CORVAS INTERNATIONAL INC
10-Q, 1998-05-14
PHARMACEUTICAL PREPARATIONS
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<PAGE>
                                       
                                  FORM 1O-Q

                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

(Mark One)

      /X/  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934
      For the quarterly period ended March 31, 1998
                                       
                                       OR

      / /  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 0-19732
                                       
                          CORVAS INTERNATIONAL, INC.
           (Exact name of Registrant as specified in its charter)

      DELAWARE                                                   33-0238812
(State or other jurisdiction                                 (I.R.S. Employer
of incorporation or organization)                           Identification No.)

                            3030 SCIENCE PARK ROAD
                         SAN DIEGO, CALIFORNIA 92121
            (Address of principal executive offices and zip code)

                                (619) 455-9800
             (Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act: None

Securities registered pursuant to Section 12(g) of the Act:

                        Common Stock, $0.001 par value
                                (Title of class)

     Indicate by check mark whether the Registrant (l) 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    
                   ---      ---

     At May 1, 1998, there were 14,039,493 shares of Common Stock, $0.001 par 
value, of the Registrant issued and outstanding.

<PAGE>

                                       
                          CORVAS INTERNATIONAL, INC.

                                    INDEX


<TABLE>
<CAPTION>
                                                                       Page
<S>                                                                    <C>
                   PART I  FINANCIAL INFORMATION

Item 1   Financial Statements

         Condensed Balance Sheets as of March 31, 1998 and
         December 31, 1997                                                1

         Condensed Statements of Operations for the Three Months
         Ended March 31, 1998 and 1997                                    2

         Condensed Statements of Cash Flows for the Three Months
         Ended March 31, 1998 and 1997                                    3

         Notes to Condensed Financial Statements                          4

Item 2   Management's Discussion and Analysis of Financial
         Condition and Results of Operations                              5

Item 3   Quantitative and Qualitative Disclosures About Market Risk       8

                      PART II   OTHER INFORMATION

Item 1   Legal Proceedings                                                9

Item 2   Changes in Securities                                            9
              None

Item 3   Defaults Upon Senior Securities                                  9
              None

Item 4   Submission of Matters to a Vote of Security Holders              9
              None                                                         

Item 5   Other Information                                                9
              None

Item 6   Exhibits and Reports on Form 8-K                                
         (a)  Exhibits                                                    9
           
         (b)  Reports on Form 8-K                                         9
              None

SIGNATURES                                                               10
</TABLE>


<PAGE>
                                       
                         PART I -- FINANCIAL INFORMATION
                                       
Item 1.   FINANCIAL STATEMENTS
                                       
                           CORVAS INTERNATIONAL, INC.
                            CONDENSED BALANCE SHEETS      
                                 (In thousands)
                                 
<TABLE>
<CAPTION>
                                                   March 31, 1998     December 31, 1997
                                                   --------------     -----------------
                                                    (unaudited)
<S>                                                <C>                <C>
ASSETS
Current assets:
 Cash and cash equivalents                            $  1,441             $  2,044 
 Short-term debt securities held to maturity                                        
  and time deposits, partially restricted               21,292               24,076 
 Receivables                                             1,102                  289 
 Notes receivable from related parties                     153                  153 
 Other current assets                                      499                  340 
                                                      --------             --------
    Total current assets                                24,487               26,902 
Property and equipment, net                              1,560                1,312 
                                                      --------             --------
                                                      $ 26,047             $ 28,214 
                                                      --------             --------
                                                      --------             --------

LIABILITIES AND STOCKHOLDERS' EQUITY                                                
Current liabilities:                                                                
 Accounts payable                                     $    435             $    299 
 Accrued expenses                                          827                  623 
 Accrued vacation                                          226                  191 
 Deferred revenue                                        3,263                4,656 
                                                      --------             --------
    Total current liabilities                            4,751                5,769 
                                                      --------             --------
Stockholders' equity:
 Preferred stock - Series A                                  1                    1 
 Preferred stock - Series B                                  0                    0 
 Common stock                                               14                   14 
 Additional paid-in capital                             92,347               92,179 
 Accumulated deficit                                   (71,066)             (69,749)
                                                      --------             --------
    Total stockholders' equity                          21,296               22,445 
Commitments and contingencies
                                                      --------             --------
                                                      $ 26,047             $ 28,214 
                                                      --------             --------
                                                      --------             --------
</TABLE>
                                                  
See accompanying notes to condensed financial statements.
                                                      

                                       1


<PAGE>
                                       
                          CORVAS INTERNATIONAL, INC.

