GUILFORD PHARMACEUTICALS INC
10-Q, 1997-11-12
PHARMACEUTICAL PREPARATIONS
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

                                   FORM 10-Q

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

               FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 1997
                                              ------------------

                         COMMISSION FILE NUMBER 0-23736
                                                -------

                         GUILFORD PHARMACEUTICALS INC.
             (Exact name of registrant as specified in its charter)




- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
          DELAWARE                                           52-1841960
(State or other jurisdiction of                             (IRS Employer
incorporation or organization)                           Identification No.)

- --------------------------------------------------------------------------------
      6611 TRIBUTARY STREET, BALTIMORE, MARYLAND                21224
(Address of principal executive offices)                     (Zip Code)

- --------------------------------------------------------------------------------
                                410-631-6300
            (Registrant's telephone number, including area code)



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

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

          Class                          Outstanding at November 10, 1997
                               
Common Stock, $.01 par value                          19,366,320         
- ----------------------------             --------------------------------

<PAGE>   2
                         GUILFORD PHARMACEUTICALS INC.
                                AND SUBSIDIARIES





                                     INDEX

<TABLE>
<CAPTION>
                                                                             Page (s)
                                                                             ----    
<S>       <C>                                                                 <C>
PART I.   FINANCIAL INFORMATION (UNAUDITED)

          Item 1.   Financial Statements

                    Consolidated Balance Sheets
                    September 30, 1997 and December 31, 1996                  3

                    Consolidated Statements of Operations
                    Three and nine months ended September 30,
                    1997 and 1996                                             4

                    Consolidated Statement of Stockholders' Equity
                    Nine months ended September 30, 1997                      5

                    Consolidated Statements of Cash Flows
                    Three and nine months ended September 30,
                    1997 and 1996                                             6

                    Notes to Consolidated Financial Statements                7-10

          Item 2.   Management's Discussion and Analysis of Financial
                    Condition and Results of Operations                       11-18

          Item 3.   Quantitative and Qualitative Disclosures About
                    Market Risk                                               18

PART II.  OTHER INFORMATION                                                   19-20

          SIGNATURES                                                          21
</TABLE>
<PAGE>   3
                        GUILFORD PHARMACEUTICALS INC.
                               AND SUBSIDIARIES


                         CONSOLIDATED BALANCE SHEETS
                      (IN THOUSANDS, EXCEPT SHARE DATA)


<TABLE>
<CAPTION>
                                                                      SEPTEMBER 30, 1997
                                                                          (UNAUDITED)       DECEMBER 31, 1996
                                                                      -------------------  --------------------
<S>                                                                     <C>                  <C>
                                ASSETS
                                ------
Current assets:
    Cash and cash equivalents                                           $        7,719       $      16,560
    Short-term investments                                                      55,575              20,097
    Short-term investments - restricted                                          2,687               1,608
    Accounts receivable                                                            629                 376
    Stock subscription receivable                                               20,000                   -
    Inventories                                                                  1,253               1,533
    Other current assets                                                         1,145                 435
                                                                       ----------------     ---------------
                         Total current assets                                   89,008              40,609
Investments                                                                     68,963              30,653
Investments - restricted                                                         9,878               8,521
Property and equipment, net                                                     15,073              13,455
Other assets                                                                       310                 421
                                                                       ----------------     ---------------
                                                                        $      183,232       $      93,659
                                                                       ================     ===============

                 LIABILITIES AND STOCKHOLDERS' EQUITY
                 ------------------------------------
Current liabilities:
   Accounts payable                                                     $        1,663       $       2,038
   Bond payable - current portion                                                  941                 941
   Term loan payable - current portion                                           1,095                 540
   Accrued payroll related costs                                                 1,864               1,238
   Accrued consulting and contracted research                                      365                 935
   Accrued expenses and other current liabilities                                1,931               1,185
                                                                       ----------------     ---------------
      Total current liabilities                                                  7,859               6,877

Long-term liabilities:
   Bond payable, less current portion                                            5,882               6,588
   Term loan payable, less current portion                                       5,472               4,317
                                                                       ----------------     ---------------

      Total liabilities                                                         19,213              17,782

Stockholders' equity:
   Preferred stock, par value $.01 per share
        Authorized 4,700,000 shares,  none issued                                    -                   -
   Series A junior participating preferred stock,
        par value $.01 per share. Authorized 300,000
        shares, none issued                                                          -                   -
   Common stock, par value $.01 per share.
        Authorized 40,000,000 shares
       19,348,407 and 13,979,490 issued and
       outstanding at September 30, 1997
       and December 31, 1996                                                       193                 140
   Additional paid-in capital                                                  184,793              90,880
   Accumulated deficit                                                         (20,147)            (14,874)
   Notes receivable on common stock                                                (60)               (129)
   Unrealized gain on available for sale securities                                437                  62
   Treasury stock - restricted                                                    (878)                  -
   Deferred compensation                                                          (319)               (202)
                                                                       ----------------     ---------------
                      Total stockholders' equity                               164,019              75,877
                                                                       ----------------     ---------------
                                                                        $      183,232       $      93,659
                                                                       ================     ===============
</TABLE>

SEE ACCOMPANYING NOTES TO CONSOLIDATED FINANCIAL STATEMENTS.


                                      3

<PAGE>   4
                        GUILFORD PHARMACEUTICALS INC.
                               AND SUBSIDIARIES



                    CONSOLIDATED STATEMENTS OF OPERATIONS
                                 (UNAUDITED)
                      (IN THOUSANDS, EXCEPT SHARE DATA)



<TABLE>
<CAPTION>
                                                    THREE MONTHS ENDED SEPTEMBER 30,        NINE MONTHS ENDED SEPTEMBER 30,
                                                      1997                    1996             1997                 1996
                                                --------------          -------------     -------------       -------------- 
<S>                                              <C>                     <C>               <C>                 <C>
Revenues:                                                                                                                    
    Contract revenues                            $     15,000            $    20,000       $    15,000         $     27,600
    Product sales                                       1,055                    -               4,880                  -
    License fees and royalties                            496                    -               1,152                  -
    Revenues under collaborative agreements                97                     12               266                   31
                                                --------------          -------------     -------------       -------------- 
       Total revenues                                  16,648                 20,012            21,298               27,631
                                                                                                                  
Costs and Expenses:                                                                                               
    Cost of sales                                         538                    -               2,060                  -
    Research and development                            9,469                  5,831            23,080               13,253
    General and administrative                          2,152                  1,608             5,779                4,516
                                                --------------          -------------     -------------       -------------- 
       Total costs and expenses                        12,159                  7,439            30,919               17,769
                                                --------------          -------------     -------------       -------------- 
Operating  income (loss)                                4,489                 12,573            (9,621)               9,862
Other income (expense):                                                                                           
    Interest income                                     2,067                    767             4,927                1,921
    Other income                                            -                      5                36                    6
    Interest expense                                     (215)                  (157)             (615)                (345)
                                                --------------          -------------     -------------       -------------- 
          Net income (loss)                      $      6,341            $    13,188       $    (5,273)        $     11,444
                                                ==============          =============     =============       ==============
                                                                                                                  
                                                                                                                  
Earnings (loss) per common share:                $       0.32            $      0.86       $     (0.31)        $       0.81
                                                ==============          =============     =============       ==============
                                                                                                                  
Weighted average common and                                                 
  common equivalent shares outstanding             20,052,459             15,378,086        16,961,043           14,214,433
                                                ==============          =============     =============       ==============

</TABLE>

SEE ACCOMPANYING NOTES TO CONSOLIDATED FINANCIAL STATEMENTS.


