGE>

         8.3 Private Offering. The options to be granted under the Plan are
available only to a limited number of present and future key executives and
employees of the Company and its subsidiaries who have knowledge of the
Company's financial condition, management, and affairs. Such options are not
intended to provide additional capital for the Company but are to encourage
stock ownership by the Company's key personnel. By the act of accepting an
option, in the absence of an effective registration statement under the
Securities Act of 1933, as amended, Participants shall agree that upon exercise
of such option, they will acquire the shares of Common Stock that are the
subject thereof for investment and not with any intention at such time to resell
or redistribute the same, and they shall confirm such agreement at the time of
exercise, but the neglect or failure to confirm the same in writing shall not be
a limitation of such agreement.

                                   ARTICLE IX

                                     General

         9.1 Application of Funds. The proceeds received by the Company from the
sale of shares of Common Stock pursuant to the exercise of options therefor
shall be used for general corporate purposes.

         9.2 Right of the Company to Terminate Employment. Nothing contained in
the Plan or in a Stock Option Agreement shall confer upon any Participant any
right to be continued in the employ of the Company or of any subsidiary of the
Company, or interfere in any way with the


                                       12
<PAGE>

right of the Company, or such subsidiary, to terminate his employment for any
reason whatsoever, with or without cause, at any time.

         9.3 No Obligation to Exercise. The granting of an option hereunder
shall impose no obligation upon the Participant to exercise such option.

         9.4 Effectiveness of Plan. The Plan shall become effective upon its
adoption by the shareholders of the Company. Options may be granted under the
Plan prior to the approval of the Plan by the Shareholders, but no such option
may be exercised prior to such approval.

         9.5 Other  Benefits.  Participation  in the Plan  shall not  preclude a
Participant  from  eligibility in any other stock benefit plan of the Company or
any old age benefit, insurance,  pension, profit sharing,  retirement,  bonus or
other plan which the Company  has  adopted,  or may, at any time,  adopt for the
benefit of its parents' or its subsidiaries' executives and/or employees.

         9.6 Company Records. Records of the Company as to a Participant's
period of employment, termination of employment and the reason therefor, leaves
of absence, re-employment, and other matters will be conclusive for all purposes
hereunder.

         9.7 Tax Requirement. The exercise or surrender of any option under this
Plan shall constitute a Participant's full and complete consent to whatever
action the Committee elects to satisfy the Federal and state withholding
requirements, if any, which the Committee in its discretion deems applicable to
such exercise.

         9.8 Interpretations and Adjustments. To the extent permitted by law, an
interpretation of the Plan and a decision on any matter within any of the
Committees' or Board's discretion made in good faith is binding on all persons.
A misstatement or other mistake of fact shall be


                                       13
<PAGE>

corrected when it becomes known, and the person responsible shall make such
adjustment on account thereof as he considers equitable and practicable.

         9.9 Information. The Company shall, upon request or as may be
specifically required hereunder, furnish or cause to be furnished, all of the
information or documentation which is necessary or required by any of the
Committees or the Board to perform its duties and functions under the Plan.

         9.10 Notice of Disqualifying Disposition. If a Participant sells or
otherwise disposes of any share of Common Stock transferred to him pursuant to
the exercise of an option granted hereunder within two years from the date of
the granting of the option or within one year of the transfer of such shares to
him (i.e., a "disqualifying disposition"), the Participant, within ten days
thereafter, shall furnish to any of the Committees or the Board at the principal
offices of the Company, written notice of such sale or other disposition.

         9.11 Governing Law. The Plan and any and all options granted thereunder
shall be governed by, and construed and enforced in accordance with, the laws of
the State of New York from time to time in effect.

         9.12 Certain Definitions.

                  9.12.1 "Parent". The term "parent" shall mean a "parent
corporation" as defined in Section 424(e) of the Code.

                  9.12.2 "Subsidiary". The term "subsidiary" shall mean a
"subsidiary corporation" as defined in Section 424(f) of the Code.


                                       14
<PAGE>

                  9.12.3 "Incentive Stock Option". The term "incentive stock
option" shall mean an option described in Section 422(b) of the code.

                  9.12.4 "Disabled." The term "disabled" shall have the
definition set forth in Section 22(a)(3) of the Code.



<TABLE> <S> <C>


<ARTICLE>                     5
<MULTIPLIER>                                   1,000

<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                             DEC-31-1999
<PERIOD-START>                                APR-01-1999
<PERIOD-END>                                  JUN-30-1999
<CASH>                                              2,672
<SECURITIES>                                       38,006
<RECEIVABLES>                                           0
<ALLOWANCES>                                            0
<INVENTORY>                                             0
<CURRENT-ASSETS>                                   42,490
<PP&E>                                             26,836
<DEPRECIATION>                                    (13,742)
<TOTAL-ASSETS>                                     58,098
<CURRENT-LIABILITIES>                              21,176
<BONDS>                                             2,200
                                   0
                                           400
<COMMON>                                               25
<OTHER-SE>                                         32,711
<TOTAL-LIABILITY-AND-EQUITY>                       58,098
<SALES>                                                 0
<TOTAL-REVENUES>                                      254
<CGS>                                                   0
<TOTAL-COSTS>                                       8,826
<OTHER-EXPENSES>                                     (564)
<LOSS-PROVISION>                                        0
<INTEREST-EXPENSE>                                    123
<INCOME-PRETAX>                                    (8,131)
<INCOME-TAX>                                            0
<INCOME-CONTINUING>                                (8,131)
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<EXTRAORDINARY>                                         0
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<NET-INCOME>                                       (8,131)
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</TABLE>


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