                      CONDENSED STATEMENTS OF OPERATIONS
              In thousands, except per share amounts (unaudited)


<TABLE>
<CAPTION>
                                                              Three Months Ended
                                                                    March 31,
                                                           ------------------------
                                                             1998             1997
<S>                                                        <C>              <C>
REVENUES:
    Revenue from collaborative agreements                  $ 1,746          $ 1,075
    License fees and milestones                              1,000            3,850
    Net product sales                                           34               10
    Royalties                                                   43               36
                                                           -------          -------
      Total revenues                                         2,823            4,971
                                                           -------          -------

COSTS AND EXPENSES:
    Research and development                                 3,584            2,349
    General and administrative                                 866              848
    Cost of products sold                                       17                4
                                                           -------          -------
      Total costs and expenses                               4,467            3,201
                                                           -------          -------
     
      Income (loss) from operations                         (1,644)           1,770
                                                           -------          -------

OTHER INCOME:
    Interest income, net                                       322              388
    Other income                                                 5                0
                                                           -------          -------
                                                               327              388
                                                           -------          -------

      Net income (loss)                                    $(1,317)         $ 2,158
                                                           -------          -------
                                                           -------          -------

      Basic net income (loss) per share                    $ (0.09)         $  0.15
                                                           -------          -------
                                                           -------          -------

      Shares used in calculation of basic net 
       income (loss) per share                              13,972           14,147
                                                           -------          -------
                                                           -------          -------

      Diluted net income (loss) per share                  $ (0.09)         $  0.14
                                                           -------          -------
                                                           -------          -------

      Shares used in calculation of diluted net  
       income (loss) per share                              13,972           15,397
                                                           -------          -------
                                                           -------          -------
</TABLE>

See accompanying notes to condensed financial statements.

                                       2

<PAGE>
                                       
                          CORVAS INTERNATIONAL, INC.

                      CONDENSED STATEMENTS OF CASH FLOWS
                          IN THOUSANDS (UNAUDITED)

<TABLE>
<CAPTION>
                                                                    Three Months Ended
                                                                          March 31,
                                                                 ------------------------
                                                                   1998             1997
<S>                                                              <C>              <C>
Cash flows from operating activities:
  Net income (loss)                                              $ (1,317)      $  2,158
  Adjustments to reconcile net income (loss) to
   net cash used in operating activities:
     Depreciation and amortization                                    151            157
     Amortization of premiums and discounts on investments           (260)          (159)
     Stock compensation expense                                        25              0
     Change in assets and liabilities:
       Increase in receivables                                       (813)          (774)
       Increase in other current assets                              (159)          (564)
       Increase in accounts payable, accrued 
         expenses and accrued vacation                                375             63
       Decrease in deferred revenue                                (1,393)        (1,000)
                                                                 --------       --------

         Net cash used in operating activities                     (3,391)          (119)


Cash flows from investing activities:
  Purchases of investments held to maturity                       (13,251)       (22,677)
  Proceeds from maturity of investments held to maturity           16,295         20,985
  Purchases of property and equipment                                (480)          (173)
  Proceeds from sale of property and equipment                         81              0
                                                                 --------       --------

         Net cash provided by (used in) investing activities        2,645         (1,865)
                                                                 --------       --------

Cash flows from financing activities:
  Principal payments under capital lease obligation                     0            (20)
  Net proceeds from issuance of common stock                          143            195
                                                                 --------       --------

         Net cash provided by financing activities                    143            175
                                                                 --------       --------


Net decrease in cash and cash equivalents                            (603)        (1,809)

Cash and cash equivalents at beginning of period                    2,044          2,202
                                                                 --------       --------

Cash and cash equivalents at end of period                       $  1,441       $    393
                                                                 --------       --------
                                                                 --------       --------
</TABLE>


See accompanying notes to condensed financial statements.