                                      4
<PAGE>   5
                        GUILFORD PHARMACEUTICALS INC.
                               AND SUBSIDIARIES


                                                                
                CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY
                     NINE MONTHS ENDED SEPTEMBER 30, 1997
                                 (UNAUDITED)
                      (IN THOUSANDS, EXCEPT SHARE DATA)
                                                



<TABLE>
<CAPTION>
                                                                   COMMON STOCK                                           NOTES  
                                                                   ------------            ADDITIONAL                  RECEIVABLE
                                                              NUMBER                        PAID-IN     ACCUMULATED     ON COMMON 
                                                             OF SHARES         AMOUNT       CAPITAL       DEFICIT         STOCK    
                                                             ---------         ------       -------       -------         -----
<S>                                                         <C>                <C>         <C>          <C>             <C>
BALANCE, DECEMBER 31, 1996                                  13,979,490         $ 140       $ 90,880     $ (14,874)      $ (129)  
Issuance of common stock in  secondary public offering                                                                           
   at $20.00 per share, net of offering costs                3,737,500            37         70,449                              
Other issuances of common stock                              1,631,417            16         22,606                              
Purchase of common stock                                                                                                         
Amortization of stock option compensation                                                       858                              
Amortization of deferred compensation                                                                                            
Reduction in notes receivable on common stock                                                                               69   
Unrealized gain on available for sale securities                                                                                 
Net loss for the period                                                                                    (5,273)               

                                                           ------------       -------    -----------   -----------      -------
BALANCE, SEPTEMBER 30, 1997                                 19,348,407         $ 193      $ 184,793     $ (20,147)       $ (60)  
                                                           ============       =======    ===========   ===========      =======
<CAPTION>
                                                                  UNREALIZED
                                                                   GAIN ON          TREASURY                         TOTAL   
                                                                AVAILABLE FOR        STOCK           DEFERRED     STOCKHOLDERS'
                                                               SALE SECURITIES     RESTRICTED      COMPENSATION      EQUITY   
                                                               ---------------     ----------      ------------      ------
<S>                                                                <C>             <C>               <C>           <C>
BALANCE, DECEMBER 31, 1996                                         $      62       $     -           $ (202)       $  75,877 
Issuance of common stock in  secondary public offering                                                                       
   at $20.00 per share, net of offering costs                                                                         70,486 
Other issuances of common stock                                                                        (331)          22,291 
Purchase of common stock                                                              (878)                             (878)
Amortization of stock option compensation                                                                                858 
Amortization of deferred compensation                                                                   214              214 
Reduction in notes receivable on common stock                                                                             69 
Unrealized gain on available for sale securities                         375                                             375 
Net loss for the period                                                                                               (5,273)
                                                                  -----------     ---------         --------      -----------
BALANCE, SEPTEMBER 30, 1997                                        $     437       $  (878)          $ (319)       $ 164,019 
                                                                  ===========     =========         ========      ===========
</TABLE>

SEE ACCOMPANYING NOTES TO CONSOLIDATED FINANCIAL STATEMENTS.



                                      5
<PAGE>   6

                       GUILFORD PHARMACEUTICALS INC.
                              AND SUBSIDIARIES
                                (UNAUDITED)
                   CONSOLIDATED STATEMENTS OF CASH FLOWS
                     (IN THOUSANDS, EXCEPT SHARE DATA)




<TABLE>
<CAPTION>
                                                               THREE MONTHS ENDED SEPTEMBER 30,    NINE MONTHS ENDED SEPTEMBER 30,
                                                               --------------------------------    -------------------------------
                                                                     1997             1996                1997           1996
                                                                     ----             ----                ----           ----
<S>                                                            <C>                <C>              <C>               <C>
CASH FLOWS FROM OPERATING ACTIVITIES:                                                                              
   Net income (loss)                                           $     6,341        $    13,188      $     (5,273)     $  11,444
   Adjustments to reconcile net income (loss) to                                                                   
     net cash provided by                                                                                          
     (used in) operating activities:                                                                               
      Depreciation and amortization                                    874                307             2,073            797
      Noncash compensation expense                                     132                743             1,072            850
   Changes in assets and liabilities:                                                                              
      Accounts receivable - net                                        758                 -               (300)            -
      Collaborative research receivable                                227                 -                198             -
      Subscription receivable                                      (20,000)                -            (20,000)            -
      Licensing fee receivable                                          -                  -                 -             556
      Notes receivable                                                  -                  30                -              56
      Inventory                                                        176               (135)              280           (135)
      Other current assets                                            (617)              (177)             (710)           (45)
      Other assets                                                      54                (11)              111             (3)
      Accounts payable                                                   3               (954)             (375)           143
      Accrued expenses and other liabilities                         1,574              1,336               650            869
                                                              --------------       ------------      ------------   ------------
         Net cash provided by (used in)                                                                            
          operating activities                                     (10,478)            14,327           (22,274)        14,532
                                                              --------------       ------------      ------------   ------------
CASH FLOWS FROM INVESTING ACTIVITIES:                                                                              
   Investment in purchases of property and equipment                  (897)            (1,067)           (3,680)        (8,068)
   Maturities of held-to-maturity investments                       13,386             21,443            32,320         41,941
   Maturities of available-for-sale investments                     12,751                 -             28,872             -
   Purchases of held-to-maturity investments                       (16,529)           (19,200)          (38,949)       (81,395)
   Purchases of available-for-sale investments                     (32,825)                 -           (98,646)            -
   Restricted investments                                              205               (539)              556           (528)
                                                              --------------       ------------      ------------   ------------
         Net cash used in investing activities                     (23,909)               637           (79,527)       (48,050)
                                                              --------------       ------------      ------------   ------------
CASH FLOWS FROM FINANCING ACTIVITIES:                                                                              
   Net proceeds from issuances of common stock                      20,849                 53            92,067         50,511
   Purchase of treasury stock                                         (151)                 -              (878)            -
   Proceeds from bond and term loan issuances                          620              2,166             1,710          6,459
   Equity proceeds from Gell Pharmaceuticals, Inc.                                                                 
     relating to the put option                                         -                 289               698            737
   Payment of notes receivable on common stock                          39                 -                 69             -
   Principal payments on bond payable                                 (236)              (157)             (706)          (235)
                                                              --------------       ------------      ------------   ------------
         Net cash provided by financing activities                  21,121              2,351            92,960         57,472
                                                              --------------       ------------      ------------   ------------
Net increase (decrease) in cash and cash equivalents               (13,266)            17,315            (8,841)        23,954
CASH AND CASH EQUIVALENTS AT THE BEGINNING OF PERIOD                20,985             10,899            16,560          4,260
                                                              --------------       ------------      ------------   ------------
CASH AND CASH EQUIVALENTS AT THE END OF PERIOD                 $     7,719          $  28,214         $   7,719      $  28,214
                                                              ==============       ============      ============   ============
                                                                                                                   
                                                                                                                   
Supplemental disclosures of cash flow information:                                                                 
    Net interest paid                                          $       215          $     100         $     609      $     317
    Income taxes paid                                          $        -           $      -          $     179      $      -
    Unrealized gain or on available for sale securities        $       226          $      -          $     375      $      -
    Collateral transferred from unrestricted to                                                                    
      restricted investments, net                              $       800          $   2,087         $   1,656      $   3,838
                                                              ==============       ============      ============   ============
</TABLE>

SEE ACCOMPANYING NOTES TO CONSOLIDATED FINANCIAL STATEMENTS.
<PAGE>   7
                         GUILFORD PHARMACEUTICALS INC.
                                AND SUBSIDIARIES



                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               SEPTEMBER 30, 1997
                                  (UNAUDITED)

1.       BASIS OF PRESENTATION

         The consolidated financial statements included herein have been
prepared, without audit, pursuant to the rules and regulations of the
Securities and Exchange Commission.  Certain information and footnote
disclosures normally included in consolidated financial statements prepared in
accordance with generally accepted accounting principles have been condensed or
omitted pursuant to such rules and regulations.  These consolidated 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/A for
the year ended December 31, 1996.


         In the opinion of the Company's management, any adjustments contained
in the accompanying unaudited consolidated financial statements are of a normal
recurring nature, necessary to present fairly its financial position, results
of operations, changes in stockholders' equity and cash flows for the three and
nine month periods ended September 30, 1997 as set forth in the Index.  Interim
results are not necessarily indicative of results for the full fiscal year.


         Net loss per share data for the periods ending September 30, 1996 have
been adjusted to reflect a three-for-two stock split declared on October 15,
1996.

2.       PRINCIPLES OF CONSOLIDATION

         The consolidated financial statements include the accounts of Guilford
Pharmaceuticals Inc. and its subsidiaries, all of which are wholly owned.  All
significant intercompany transactions have been eliminated.

3.       ACCOUNTING POLICIES

         NET EARNINGS (LOSS) PER SHARE

         The computation of net earnings (loss) per share is based on the
weighted average common shares outstanding during the periods, and include,
when their effect is dilutive, common stock equivalents consisting of warrants,
stock options and put rights.

         RECENT ACCOUNTING PRONOUNCEMENTS

         In February 1997, the Financial Accounting Standards Board ("FASB")
issued Statement No. 128, "Earnings Per Share" ("SFAS 128").  SFAS 128 is
effective for financial statements for periods





                                       7
<PAGE>   8
                         GUILFORD PHARMACEUTICALS INC.
                                AND SUBSIDIARIES


3.       ACCOUNTING POLICIES (CONTINUED)

         RECENT ACCOUNTING PRONOUNCEMENTS (CONTINUED)

ending after December 15, 1997. Under SFAS 128, primary and fully diluted
earnings per share are replaced by basic and diluted earnings per share. SFAS
128 requires companies to change the method currently used to compute earnings
per share and to restate all prior periods for comparability. The adoption of
SFAS 128 is not expected to have a material impact on the Company's earnings
per share because the Company currently expects to be in a loss position for
the year ending December 31, 1997 and, consequently, common equivalent shares
from stock options are excluded as their effect is anti-dilutive.

         The FASB has recently issued three new accounting standards, Statement
No. 129, "Disclosure of Information about Capital Structure", Statement No.
130, "Reporting Comprehensive Income" and Statement No. 131, "Disclosures about
Segments of an Enterprise and Related Information", and if adopted will be
effective for periods presented after December 31, 1997.  The Company is
evaluating the effect of these new statements.

         RECLASSIFICATIONS

         Certain amounts have been reclassified to conform with the current
period's presentation.

4.       INVENTORIES

         Inventories consist of the following (in thousands):

<TABLE>
<CAPTION>
                                  September 30, 1997     December 31, 1996
                                      (Unaudited)      
             <S>                        <C>                    <C>   
             Finished products          $  224                 $  501
             Work in process               737                    432
             Raw materials                 292                    600
                                         -----                  -----
                                        $1,253                 $1,533
                                         =====                  =====
</TABLE>

         Inventories include products and materials that can be either held for
sale to third parties as well as used in the Company's development activities.
The amount of products or materials identified as intended for development
activities is expensed as soon as such inventory is specifically identified for
non-commercial use.

5.       CONTRACT REVENUE

         On August 20, 1997, the Company entered into a Binding Term Sheet (the
"Amgen Agreement") with Amgen Inc. ("Amgen") respecting the research,
development and commercialization of the





                                       8
<PAGE>   9
                         GUILFORD PHARMACEUTICALS INC.
                                AND SUBSIDIARIES


5.    CONTRACT REVENUE (CONTINUED)

Company's FKBP-based neuroimmunophilin ligand technology ("Neuroimmunophilin
Technology") for all human therapeutic and diagnostic applications.  Pursuant
to the terms of the Amgen Agreement, Amgen initially paid the Company an
aggregate of $35 million as follows:  (a) a one-time, non-refundable payment of
$15 million upon the signing of the Amgen Agreement in August, 1997, and (b) a
second payment of $20 million made on October 1, 1997 upon the closing of
Amgen's purchase for 640,095 shares of the Company's common stock ("Common
Stock") and five-year Warrants to purchase up to an additional 700,000 shares
of Common Stock at an exercise price of $35.15 per share.  In connection with
the sale of these securities, the Company granted Amgen certain demand and
"piggyback" registration rights under the Securities Act of 1933, as amended.


         Under the terms of the Amgen Agreement, Amgen has also agreed to
provide to the Company up to $13.5 million in the aggregate, payable quarterly
over three years, to support research activities at the Company relating to the
Neuroimmunophilin Technology, with an option to fund a fourth year of research.
The Amgen Agreement provides for certain milestone payments to the Company in
up to ten different specified clinical indications, seven of which are
neurological and three of which are non-neurological, in the event Amgen
achieves certain development milestones.  In addition, the Company will receive
royalties on product sales, if any related to the Neuroimmunophilin Technology
in the future.

         The Company recognized $27.5 million in contract revenues for the nine
months ended September 30, 1996 relating to non-refundable payments pursuant to
the Company's Marketing, Sales and Distribution Rights Agreement (together with
related agreements, the "RPR Agreements") with Rhone-Poulenc Rorer
Pharmaceuticals Inc. ("RPR").

6.       PRODUCT SALES & ROYALTIES

         Pursuant to the RPR Agreements the Company recognized revenues of
$1.45 million ($1.0 million in product sales and $446,000 in royalty revenues)
and of $6.0 million ($4.9 million in product sales and $1.1 million in royalty
revenues), respectively, for the three and nine months ended September 30, 1997
relating to sales of GLIADEL 7 Wafer ("GLIADEL").  GLIADEL was commercially
launched in the United States on February 25, 1997.  Under the RPR Agreements,
Guilford receives a combined transfer price of 20% and royalty of 15% (which
escalates up to 20% on incremental sales based on achieving certain levels of
total annual GLIADEL sales) of the net sales of GLIADEL.

7.       INCOME TAXES

         As of December 31, 1996, the Company had net operating loss ("NOL")
carryforwards available in the United States for federal income tax purposes of
approximately $10.6 million, which will begin to expire at various dates
between 2008 to 2010.  NOL carryforwards are subject to ownership





                                       9
<PAGE>   10
                         GUILFORD PHARMACEUTICALS INC.
                                AND SUBSIDIARIES




7.       INCOME TAXES (CONTINUED)

change limitations and may also be subject to various other limitations on the
amounts to be utilized. Additionally, through December 31, 1996, the Company
had foreign tax credit carryforwards of $61,000 expiring in 2000 and 2001, and
general business tax credit carryforwards of $960,000 expiring between 2008 and
2011.

         Realization of net deferred tax assets related to the Company's NOL
carryforwards and other items is dependent on future earnings, which are
uncertain.  Accordingly, a valuation allowance has been established equal to
deferred tax assets which may not be realized in the future, resulting in net
deferred tax assets of approximately $179,000 at September 30, 1997.

         Income tax expense for the nine months ended September 30, 1997 and
1996 differs from the expected amount and hence no provision is shown on the
Statement of Operations for the following reasons:

<TABLE>
<CAPTION>
                                                          September 30,
                                                       1997          1996
                                                    ------------------------
                                                         ($ in thousands)
<S>                                                  <C>            <C>
Computed expected tax provision (benefit)                      
  - Federal and state                                ($1,793)       $3,900
Increase (decrease) in valuation allowance             1,793        (3,900)
                                                      -------       ------- 
                                                               
                 Income tax expense                   $    -        $   -   
                                                      =======       =======
</TABLE>                                       


8.       COMMITMENTS

         In June, 1997, the Company entered into an operating lease for 16,200
square feet of laboratory and office space with an initial term commencing on
June 22, 1997 and ending on December 31, 1998.  In October, 1997 the Company
exercised its option under the lease to extend the term of the lease until June
30, 1999.  The Company is obligated to pay minimum future rental payments
related to this lease of $255,500, $486,000 and $243,000 for the years ending
December 31, 1997, 1998 and 1999, respectively.





                                       10
<PAGE>   11
                         GUILFORD PHARMACEUTICALS INC.
                                AND SUBSIDIARIES



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

         Any statements made by Guilford Pharmaceuticals Inc. (together with
its subsidiaries, "Guilford" or the "Company") in this quarterly report that
are forward looking are made pursuant to the safe harbor provisions of the
Private Securities Litigation Reform Act of 1995.  The following discussion
contains forward-looking statements, including, but not limited to, those
concerning the commencement and completion of the research program relating to
the Company's FKBP-based neuroimmunophilin ligand technology and clinical
development activities, the Company's strategic plans, anticipated expenditures
and the need for additional funds, all of which involve significant risks and
uncertainties. The Company's actual results may differ significantly from the
results discussed in the forward-looking statements.  Information concerning
factors that could affect such results are set forth herein and in the
Company's filings with the Securities and Exchange Commission, including the
section entitled "Risk Factors" in the Company's Registration Statement on Form
S-3, declared effective September 16, 1997 (the "September 1997 Form S-3").


                                  *    *    *

GENERAL

         Guilford is a biopharmaceutical company engaged in the development
and commercialization of novel products in two principal areas: (i) targeted
and controlled drug delivery products using proprietary biodegradable polymers
for the treatment of cancer and other diseases; and (ii) therapeutic and
diagnostic products for neurological diseases and conditions. Since its
inception, the Company has initially focused its efforts on commercializing its
first product, GLIADEL(R)Wafer ("GLIADEL"), a proprietary biodegradable polymer
product for delivering the chemotherapeutic agent, BCNU, for brain cancer and
developing its second product candidate, DOPASCAN(R) Injection ("DOPASCAN"), a
radiolabeled imaging agent for the diagnosis and monitoring of Parkinson's
disease. The Company has in-licensed and developed itself certain technologies
that may be useful in connection with the prevention and treatment of certain
neurological diseases and conditions as well as new types of biodegradable
polymers and has accelerated research and development activities with respect
to certain of these technologies.