                                       3

<PAGE>

                          CORVAS INTERNATIONAL, INC.
                                       
                   NOTES TO CONDENSED FINANCIAL STATEMENTS
                                 (UNAUDITED)

(1)  THE COMPANY

     Corvas International, Inc. (the "Company") was incorporated on March 27, 
1987 under the laws of the State of California.  In July 1993, the Company 
reincorporated in the State of Delaware.  The Company is engaged in the 
design and development of a new generation of therapeutic agents in the 
fields of blood clot formation (thrombosis), inflammation, cancer and other 
diseases.

(2)  BASIS OF PRESENTATION

     The interim financial information contained herein is unaudited but, in 
management's opinion, includes all adjustments, consisting only of normal 
recurring adjustments, necessary for a fair presentation.  The financial 
statements should be read in conjunction with the Company's audited financial 
statements and notes thereto for the year ended December 31, 1997.  Results 
for the interim periods are not necessarily indicative of results for other 
interim periods or for the full year.

(3)  NET INCOME (LOSS) PER SHARE

     Pursuant to Statement of Financial Accounting Standards No. 128, 
"Earnings per Share" ("SFAS 128"), financial statements for periods ending 
after December 15, 1997 must reflect basic and diluted income (loss) per 
share as defined. Accordingly, basic income (loss) has been computed based 
upon the weighted average common stock outstanding during the period and 
diluted income (loss) per share has been computed based upon the weighted 
average number of shares outstanding during the period plus the dilutive 
effects of common stock equivalents.  Common stock equivalents have been 
calculated under the treasury stock method and are not included in the per 
share calculations where the effect of their inclusion would be 
anti-dilutive.  Basic and diluted income (loss) per share have been 
calculated as follows in thousands:

<TABLE>
<CAPTION>
                                         For the three months ended               For the three months ended 
                                                March 31, 1998                           March 31, 1997
                                   --------------------------------------   -------------------------------------
                                                   Weighted                                Weighted
                                    Earnings    Average Shares  Per Share     Earnings  Average Shares  Per Share
                                   (Numerator)   (Denominator)    Amount    (Numerator)  (Denominator)    Amount
                                   -----------  --------------  ---------   ----------- --------------  ---------
<S>                                <C>          <C>             <C>         <C>         <C>             <C>
Basic Income (Loss) Per Share:
  Net Income (Loss)                 $(1,317)         13,972       $(0.09)      $2,158        14,147       $0.15

Effect of Dilutive Securities                           0                                     1,250

Diluted Income (Loss) Per Share:
  Net Income (Loss) available to
  common stockholders plus
                                    -------           ------      ------       ------        ------       -----
  common stock equivalents          $(1,317)          13,972      $(0.09)      $2,158        15,397       $0.14
                                    -------           ------      ------       ------        ------       -----
                                    -------           ------      ------       ------        ------       -----
</TABLE>

(4)  COMPREHENSIVE INCOME

     As of January 1, 1998, the Company adopted Statement of Financial 
Accounting Standards No. 130, "Reporting Comprehensive Income" ("SFAS 130"). 
SFAS 130 established standards for reporting and display of comprehensive 
income and its components in a full set of general-purpose financial 
statements.  The adoption of SFAS 130 did not have a significant impact since 
the Company's net income/(loss) approximates comprehensive income/(loss) for 
the three month periods ended March 31, 1998 and 1997.


                                       4


<PAGE>

Item 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
         AND RESULTS OF OPERATIONS
           
     EXCEPT FOR THE HISTORICAL INFORMATION CONTAINED HEREIN, THE FOLLOWING 
DISCUSSION CONTAINS FORWARD-LOOKING STATEMENTS THAT INVOLVE RISKS AND 
UNCERTAINTIES.  THE COMPANY'S ACTUAL RESULTS COULD DIFFER MATERIALLY FROM 
THOSE PROJECTED IN THE FORWARD-LOOKING STATEMENTS.  FACTORS THAT COULD CAUSE 
OR CONTRIBUTE TO SUCH DIFFERENCES INCLUDE, BUT ARE NOT LIMITED TO, THOSE 
DISCUSSED IN THE COMPANY'S ANNUAL REPORT ON FORM 10-K.

OVERVIEW

     Formed in 1987, Corvas International, Inc. (the "Company") is a 
biopharmaceutical firm engaged in the design and development of a new 
generation of therapeutic agents in the fields of blood clot formation 
(thrombosis), inflammation, cancer and other diseases.  To date, the Company 
has not generated significant revenues from product sales.  The Company has 
not been profitable on an annual basis since inception and expects to incur 
substantial additional operating losses on an annual basis over the next 
several years as the Company expands its research and development programs.  
There is no assurance that the Company will successfully develop, 
commercialize, manufacture or market its products or generate sufficient 
revenues to become profitable on a sustained basis or at all.  At March 31, 
1998, the Company had an accumulated deficit of $71,066,000.

RESULTS OF OPERATIONS

THREE MONTHS ENDED MARCH 31, 1998 AND 1997

     Operating revenues decreased from $4,971,000 for the three months ended 
March 31, 1997 to $2,823,000 in the corresponding period of 1998.   This 
$2,148,000 decrease was primarily due to a $2,850,000 decrease in license 
fees and milestones, which was partially offset by a $671,000 increase in 
revenue from collaborative agreements.  In the first quarter of 1998, revenue 
from collaborative agreements consisted of (i) $1,000,000 attributable to the 
Company's strategic alliance agreement with Schering Corporation 
("Schering-Plough") to collaborate on the discovery and commercialization of 
orally active inhibitors of coagulation Factor Xa, (ii) $394,000 related to a 
separate agreement with Schering-Plough regarding the design and development 
of oral inhibitors of a key protease necessary for hepatitis C virus 
replication, (iii) $240,000 recognized pursuant to a research and development 
agreement with Vascular Genomics Inc. ("VGI") covering a novel vascular 
targeting technology, and (iv) $112,000 attributable to the Company's license 
and development agreement with Pfizer Inc. ("Pfizer") to collaborate on the 
development of neutrophil inhibitory factor ("NIF").  The first quarter of 
1998 also included license fees and milestones of $1,000,000, as a result of 
a milestone achieved upon Pfizer's commencement of a Phase I clinical trial 
of NIF.  The remaining revenues in the first quarter of 1998 of $77,000 were 
attributable to royalties and product sales.  The Company discontinued its 
manufacturing operations, and expects to complete the previously-disclosed 
transaction with Ortho-Clinical Diagnostics Inc. ("Ortho"), a Johnson & 
Johnson company, in 1998.  Revenue from collaborative agreements in the first 
quarter of 1997 included (i) $1,000,000 attributable to the Schering-Plough 
collaboration regarding inhibitors of coagulation Factor Xa and (ii) $75,000 
recognized pursuant to the NIF collaboration with Pfizer.  License fees and 
milestones in the first quarter of 1997 consisted of (i) a $3,000,000 
milestone achieved upon selection of a clinical development compound in the 
Company's strategic alliance agreement with Schering-Plough to develop orally 
active thrombin inhibitors and (ii) $850,000 pursuant to the Pfizer 
collaboration.


                                       5

<PAGE>

     Total costs and expenses incurred in the first quarter increased from 
$3,201,000 in 1997 to $4,467,000 in 1998.  This $1,266,000 increase is 
primarily due to increased research and development expenditures.  The 
majority of this increase relates to the manufacture of clinical supplies for 
NAP5 and the Company's conduct of clinical studies of NAPc2.  General and 
administrative expenditures increased only slightly comparing the first 
quarters of 1997 and 1998.    

     Total other income decreased from $388,000 in the first quarter of 1997 
to $327,000 in the same period one year later.  Decreased cash balances 
available for investment caused interest income to decrease by $66,000.

     Subject to the availability of additional capital, the Company expects 
its expenses to increase over the next several years as the Company's 
research and development programs progress.  The Company also expect both its 
expenses and losses to fluctuate from quarter to quarter and that such 
fluctuations may, at times, be substantial.
 
LIQUIDITY AND CAPITAL RESOURCES

     Since inception, the Company's operations have been funded primarily 
through public offerings and private placements of equity securities, 
revenues and milestones from collaborative agreements, license fees and 
research grants, and interest income earned on cash and investment balances. 
The Company's principal sources of liquidity are its cash and cash 
equivalents, time deposits and debt securities which, net of a restricted 
time deposit, totaled $22,673,000 as of March 31, 1998. Working capital at 
March 31, 1998 was $19,736,000. Available cash is invested in accordance with 
an investment policy set by the Board of Directors, which has the objectives 
to preserve principal, maintain adequate liquidity and maximize income.  The 
policy provides guidelines concerning the quality, term and liquidity of 
investments.  The Company presently invests its excess cash in 
interest-bearing, investment-grade securities.