         The Company anticipates that its future revenues will come primarily
from two sources: (i) transfer payments and/or royalties related to sales of
GLIADEL and other products that may be developed in the future and (ii)
milestone, rights and other payments made under the Company's current and any
future collaboration agreements relating to the research, development and/or
commercialization of the Company's technologies.  As noted below, the Company
is eligible for certain milestone and other payments in the future under its
collaborations with Rhone-Poulenc Rorer Pharmaceuticals Inc. ("RPR") and Amgen
Inc. ("Amgen") if certain regulatory and/or development objectives are attained
and views these potential payments as significant future revenue opportunities.
As noted below and in the September 1997  Form S-3, there can be no assurance,
however, that the Company will be successful in its efforts to enter into
future collaborations for the research, development and/or commercialization of
its technologies or will receive any or all of the milestone payments for which
it is eligible under its existing or any future collaborations.





                                      11
<PAGE>   12
                         GUILFORD PHARMACEUTICALS INC.
                                AND SUBSIDIARIES


         In September 1996, the U.S. Food and Drug Administration ("FDA")
cleared the Company's New Drug Application for GLIADEL as an adjunct to surgery
in-patients with recurrent glioblastoma multiforme for whom surgery is
indicated.  On February 25, 1997, GLIADEL was commercially launched in the
United States by the Company's worldwide (except in Scandinavia) marketing
partner, RPR, and since launch, the Company has recognized $6.0 million in
product sales and royalties for the first nine months of 1997.  Of this $6.0
million amount, $4.9 million represent sales of GLIADEL to RPR and $1.1 million
represent royalties on RPR sales to third parties.  In addition, under the
terms of its agreements with RPR, the Company is eligible to receive up to $40
million in milestone and other payments if RPR is able to achieve certain
specified regulatory objectives. As noted below and in the September 1997 Form
S-3, future sales of GLIADEL are subject to significant risk and uncertainty,
and there can be no assurance that both sales to RPR and sales to third parties
will increase or continue at the current rate in future periods.  Furthermore,
the milestone and other payments payable by RPR are contingent on making
certain domestic and international regulatory filings and obtaining clearances
for GLIADEL, the timing and extent of which are not within the control of the
Company, and there can be no assurance that any or all of such regulatory
objectives will be attained.  Except for GLIADEL, the Company's product
candidates are not expected to generate revenues from product sales for at
least the next several years, if at all.

         On August 20, 1997, the Company entered into a Binding Term Sheet (the
"Amgen Agreement") with Amgen respecting the research, development and
commercialization of the Company's FKBP-based neuroimmunophilin ligand
technology ("Neuroimmunophilin Technology") for all human therapeutic and
diagnostic applications.  Pursuant to the terms of the Amgen Agreement, Amgen
initially paid the Company an aggregate of $35 million as follows:  (a) a
one-time, non-refundable payment of $15 million upon the signing of the Amgen
Agreement in August, 1997, and (b) a second payment of $20 million made on
October 1, 1997 upon the closing of Amgen's purchase for 640,095 shares of the
Company's common stock ("Common Stock") and five-year Warrants to purchase up
to an additional 700,000 shares of Common Stock at an exercise price of $35.15
per share.  In connection with the sale of these securities, the Company
granted Amgen certain demand and "piggyback" registration rights under the
Securities Act of 1933, as amended.

        Under the terms of the Amgen Agreement, Amgen has also agreed to
provide to the Company up to $13.5 million in the aggregate, payable quarterly
over three years, to support research activities at the Company relating to the
Neuroimmunophilin Technology, with an option to fund a fourth year of research.
The Amgen Agreement provides for milestone payments of up to $392 million in
the aggregate to the Company in the event Amgen achieves certain specified
development milestones in each of ten different clinical indications, seven of
which are neurological and three of which are non-neurological, specified in
the Amgen Agreement.  In addition, the Company will receive royalties on
product sales, if any, related to the Neuroimmunophilin Technology in the
future. Amgen has a minimum two-year research funding obligation, and Amgen may
elect at any time to discontinue all activities relating to the development and
commercialization of the Neuroimmunophilin Technology.  As noted below and in
the September 1997 Form S-3, there can be no assurance Amgen will be able to
successfully develop any FKBP-based neuroimmunophilin compound into a safe and
effective FDA-approved drug for neurological or other uses or that Guilford
will earn any or all of the milestone payments



                                       12
<PAGE>   13
                         GUILFORD PHARMACEUTICALS INC.
                                AND SUBSIDIARIES


related to such development activities.

         Through December 31, 1996, substantially all the Company's revenues
had been recognized as non-refundable research and development or rights and
milestone payments under the Company's collaborations.  While the Company
reported net earnings of $5.1 million for fiscal 1996, the Company incurred net
operating losses from its inception through the first quarter of 1996 and again
in the fourth quarter of 1996.  For the three and nine months ended September
30, 1997, the Company had a net income of $6.3 million (primarily the result of
the one-time, non-refundable signing fee of $15 million  from Amgen) and a net
loss of $5.3 million, respectively, and through September 30, 1997, the Company
had an accumulated deficit of $20.1 million. 

         In addition to revenues related to GLIADEL, the Company's only other
revenues recognized in fiscal year 1997 as of September 30, 1997 consist of the
one-time, non-refundable signing fee of $15 million from Amgen.  As noted
above, during the remainder of 1997 the Company anticipates recognizing revenue
in the form of payments made by Amgen for certain research activities to be
conducted by the Company pursuant to the Amgen Agreement.  In addition, in the
future the Company may be entitled to certain non-refundable, milestone
payments in the event certain development milestones are achieved by Amgen and
to royalties on future product sales, if any. As noted below and in the
September 1997 Form S-3, whether the Company will ever recognize future
revenues in the form of milestone payments and royalties under the Amgen
Agreement is subject to significant risk and uncertainty, and there can be no
assurance that that the Company will recognize significant revenues, if any,
from these sources in the future.

         The Company does not anticipate that 1997 will be profitable, and
there can be no assurance that the Company will ever achieve or sustain
profitability in the future. Furthermore, the Company expects to experience
quarter-to-quarter and year-to-year fluctuations in its operating results based
upon the timing and amount of sales of GLIADEL, the timing and realization of
milestone and other payments under the Company's agreements with RPR and Amgen
and other existing and potential collaborations,  expenditures relating to the
Company's research and development, clinical and manufacturing activities, and
the extent and timing of costs related to the Company's patenting activities
and other activities undertaken in connection with the preservation and
extension of the Company's intellectual property rights.

         The Company expects that expenses related to research and product
development, preclinical testing, clinical trials, regulatory matters,
operations, manufacturing and general and administrative expenses will continue
to increase as the Company commercializes GLIADEL through its marketing
partners and conducts research and development activities to develop its other
technologies and potential products.  The Company has experienced substantial
personnel growth since its inception. As of September 30, 1997 the Company had
187 full-time employees as compared to 140 full-time employees at December 31,
1996. The Company's ability to achieve consistent profitability in the future
will depend, among other things, upon future sales of GLIADEL as well as the
Company's ability, either alone or with others, to develop its product
candidates successfully including any product candidates identified pursuant to
activities under the collaboration with Amgen, conduct





                                       13
<PAGE>   14
                         GUILFORD PHARMACEUTICALS INC.
                                AND SUBSIDIARIES


clinical trials, obtain required regulatory clearances, manufacture at
reasonable cost and successfully market its product candidates and enter into
collaborative arrangements and license agreements on acceptable terms.  For
discussion of these and other risks, see the "Risk Factors" section of the
September 1997 Form S-3, particularly those paragraphs specifically addressing
the aforementioned risks.

         Future sales of GLIADEL are subject to certain risks, including the
following.  The Company's agreements with RPR do not impose any minimum
purchase requirements on the part of RPR, and there can be no assurance that
RPR will be successful in marketing and selling GLIADEL.  In particular, prior
to the commercial launch of GLIADEL in the United States in February 1997,
RPR's oncology sales force had no prior experience marketing and selling a
product to neurosurgeons.  Furthermore, GLIADEL represents a novel approach to
the treatment of brain cancer, and there can be no assurance of broad
acceptance by the medical or patient communities.  The Company currently relies
on a single supplier for BCNU, the chemotherapeutic agent used in GLIADEL, and
on its own single manufacturing facility to produce GLIADEL.  Inability to
secure timely, sufficient, or GMP quality supply of BCNU, unforeseen plant
shutdowns due to personnel or plant or equipment problems, risks associated
with regulatory compliance (including the need to manufacture GLIADEL in
accordance with the FDA's Good Manufacturing Practice (GMP) regulations), and
the potential inability to meet future product demand, among others, could
adversely affect the timing and extent of any future revenues related to
GLIADEL sales.  For discussion of these and other risks, see the "Risk Factors"
section of the September 1997 Form S-3, particularly those paragraphs
specifically addressing the aforementioned risks.

         Moreover, there can be no assurance that Amgen will be able to achieve
any of the development milestones set forth in the Amgen Agreement with respect
to any specified indication. The research, development and commercialization
of early stage technology like the Neuroimmunophilin Technology is subject to
significant risks and uncertainty respecting, among other things, selection of
an appropriate lead compound, successful completion of the pre-clinical and
clinical development activities, regulatory clearances, formulation of final
product dosage forms, scale-up from bench quantities to commercial quantities
and manufacture of products and commercialization of such products as well as
the successful preservation and extension of the patent and other intellectual
property rights. For discussion of these and other risks, see the "Risk
Factors" section of the September1997 Form S-3, particularly those paragraphs
specifically addressing the aforementioned risks.

RESULTS OF OPERATIONS

Comparison of the Three and Nine Month Periods Ended September 30, 1997 and
1996

         The Company recognized $16.6 million and $21.3 million, respectively,
in revenues for the three and nine months ended September 30, 1997, consisting
primarily of the one-time, non-refundable signing payment of $15 million from
Amgen and revenues from product sales and royalties relating to GLIADEL as well
as amounts reimbursed by RPR relating to the Company's efforts to develop a
high dose GLIADEL product.  For the same periods in 1996 the Company recognized
$20.0





                                       14
<PAGE>   15
                         GUILFORD PHARMACEUTICALS INC.
                                AND SUBSIDIARIES


million and $27.6 million, respectively, in revenues, primarily related to a
rights and milestone payment for an aggregate of $27.5 million made to the
Company by RPR under the Company's agreements with RPR respecting the
marketing, sales and distribution of GLIADEL.

         Revenues received by the Company respecting GLIADEL sales consist of
two main components: (i) transfer price payments related to sales of product
directly to RPR and (ii) royalty payments made by RPR to the Company on product
sales to end-users.  GLIADEL was commercially launched in the United States by
RPR on February 25, 1997.  The majority of the revenues received by the Company
in each of the first two quarters of 1997 related to GLIADEL have consisted of
transfer price payments related to sales of GLIADEL to RPR in order for RPR to
build up an initial inventory of the product.  The reduction in revenues
related to GLIADEL sales in the third quarter of 1997 as compared to the second
quarter of 1997 has primarily resulted from the reduction in the level of
transfer payments made by RPR from $1.8 million for the second quarter of 1997
to $1.0 million for the third quarter of 1997, reflecting a stabilization in
RPR's current inventory requirements for GLIADEL.  Based on information from
RPR concerning its future inventory needs, the Company currently expects the
amount of transfer payments to be made by RPR in the fourth quarter of 1997 not
to exceed the amount paid in the third quarter of 1997.  Royalties paid by RPR
on end-user sales remained level from the second quarter to the third quarter
of 1997, and based solely on the information supplied by RPR, the Company
currently does not expect royalty amounts to increase significantly in the
fourth quarter of 1997.  As noted above and in the September 1997 Form S-3,
future GLIADEL sales are subject to a number of risks and uncertainties, and
there can be no  assurance that GLIADEL sales will generate significant
revenues for the Company.

         Cost of sales for the three and nine months ended September 30, 1997
were $538,000, and $2.1 million, respectively.  Included in these amounts are
approximately $61,000 for the three months ended September 30, 1997
representing royalty payments made to a third party from which the Company has
licensed certain technologies related to GLIADEL and approximately $326,000 for
the nine months ended September 30, 1997 representing both third party royalty
payments and certain costs specifically related to the commercial product
launch of GLIADEL in the United States. To the extent GLIADEL production levels
increase, the Company expects that per unit product costs may decrease as
economies of scale are achieved.  There can be no assurance; however, that
GLIADEL product sales will ever reach levels necessary for the Company to
realize significant costs savings related to manufacturing economies of scale.

         Research and development expenses increased to $9.5 million and $23.1
million, respectively, for the three and nine months ended September 30, 1997
as compared to $5.8 million and $13.3 million, respectively, for the same
periods in 1996. The increase in these costs was primarily attributable to
expenses related to increased personnel costs, contracted research, consulting,
laboratory supplies and royalties owed to a third-party licensor of certain
technology relating to contract revenues recognized under the Amgen Agreement.
In the third quarter of 1997, the Company continued to accelerate its
neuroimmunophilin, pre-synaptic glutamate inhibitors, polymer, and other
research and development programs, continued to fund development activities at
the third party manufacturer for DOPASCAN, and continued with Phase I clinical
trials for a high dose formulation of GLIADEL. In addition, in the three and
nine months ended September 30, 1997,





                                       15
<PAGE>   16
                         GUILFORD PHARMACEUTICALS INC.
                                AND SUBSIDIARIES


research and development expenses included charges relating to certain
consulting agreements entered into in April 1996, consisting of non-cash
compensation expense of $93,000 and $858,000, respectively, and cash
compensation expense of $62,500, and $181,000, respectively. For the three and
nine month periods ended September 30, 1996, non-cash compensation expense
related to these agreements of $711,000 and $ 755,000, respectively, and cash
compensation expense of $106,000 and $151,000, respectively, were recorded.
These agreements are intended to enhance the Company's ability to develop new
polymer technologies and products for the delivery of chemotherapeutics in
indications where local tumor recurrence is likely and controlled release may
be more effective than current therapies.  The Company expects it will be
required to record varying amounts of non-cash compensation charges in research
and development expenses through 2001 relating to these agreements quarterly of
up to an additional $1.3 million in the aggregate.  The Company anticipates
that its research and development expenses will continue to increase
significantly in future periods.

         General and administrative expenses were $2.2 million and $5.8 million
for the three and nine months ended September 30, 1997 as compared to $1.6
million and $4.5 million, respectively for the same periods in 1996. The
increase in general and administrative expenses of $500,000 and $1.2 million
for the three and nine months ended September 30, 1997, respectively, compared
to the same period in 1996 was attributable to higher personnel costs related
to an increase in the number of employees necessary to support the Company's
research and development and commercialization activities.  Additionally,
indirect personnel costs, including recruiting and relocation costs, have
increased as the total number of such employees has increased.  Increases in
costs related to patenting and other activities related to establishment and
preservation of the Company's intellectual property rights and costs related to
operations as a public company also contributed to increased general and
administrative expenditures over this period.  The Company anticipates that its
general and administrative expenses will increase in future periods.

         Other income and expense relates primarily to interest income and
interest expense. Interest income increased to $2.1 million and $4.9 million,
respectively, for the three and nine months ended September 30, 1997 as
compared to $767,000 and $1.9 million for the same periods in 1996. The
increase was primarily attributable to an increase in the average invested
capital during the three and nine months ended September 30, 1997 as compared
to the same periods in 1996.  The increase in average invested capital was
primarily due to the public sale of the Company's Common Stock in April, 1997
and the one-time, non-refundable signing fee of $15 million paid by Amgen in
August 1997.  For the three and nine months ended September 30, 1997, the
Company incurred interest expense of $215,000 and $615,000, respectively,
relating to borrowings under its loan agreements with Signet Bank providing for
the construction of manufacturing, administrative and research and development
facilities and the purchase of related equipment.  Interest expense was
$157,000 and $345,000, respectively, for the three and nine months ended
September 30, 1996.  The increase in interest expense for the 1997 periods as
compared to those in 1996 resulted from greater outstanding principal balances
during the later periods under these loan agreements.

LIQUIDITY AND CAPITAL RESOURCES





                                       16
<PAGE>   17
                         GUILFORD PHARMACEUTICALS INC.
                                AND SUBSIDIARIES


         The Company's cash and investments were $144.8 million at September
30, 1997. Included in this amount is $12.6 million of restricted cash held as
collateral with respect to certain of the Company's indebtedness.  The
increase in cash and investments of $67.4 million from December 31, 1996 to
September 30, 1997 was primarily due to the public sale in April 1997 of an
aggregate of approximately 3.7 million shares of the Company's Common Stock,
resulting in net proceeds to the Company of approximately $71 million, and the
one-time, non-refundable signing fee of $15 million paid by Amgen in August
1997.  In addition, the Company received an aggregate of $20 million from Amgen
on October 1, 1997 upon the closing of its purchase of 640,095 shares of the
Company Common Stock and five-year Warrants to purchase up to an additional
700,000 shares of Common Stock at an exercise price of $35.15 per share.  This
$20 million amount is recorded as a subscription receivable on the Company's
September 30, 1997 balance sheet.