     Net cash used in operations was $3,391,000 in the three months ended 
March 31, 1998, compared to $119,000 for the same period one year earlier.  
This was due to increased cash usage and a decrease in operating revenues in 
1998, mainly as a result of a $3,000,000 milestone payment received from 
Schering-Plough in the first quarter of 1997.  In the three months ended 
March 31, 1998, net cash of $2,645,000 was provided by investing activities, 
compared to net cash of $1,865,000 used in investing activities in the 
corresponding quarter of 1997.  This was attributable to the usage of 
investment maturities to fund ongoing operations in 1998.  Net cash provided 
by financing activities decreased slightly from $175,000 in the first quarter 
of 1997 to $143,000 in the first quarter of 1998.  This was attributable to 
the exercise of fewer stock options in this quarter of 1998 compared to 1997.

     The Company expects to incur substantial additional costs in the 
foreseeable future, including costs related to clinical and preclinical 
studies and expanding its research and development activities.  The Company 
expects such costs to continue to increase and, as a result, expects to 
experience substantial additional operating losses and negative cash flows 
from operations over the next several years.  In particular, increased costs 
are anticipated as the clinical development of NAPc2 continues, including a 
Phase II trial planned to commence in the second half of 1998.  The Company 
believes its existing capital resources and interest earned thereon should be 
sufficient to satisfy its anticipated funding requirements for at least the 
next 12 months.  In addition, the Company may also receive additional funds 
through milestone payments and royalties on sales of products in connection 
with its alliances. However, there is no assurance that the Company will 
receive any additional amounts under existing or any future alliances.


                                       6

<PAGE>

     Strategic collaborations with Schering-Plough and Pfizer provide for 
payments to the Company if and when certain milestones are met.  However, 
there is no assurance that any future milestones will be achieved.  In the 
quarter ended March 31, 1998, Pfizer commenced a clinical trial for NIF which 
triggered a $1,000,000 milestone payment.  The next milestone in the 
collaboration with Schering-Plough covering thrombin inhibitors is $1,000,000 
to be paid upon  filing by Schering-Plough of an Investigational New Drug 
Application ("IND"), or its foreign equivalent, for initiating clinical 
trials in the U.S. or in any corresponding foreign jurisdiction.   In the 
Company's collaboration with Schering-Plough covering inhibitors of the 
hepatitis C virus, the next milestone is a $500,000 payment upon 
identification of an initial lead compound in this program.  In addition to 
these milestones, the Company may also receive additional milestone payments 
and royalties on sales of products in connection with its existing alliances, 
as well as from any future alliances.  If all of the milestones on all of the 
Company's existing collaborations are met, Corvas could receive up to a total 
of $97,050,000 in future milestone payments and research and development 
funding over the next several years.  However, there is no assurance that the 
Company will achieve any such milestones or receive any such amounts under 
these or any future alliances.

     In June 1997, the Company entered into an option agreement to acquire 
all of the outstanding stock of VGI, a vascular targeting company.  If this 
option is exercised prior to its termination on June 30, 2000, the 
acquisition will be made with newly-issued Corvas Common Stock or, in certain 
circumstances at the option of the Company, a combination of cash and 633,600 
shares of Common Stock.  The aggregate acquisition price, which is based on 
the timing of option exercise, ranges from a minimum of $14,352,000 as of 
March 31, 1998 to a maximum of $19,960,000.  If this option is exercised, the 
Company expects a noncash charge to earnings for in-process research and 
development. If Corvas elects not to exercise its option, VGI may require the 
Company to purchase 19.9% of its outstanding stock for $3,960,000 in Corvas 
Common Stock. During the option period, Corvas will make monthly option 
payments of approximately $83,000 to VGI.  In addition, under a research and 
development agreement, VGI is required to make monthly payments of $80,000 to 
Corvas to be applied to research and development covering the VGI technology. 
 Although the net impact of these payments is not material, the Company may 
incur substantial additional costs to develop this technology.  Corvas may 
enter into one or more collaborative relationships to develop and 
commercialize this technology. However, there is no assurance that the 
Company will be able to establish such relationships on satisfactory terms, 
that such relationships will successfully reduce the costs associated with 
research and development of this technology, that the option will be 
exercised, or that this technology will prove to be effective.