         The Company incurred capital expenditures of $0.9 million for the
three months ended September 30, 1997 compared to $1.1 million for the same
period in 1996.  The capital expenditures made in the 1997 period were
primarily for purchases of capital equipment, consisting of laboratory,
manufacturing, and computer equipment, and the construction of the Company's
manufacturing plant for GLIADEL and other polymers under development.  The
capital expenditures made in the 1996 period were primarily for the
construction of the Company's polymer manufacturing plant and tenant
improvements for research and development laboratories and administrative
offices. In addition, funds were used to purchase capital equipment, consisting
of laboratory, manufacturing and computer equipment.  Construction of the
Company's research and development laboratories and administrative offices was
substantially completed in November 1996.

         The Company had available approximately $133,000 at September 30, 1997
under its existing loan agreements with Signet Bank to finance the remaining
tenant improvements related to the construction of laboratories and related
areas. To finance capital equipment, the Company finalized a $5.0 million
operating lease arrangement with General Electric Capital Corporation in
September 1996 for the financing of certain equipment. Such financing, along
with other sources of funds, is expected to provide for the Company's equipment
needs at least through the fourth quarter of 1997. At September 30, 1997, $1.2
million was available under this arrangement with General Electric Capital
Corporation to lease additional equipment. The Company is currently in
discussions to extend these sources of funding and/or to arrange additional
sources of financing to support the Company's future capital expenditures.

         In order to meet the Company's future facilities needs, the Company is
currently in discussions to enter into a lease or other similar arrangement for
an approximately 72,500 square foot facility to be constructed on a lot
adjacent to the Company's current headquarters in Baltimore, Maryland in order
to support the Company's future research, development and administrative
activities over the next several years.  The Company anticipates that the lease
or other payments for such facility will not exceed $2.0 million annually and
anticipates that the facility will be ready for occupancy prior to the end of
the second quarter of 1999.  There can be no assurance, however, that the
Company will be able to finalize any such lease or other arrangement on
acceptable terms or at all.

         During the remainder of 1997 and 1998, the Company expects to make
additional capital





                                       17
<PAGE>   18
                         GUILFORD PHARMACEUTICALS INC.
                                AND SUBSIDIARIES


expenditures of approximately $3.7 million to expand the Company's GLIADEL
manufacturing and other polymer development plant capacity if, among other
factors, demand for GLIADEL supports such expansion. The Company expects to use
the funds available under its $7.5 million loan agreement with RPR to fund the
expansion.

         As of January 2, 1997, $4.0 million became available under the  loan
agreement; the remainder is available no earlier than 12 nor later than 18
months following funding of the initial tranche. Any principal amounts borrowed
under this loan agreement are due five years from the date borrowed and will
carry an interest rate equal to the lowest rate paid by RPR from time to time
on its most senior indebtedness.  No amounts were outstanding under this loan
at September 30, 1997.

         The Company will require substantial funds in order to continue its
research and development programs and preclinical and clinical testing, to
manufacture and, where applicable, market its products and to meet its future
facilities needs. The Company's capital requirements depend on numerous
factors, including the progress of its research and development programs, the
progress of preclinical and clinical testing, the time and costs involved in
obtaining regulatory approvals, the cost of filing, prosecuting, defending and
enforcing any patent claims and other intellectual property rights, competing
technological and market developments, changes in the Company's existing
research relationships, the ability of the Company to establish collaborative
arrangements, the development of collaborative and licensing agreements and
other arrangements and the progress of manufacturing scale-up efforts.

         The Company believes that its existing resources, including the
proceeds from the sale of Common Stock and Warrants to Amgen in October, 1997
and the interest earned thereon, will be sufficient to fund the Company's
activities for at least the next 12 months.  There can be no assurance,
however, that changes in the Company's research and development and
commercialization plans or other factors affecting the Company's operating 
expenses including potential acquisitions, and anticipated capital expenditures
will not result in the expenditure of these proceeds and the Company's other
resources before that time.

         The Company anticipates that it will fund future capital requirements
through a combination of its existing working capital, revenues (including
product sales, royalty income, and milestones/licensing fees) generated under
its agreements with RPR relating to GLIADEL and Amgen relating to the
Neuroimmunophilin Technology, public or private equity or debt financing (as
necessary), additional collaborative or other research and development
agreements, commercialization and marketing arrangements with corporate
partners or other potential sources. The Company's ability to raise future
capital on acceptable terms is dependent on conditions in the public and
private equity markets and the performance of the Company, as well as the
overall performance of other companies in the biopharmaceutical and
biotechnology sectors. There can be no assurance that any required future
financing arrangements will be available on acceptable terms, or at all.





                                       18
<PAGE>   19

                         GUILFORD PHARMACEUTICALS INC.
                                AND SUBSIDIARIES

          QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK



Not Applicable





                                       19
<PAGE>   20
                         GUILFORD PHARMACEUTICALS INC.
                                AND SUBSIDIARIES


PART II. - OTHER INFORMATION

Item 1.  Legal Proceedings:

         None

Item 2.  Changes In Securities:

         On October 1, 1997, Amgen purchased the following Company securities
in a private placement transaction for an aggregate consideration of $20
million: (a) 640,095 shares of the Company's Common Stock and (b) five-year
Warrants to purchase up to an additional 700,000 shares of Common Stock at an
exercise price of $35.15 per share.  These securities were issued to Amgen
without registration under the Securities Act of 1933 pursuant to the exemption
from registration set forth in Section 4(2) of that act.

Item 3.  Defaults in 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 No.      Description
- -----------      -----------
<S>              <C>
10.49*           Binding Term Sheet, dated August 20, 1997, between Amgen and the 
                 Company and GPI NIL Holdings, Inc. (incorporated by reference from the 
                 Company's Current Report on Form 8-K, filed September 4, 1997)
              
10.50            Common Stock and Warrant Purchase Agreement, dated October 1, 1997, 
                 between Amgen and the Company
              
10.51            Registration Rights Agreement, dated October 1, 1997, between Amgen 
                 and the Company
</TABLE>





                                       20
<PAGE>   21
                         GUILFORD PHARMACEUTICALS INC.
                                AND SUBSIDIARIES



<TABLE>
<S>             <C>
10.52           Warrant dated October 1, 1997
              
10.53           Employment Letter Agreement, dated August 11, 1997, between the
                Company and William C. Vincek, Ph.D.
              
11.3            Statement Re: Computation of Earnings (Loss) Per Share
              
27.3            Financial Data Schedule
</TABLE>


*  Confidential Treatment has been granted with respect to certain
   portions of this document.

                 B.       Report on Form 8-K

         On September 4, 1997, the Company filed a Current Report on Form 8-K,
the purpose of which was to summarize the material terms of the collaboration
between Amgen and the Company and to file as exhibits the press release
announcing the transaction and a copy of the Binding Term Sheet, dated August
20, 1997, between Amgen and the Company and GPI NIL Holdings, Inc.





                                       21
<PAGE>   22
                         GUILFORD PHARMACEUTICALS INC.
                                AND SUBSIDIARIES



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.




                                        Guilford Pharmaceuticals Inc.
                                 
                                 
                                 
                                 
Date:     November 12, 1997             /s/ Craig R. Smith, M.D.         
                                        ---------------------------------
                                        Craig R. Smith, M.D.
                                        President and CEO
                                 
                                 
                                 
Date:    November 12, 1997              /s/ Andrew R. Jordan             
                                        ---------------------------------
                                        Andrew R. Jordan
                                        Senior Vice President and Chief 
                                          Financial Officer
                                        (Principal Accounting Officer)





                                       22

<PAGE>   1
                                                                   EXHIBIT 10.50

================================================================================



                      STOCK AND WARRANT PURCHASE AGREEMENT

                                 BY AND BETWEEN

                         GUILFORD PHARMACEUTICALS INC.

                                      AND

                                   AMGEN INC.




                          Dated as of October 1, 1997



================================================================================
<PAGE>   2
                               TABLE OF CONTENTS


<TABLE>
<CAPTION>
                                                                                                                       PAGE
                                                                                                                       ----
<S>                                                                                                                       <C>
SECTION 1.  Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   1
                                                                                                                       
SECTION 2.  Issuance and Sale of Securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   3
                                                                                                                       
SECTION 3.  Closing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   3
         (a)       Closing  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   3
         (b)       Documents to be Delivered  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   3
                                                                                                                       
SECTION 4.  Representations and Warranties of the Company . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   3
         (a)       Organization and Standing  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   3
         (b)       Capitalization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   3
         (c)       Issuance of Shares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   4
         (d)       Authority for Agreement  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   4
         (e)       Governmental Consents  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
         (f)       Litigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
         (g)       SEC Filings; Financial Statements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
         (h)       No Undisclosed Liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   6
         (i)       Absence of Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   6
         (j)       Intellectual Property  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   6
         (k)       No Defaults  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   6
         (l)       Offerings  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   6
         (m)       Brokers  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   7
                                                                                                                       
SECTION 5.  Representations and Warranties of Buyer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   7
         (a)       Investment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   7
         (b)       Authority  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   7
         (c)       Accredited Investor  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   7
         (d)       Brokers  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   7
                                                                                                                       
SECTION 6.  Closing Conditions  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   7
         (a)       Conditions to Buyer's Obligation to Close  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   7
         (b)       Conditions to Company's Obligation to Close  . . . . . . . . . . . . . . . . . . . . . . . . . . . .   8
                                                                                                                       
SECTION 7.  Standstill  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   8
                                                                                                                       
SECTION 8.  Survival and Indemnification  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   8
         (a)       Survival of Representations, Etc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   8
         (b)       Indemnification  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   9
</TABLE>





                                       i
<PAGE>   3
<TABLE>
<CAPTION>
                                                                                                                       PAGE
                                                                                                                       ----
<S>                                                                                                                      <C>
SECTION 9.  Miscellaneous   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   9
         (a)       Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   9
         (b)       Successors and Assigns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   9
         (c)       Notices  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   9
         (d)       Choice of Law  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10
         (e)       Entire Agreement; Amendments and Waivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10
         (f)       Counterparts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
         (g)       Invalidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
         (h)       Headings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
         (i)       Expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
         (j)       Specific Enforcement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
         (k)       Further Assurances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11

TABLE OF SCHEDULES

         Schedule 4(b) - Capitalization
         Schedule 4(j) - Intellectual Property
</TABLE>





                                       ii
<PAGE>   4

                      STOCK AND WARRANT PURCHASE AGREEMENT


                 THIS STOCK AND WARRANT PURCHASE AGREEMENT (the "Agreement") is
dated as of October 1, 1997 and entered into by and between GUILFORD
PHARMACEUTICALS INC., a Delaware corporation (the "Company") and AMGEN INC., a
Delaware corporation ("Buyer").

                                    RECITALS

                 WHEREAS, the Company, GPI NIL Holdings, Inc., a Delaware
corporation and wholly-owned subsidiary of the Company, and Buyer have entered
into a collaboration with respect to the research, development and
commercialization of certain small molecule neuroimmunophilin compounds, and
have executed a Binding Term Sheet dated as of August 20, 1997 relating thereto
(the "Binding Term Sheet").

                 WHEREAS, in connection with the foregoing, Buyer has agreed to
purchase from the Company, and the Company has agreed to sell to Buyer, (i)
640,095 shares of the Company's Common Stock (the "Shares"), and (ii) a Warrant
for the purchase of 700,000 Shares of Common Stock of the Company (the
"Warrant," and together with the Shares, the "Securities").  The Warrant is
attached hereto as Exhibit A.  Subject to adjustment as set forth in the
Warrant, the Warrant shall be exercisable for 700,000 shares of Common Stock
(individually, a "Warrant Share" and collectively, the "Warrant Shares"); and

                 WHEREAS, Buyer and the Company desire to provide for the
foregoing purchases and sales and to establish various rights and obligations
in connection therewith;

                                   AGREEMENT

                 NOW, THEREFORE, in consideration of the mutual covenants and
premises contained herein and for other good and valuable consideration the
receipt and adequacy of which are hereby acknowledged, the parties hereto agree
as follows:

                 SECTION 1.  Definitions.

                 (a)      As used in this Agreement, the terms below shall have
the following meanings:

                 "Charter Documents" shall mean the Amended and Restated
Certificate of Incorporation and the Amended and Restated Bylaws of the
Company, each as amended to date and presently in effect.

                 "Closing Date" shall mean October 1, 1997.

                 "Collateral Agreements" shall mean the Binding Term Sheet, the
Warrant and the Registration Rights Agreement.

                 "Commission" shall mean the Securities and Exchange
Commission.
<PAGE>   5
                 "Common Stock" shall mean the shares of the Common Stock, $.01
par value per share, of the Company.

                 "Exchange Act" shall mean the Securities Exchange Act of 1934,
as amended, and the rules and regulations of the Commission thereunder.

                 "HSR Act" shall mean the Hart-Scott-Rodino Antitrust
Improvements Act of 1976, as amended.

                 "Person" shall mean any individual, firm, corporation,
partnership, limited liability company, trust, unincorporated organization or
other entity or a government or agency or political subdivision thereof, and
shall include any successor (by merger or otherwise) of such Person.

                 "Preferred Stock" shall mean the shares of undesignated
Preferred Stock, par value $.01 per share, of the Company.

                 "Registration Rights Agreement" shall mean the Registration
Rights Agreement to be entered into as of the date hereof by and between the
Company and Buyer.

                 "Securities Act" shall mean the Securities Act of 1933, as
amended, and the rules and regulations of the Commission thereunder.

                 "Series A Preferred Stock" shall mean the shares of the Series
A Junior Participating Preferred Stock, par value $.01 per share, of the
Company.

                 (b)      Other Defined Terms.  The following terms shall have
the meanings defined for such terms in the Sections set forth below:

<TABLE>
<CAPTION>
   Term                                   Section
   ----                                   -------
   <S>                                    <C>
   Binding Term Sheet                     Preamble
   Buyer                                  Preamble
   Closing                                  3(a)
   Company                                Preamble
   Company SEC Reports                      4(g)
   Securities                             Recitals
   Securities Purchase Price                 2
   Shares                                 Recitals
   Warrant                                Recitals
   Warrant Agreement                      Recitals
   Warrant Share                          Recitals
   Warrant Shares                         Recitals
</TABLE>

                 SECTION 2.  Issuance and Sale of Securities.





                                       2
<PAGE>   6
                 Upon the terms set forth herein, the Company hereby agrees to
issue and sell to Buyer, and Buyer hereby agrees to purchase the Securities for
an aggregate purchase price of $20 Million (the "Securities Purchase Price").
Buyer hereby subscribes for and agrees to purchase from the Company, in
immediately available funds, (i) 640,095 Shares of the Company's Common Stock
for a cash purchase price of $15 million (calculated by reference to the
closing prices of the Company's Common Stock for the 20 consecutive trading
days ending on and including August 19, 1997 amounting to $23.434 per share),
and (ii) a Warrant to purchase 700,000 shares of the Company's Common Stock for
a cash purchase price of $5 million.

                 SECTION 3.  Closing.

                 (a)      Closing.  The closing of the transactions
contemplated hereby (the "Closing") will take place on the Closing Date at 9:00
a.m. local time at the offices of Latham & Watkins, 633 West Fifth Street, Los
Angeles, California 90071 or at such other time or place as the parties hereto
shall mutually agree.

                 (b)      Documents to be Delivered.  At the Closing, the
Company shall deliver to Buyer, against payment in full of the Securities
Purchase Price by wire transfer in same day funds to the account(s) the Company
shall have designated in writing at least one business day prior to the Closing
Date, the agreements, certificates and documents as set forth in Section 6.

                 SECTION 4.  Representations and Warranties of the Company.

                 The Company hereby represents and warrants to Buyer as of the
date hereof as follows:

                 (a)      Organization and Standing.  The Company is a
corporation duly organized and validly existing under the laws of the State of
Delaware and has requisite corporate power and authority to own and lease its
property, to conduct its business as presently conducted and as proposed to be
conducted by it and to execute and deliver this Agreement and each of the
Collateral Agreements.  The Company has requisite corporate power and authority
to perform and to carry out the transactions contemplated by this Agreement and
each of the Collateral Agreements.  The Company is qualified to do business and
in good standing in Delaware and in each jurisdiction where it does business or
owns property except those jurisdictions where the failure to be so qualified
and in good standing would not have a material adverse effect on its business
or property.  The Company has furnished to Buyer true and complete copies of
the Charter Documents.