     Future capital requirements of the Company will depend on many factors, 
including, but not limited to, the following: continued scientific progress 
in its drug discovery programs; the magnitude of these programs; the progress 
of preclinical testing and clinical trials; the costs involved in obtaining 
regulatory approvals; the costs involved in filing, prosecuting, maintaining 
and enforcing patent claims; competing technological and market developments; 
changes in its existing research relationships; the ability of the Company to 
establish and to maintain collaborative or licensing arrangements; the cost 
of manufacturing scale-up; and the effectiveness of activities and 
arrangements to commercialize existing and potential products.  The Company 
leases its laboratory and office facilities  under an operating lease and 
anticipates that it will need to expand its facilities over the next several 
years.


                                      7

<PAGE>

     To continue its long-term product development efforts, the Company must 
raise substantial additional funds through public or private sales of 
securities, collaborative arrangements or other methods of financing.  The 
Company's ability to raise additional funds through such sales of securities 
depends in part on investors' perceptions of the biotechnology industry, in 
general, and of the Company, in particular.  The market for biotechnology 
company stocks has historically been highly volatile and, accordingly, there 
is no assurance that additional funding will be available, or, if available, 
that it will be available on acceptable terms.  If additional funds are 
raised by issuing securities, further dilution to stockholders will likely 
result.  The Company may enter into additional collaborative relationships to 
develop and commercialize certain of its current or future technologies or 
products.  There is no assurance that the Company will be able to establish 
such relationships on satisfactory terms, if at all, or that agreements with 
collaborators will successfully reduce the Company's funding requirements.  
In addition, the Company has not attempted to  establish bank financing 
arrangements, and there is no assurance that it would be able to establish 
such arrangements on satisfactory terms, if at all.  If adequate funds are 
not available, the Company may be required to significantly delay, scale back 
or discontinue one or more of its drug discovery programs or other aspects of 
its operations, or obtain funds through arrangements with collaborative 
partners or others that may require the Company to relinquish rights to 
certain of its technologies, product candidates or products that the Company 
would not otherwise relinquish or at prices below that at which the Company 
would otherwise choose to relinquish such rights.

     In 1993, the U.S. Patent and Trademark Office (the "USPTO") declared an 
interference to determine the priority of invention between a patent for 
which some rights are licensed to the Company (the "Licensed Patent") and a 
patent application for which rights are held by other parties (the "First 
Patent Application").  In 1996, the USPTO added a second patent application 
to the proceeding (the "Second Patent Application") and redeclared the 
interference. Rights to the Second Patent Application are held by other 
parties, at least some of which also hold rights in the First Patent 
Application.  The subject matter of the patent and these applications is 
recombinant tissue factor, which is used by Ortho to determine the blood 
clotting abilities of patients.  The Company is contesting the other parties' 
claims of prior invention; however, there can be no assurance that the 
Licensed Patent will be upheld.

Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

     Not applicable


                                       8

<PAGE>

                         PART II -- OTHER INFORMATION


Item 1.  LEGAL PROCEEDINGS

     In 1993, the U.S. Patent and Trademark Office (the "USPTO") declared an 
interference to determine the priority of invention between a patent for 
which some rights are licensed to the Company (the "Licensed Patent") and a 
patent application for which rights are held by other parties (the "First 
Patent Application").  In 1996, the USPTO added a second patent application 
to the proceeding (the "Second Patent Application") and redeclared the 
interference. Rights to the Second Patent Application are held by other 
parties, at least some of which also hold rights in the First Patent 
Application.  The subject matter of the patent and these applications is 
recombinant tissue factor, which is used by Ortho-Clinical Diagnostics Inc. 
("Ortho"), a Johnson & Johnson company,  to determine the blood clotting 
abilities of patients.  The Company is contesting the other parties' claims 
of prior invention; however, there can be no assurance that the Licensed 
Patent will be upheld. 

Item 2.  CHANGES IN SECURITIES

     None

Item 3.  DEFAULTS UPON SENIOR SECURITIES

     None

Item 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

     None

Item 5.  OTHER INFORMATION

     None

Item 6.  EXHIBITS AND REPORTS ON FORM 8-K

     a.  Exhibits

<TABLE>
<CAPTION>
     Exhibit Number         Description
     --------------         -----------
     <S>                    <C>
         10.63              Letter of Agreement between the Company and 
                            Schering Corporation and Schering-Plough Ltd., 
                            dated as of April 27, 1998.

         10.64              Eleventh Amendment to Lease, dated as of 
                            April 23, 1998. 

         27.1               Financial Data Schedule
</TABLE>

     b.  Reports on Form 8-K

     There were no reports on Form 8-K filed for the quarter ended March 31, 
1998.


                                       9

<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.

                                     CORVAS INTERNATIONAL, INC.



Date: May 12, 1998                   By: /s/ RANDALL E. WOODS
                                         ------------------------------------
                                         Randall E. Woods
                                         President and Chief Executive Officer




Date: May 12, 1998                   By:  /s/ CAROLYN M. FELZER
                                         ------------------------------------
                                         Carolyn M. Felzer
                                         Senior Director of Finance
                                         Principal Financial Officer


                                       10

<PAGE>

                                                                  EXHIBIT 10.63

[LETTERHEAD OF SCHERING CORPORATION]
                              
                                                                 April 16, 1998

Mr. Randall E. Woods
President and Chief Executive Officer
Corvas International, Inc.
3030 Science Park Road
San Diego, California 92121
                                      ***Text Omitted and Filed Separately
                                         Confidential Treatment Requested
                                         Under 17 C.F.R. section 200.80 (b)(4),
                                         200.83 and 200.24b-2

cc:  Jonathan Spicehandler, M.D.
     Cecil B. Pickett, Ph.D.
     Ashit K. Ganguly, Ph.D.
     Corporate Secretary, Corvas International
     Brian C. Cunnigham, Esq., Cooley Godward LLP

RE:  HCV Research Program

Dear Mr. Woods:

     This is in reference to the License and Collaboration Agreement by and 
between Corvas International, Inc. (hereinafter "Corvas") and Schering 
Corporation and Schering-Plough Ltd. (hereinafter collectively called 
"Schering"), effective as of June 11, 1997, including the Exhibits thereto 
(the "Agreement").

     This Letter of Agreement serves to set forth the terms under which the 
parties have agreed to extend the Research Program Term for an additional 
period of one (1) year (the "Extension Year"), to expire two (2) years from 
the Effective Date of the Agreement.

     In accordance with Section 2.3 of the Agreement, the Research Committee 
has agreed that Schering will provide research funding to support [***] FTEs 
at the rate of [***] per FTE during the Extension Year.  The total of 
Schering's research funding obligation under the Agreement during the 
Extension Year is therefore [***], which obligation shall be equally 
apportioned between Schering Corporation and Schering-Plough Ltd., and shall 
be payable in four quarterly installments due on the first business day of 
each calendar quarter during the Extension Year (i.e., on July 1, 1998, 
October 1, 1998, January 1, 1999, and April 1, 1999).

*** CONFIDENTIAL TREATMENT REQUESTED<PAGE>


<PAGE>

Mr. Randall E. Woods                                          April 16, 1998


     Except as expressly amended and supplemented hereby, all other terms of 
the Agreement shall remain in full force and effect.

     We at Schering look forward to continued success in our collaborative 
research efforts under the Agreement.

     Please indicate your acceptance and agreement to the provisions set 
forth in this Letter of Agreement by signing below on behalf of Corvas and 
returning one signed original to Schering.

          Very truly yours,

          Schering Corporation               Schering-Plough Ltd.


          /s/ DAVID POORVIN, PH.D.           /s/ DAVID POORVIN, PH.D.
          ------------------------           ------------------------
          David Poorvin, Ph.D.               David Poorvin, Ph.D.
          Vice President                     Prokurist


Acknowledged and Agreed to
Corvas International, Inc.

By:  /s/ RANDALL E. WOODS
     ----------------------
Date:  April 27, 1998

<PAGE>

                                                                 EXHIBIT 10.64

                         ELEVENTH AMENDMENT TO LEASE


     This Eleventh Amendment to that certain Lease (this "Eleventh 
Amendment") dated as of the 23 day of April, 1998, between HUB PROPERTIES 
TRUST, a Maryland real estate investment trust ("LANDLORD") and Corvas 
International, Inc., a Delaware corporation ("TENANT").

     WHEREAS, Hartford Accident and Indemnity Company (the "ORIGINAL 
LANDLORD") and Corvas, Inc. (the "ORIGINAL TENANT) entered into a certain 
lease dated March 28, 1989 of a portion of the premises located at 3030 
Science Park Road, San Diego, California, as amended by certain Lease 
Amendments dated March 23, 1990 and May 18, 1990; and

     WHEREAS, Corvas International, Inc., a California corporation ("CORVAS") 
succeeded to the interests of Original Tenant as set forth in Consent to 
Assignment of Lease dated March 13 1991; and

     WHEREAS, Original Landlord and Corvas entered into a Third Lease 
Amendment dated May 16, 1991; Fourth Lease Amendment dated January 21, 1992; 
Fifth Lease Amendment dated April 15, 1992; Sixth Lease Amendment dated July 
16, 1992; and Seventh Lease Amendment dated January 18, 1993; and

     WHEREAS, Tenant succeeded to the interests of Corvas as set forth in 
Consent to Assignment of Lease dated September 14, 1993; and

     WHEREAS, Talcott Realty I Limited Partnership succeeded to the interests 
of Original Landlord; and

     WHEREAS, Talcott and Tenant entered into an Eighth Lease Amendment dated 
July 7, 1995 and a Ninth Lease Amendment dated March 15, 1996; and

     WHEREAS, Landlord succeeded to the interests of Talcott as set forth in 
Assignment and Assumption of Leases, Contracts and Other Property Interests 
dated December 5, 1996; and

     WHEREAS, Landlord and Tenant entered into a Tenth Amendment to Lease 
dated May 12, 1997; and

     WHEREAS, for purposes of this Eleventh Amendment, the above-referenced 
lease dated March 28, 1989 as amended on March 23, 1990; May 18, 1990; May 
16, 1991; January 21, 1992; April 15, 1992; July 16, 1992; January 18, 1993; 
July 7, 1995; March 15, 1996 and May 12, 1997 shall be hereinafter defined 
collectively as "the LEASE"; and

     WHEREAS, Tenant wishes to exercise its final option to extend the term 
of the Lease and Landlord is willing to agree to such extension upon the 
terms and conditions hereinafter set forth.

     NOW, THEREFORE, in consideration of the foregoing and for other 
consideration, the receipt and sufficiency of which are hereby mutually 
acknowledged, Landlord and Tenant agree that the Lease is hereby amended as 
follows:

     1.   The definition of "TERMINATION DATE" as set forth in Section II.E. 
of the Lease shall be amended by deleting the date "September 30, 1998" 
therefrom and inserting the date of "September 30, 1999" in its place.


<PAGE>

     2.   The definition of "BASE RENT" as set forth in Section II.G of the
Lease shall be amended by inserting the following at the end thereof:  

     "10/01/98-09/30/99, $1,005,934.48."

     3.   The definition of "MONTHLY INSTALLMENTS OF BASE RENT" set forth in 
Section II.H. of the Lease shall be amended by inserting the following at the 
end thereof: 

     "10/01/98-09/30/99, $83,827.87."

     4.   Section II.F is hereby deleted in its entirety.

     5.   Section II.W.a. (a) of the Lease shall be amended by inserting the
following at the end thereof:

     "10/01/98-09/30/99, $33.34."

     6.   Tenant  warrants and represents that it has dealt with no broker in 
connection with the execution of this Eleventh Amendment and agrees to 
indemnify Landlord and hold it harmless from and against any and all 
brokerage claims arising therefrom.

     7.   Except as herein specifically amended, this Lease is hereby 
ratified and confirmed.

     IN WITNESS WHEREOF, the parties have hereto executed this Eleventh 
Amendment the date first above-written.

                                     LANDLORD:

                                     HUB PROPERTIES TRUST,
                                     a Maryland real estate investment trust


                                     By:  /s/ DAVID J. HEGARTY
                                          -------------------------------
                                          Name: David J. Hegarty
                                          Its:  President


                                     TENANT:

                                     CORVAS INTERNATIONAL, INC.,
                                     a Delaware corporation


                                     By:  /s/ RANDALL E. WOODS
                                          -------------------------------
                                          Name: Randall E. Woods
                                          Its: President & CEO

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               MAR-31-1998
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<SECURITIES>                                    21,292
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                                0
                                          1
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