                 (b)      Capitalization.  As of the date hereof, the
authorized capital stock of the Company consists of the following:  (i)
40,000,000 shares of Common Stock, of which 18,700,335 shares are issued and
outstanding as of September 26, 1997, (ii) 4,700,000 shares of Preferred Stock,
of which no shares are issued and outstanding, and (iii) 300,000 shares of
Series A Preferred Stock, of which no shares are issued and outstanding.  All
of the issued and outstanding shares of Common Stock, have been duly
authorized, and are validly issued and are fully paid and non-assessable.
Except as set forth in the Company SEC Reports or on Schedule





                                       3
<PAGE>   7
4(b) hereto or as provided in this Agreement, there is not, nor upon the
consummation of the transactions contemplated herein, will there be, (i) any
subscription, warrant, option, convertible security or other right (contingent
or otherwise) to purchase or acquire any shares of capital stock of the
Company,  (ii) any commitment of the Company to issue any subscription,
warrant, option, convertible security or other such right or to issue or
distribute to holders of any shares of its capital stock any evidences of
indebtedness or assets of the Company, or (iii) any obligation of the Company
(contingent or otherwise) to purchase, redeem or otherwise acquire any shares
of its capital stock or any interest therein or to pay any dividend or make any
other distribution in respect thereof.  Except as set forth in the Company SEC
Reports or on Schedule 4(b) or as provided in this Agreement, no Person is
entitled to, nor upon the consummation of the transactions contemplated herein
will any Person be entitled to, (i) any preemptive or similar right with
respect to the issuance of any capital stock of the Company, or (ii) any rights
with respect to the registration of any capital stock of the Company under the
Securities Act.  In addition, as of September 26, 1997, a total of 2,892,546
shares of Common Stock were reserved for issuance under outstanding options,
warrants and exchange rights.

                 (c)      Issuance of Shares.  The issuance, sale and delivery
of the Securities in accordance with this Agreement, and the issuance and
delivery of the Warrant Shares issuable upon exercise of the Warrant, have been
duly authorized and reserved for issuance, as the case may be, by all necessary
corporate action on the part of the Company (no consent or approval of the
stockholders of the Company being required by law, by the Charter Documents, or
the qualification criteria of the Nasdaq National Market), and the Securities
when so issued, sold and delivered against payment therefor in accordance with
the provisions of this Agreement, and the Warrant Shares issuable upon exercise
of the Warrant, when issued upon such exercise, will be (i) duly and validly
issued, fully paid and non-assessable and not subject to preemptive or any
other similar rights of the shareholders of the Company or others and free, at
time of issuance, of all restrictions on transfer subject to restrictions on
transfer resulting from applicable federal and state securities laws and (ii)
free and clear of all liens, charges, restrictions, claims and encumbrances.

                 (d)      Authority for Agreement.  The execution, delivery and
performance by the Company of this Agreement and each of the Collateral
Agreements have been duly authorized by all necessary corporate action, and
this Agreement and each of the Collateral Agreements have been duly executed
and delivered and constitute valid and binding obligations of the Company
enforceable in accordance with their respective terms, subject to applicable
bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and
other similar laws in effect relating to or affecting the rights of creditors
generally and subject, as to enforceability, to general principles of equity.
Except as disclosed in the Binding Term Sheet, the execution and delivery by
the Company of this Agreement and each of the Collateral Agreements, and the
consummation by the Company of the transactions contemplated hereby and thereby
(including, without limitation, the issuance and sale of the Securities and the
Warrant Shares), will not violate any provision of law to which the Company is
subject and will not in any material respect conflict with or result in any
breach of any of the terms, conditions or provisions of, or constitute a
default under, or result in the creation of any lien, security interest, charge
or encumbrance upon any of the properties, assets or outstanding capital stock
of the Company, the Charter Documents, or any indenture, lease, agreement or
other instrument to





                                       4
<PAGE>   8
which the Company is a party or by which it or any of its properties is bound,
or any decree, judgment, order, statute, rule or regulation applicable to the
Company; provided, however, that no such conflict, without respect to
materiality, will cause any provision of this Agreement or each of the
Collateral Agreements to become invalid or unenforceable.

                 (e)      Governmental Consents.  No consent, approval, order
or authorization of, or registration, qualification, designation, declaration
or filing with, any governmental or regulatory authority is required on the
part of the Company in connection with the execution and delivery of this
Agreement and each of the Collateral Agreements, and the consummation of the
transactions contemplated hereby and thereby (including, without limitation,
the offer, issue, sale and delivery of the Securities and the Warrant Shares
issuable upon exercise of the Warrant), except such filings as shall have been
made or consents or approvals obtained prior to and which shall be effective on
and as of the Closing.  Based in part on the representations made by Buyer in
Section 5 of this Agreement, the offer and sale of the Securities to Buyer will
be in compliance with applicable federal and state securities laws.

                 (f)      Litigation.  Except as set forth in the Company SEC
Reports and the Binding Term Sheet, there are no material actions, suits,
proceedings or investigations, either at law or in equity, or before any
commission or other administrative authority in any United States or foreign
jurisdiction, of any kind now pending or, to the best of the Company's
knowledge, threatened or proposed involving the Company or any of its
properties or assets or which question the validity or legality of the
transactions contemplated hereby, or to the best of the Company's knowledge,
against its employees or consultants with respect to the Company's business.

                 (g)      SEC Filings; Financial Statements.

                          (i)  The Company has filed all forms, reports and
documents required to be filed with the Commission under the Exchange Act since
January 1, 1995 (collectively, the "Company SEC Reports").  The Company SEC
Reports (i) were prepared in all material respects in accordance with the
requirements of the Exchange Act, and (ii) did not at the time they were filed
(or if amended or superseded by a filing prior to the date of this Agreement,
then on the date of such filing) contain any untrue statement of a material
fact or omit to state a material fact required to be stated therein or
necessary in order to make the statements therein, in the light of the
circumstances under which they were made, not misleading.

                          (ii)    Each of the financial statements (including,
in each case, any related notes thereto) contained in the Company SEC Reports
was prepared in accordance with generally accepted accounting principles
applied on a consistent basis throughout the periods involved (except as may be
indicated in the notes thereto), and each was complete and correct in all
material respects and presented fairly in all material respects presented the
financial position of the Company as at the respective dates thereof and the
results of its operations and cash flows for the periods indicated, except that
the unaudited interim financial statements were or are subject to normal and
recurring year-end adjustments which were not or are not expected to be
material in amount.





                                       5
<PAGE>   9
                 (h)      No Undisclosed Liabilities.  The Company does not
have any material liabilities (absolute, accrued, contingent or otherwise)
except liabilities (i) in the aggregate adequately provided for or otherwise
disclosed in the Company's balance sheet (including any related notes thereto)
for the fiscal quarter ended June 30, 1997 included in the Company's  Quarterly
Report on Form 10-Q for the fiscal quarter ended June 30, 1997 or in the
Company SEC Reports, or (ii) incurred since June 30, 1997 in the ordinary
course of business.

                 (i)      Absence of Changes.  Since June 30, 1997, there has
been no material adverse change in the financial condition, business, or assets
of the Company.

                 (j)      Intellectual Property.

                          (i)     To the best of the Company's knowledge, it
has done nothing to compromise in any material respect the secrecy,
confidentiality or value of any of its trade secrets, know-how, inventions,
prototypes, designs, processes or technical data required to conduct its
business as now conducted or as proposed to be conducted.  The Company will
continue to take reasonable security measures in the future, as it presently is
doing, to protect the secrecy, confidentiality, and value of all of its trade
secrets, know-how, inventions, prototypes, designs, processes, and technical
data important to the conduct of its business.

                          (ii)    Except as set forth in the Company SEC
Reports and Schedule 4(j) hereto, the Company has not granted rights to
manufacture, produce, license, market or sell its products to any other Person
and is not bound by any agreement that affects the Company's exclusive right to
develop, manufacture, distribute, market or sell its products.

                 (k)      No Defaults.  The Company is not in default (i) under
its Charter Documents, or any indenture, mortgage, lease agreement, contract,
purchase order or other instrument to which it is a party or by which it or any
of its property is bound or affected, or (ii) with respect to any order, writ,
injunction or decree of any court of any federal, state, municipal or other
governmental department, commission, board, bureau, agency or instrumentality,
domestic or foreign, which defaults, either singly or in the aggregate, would
have a material adverse effect on the Company.  At the time of the Closing, to
the best knowledge of the Company, there will exist no condition, event or act
which constitutes, or which after notice, lapse of time or both would
constitute, a material default under any of the foregoing which, either singly
or in the aggregate, would have a material adverse effect on the Company.

                 (l)      Offerings.  Except as contemplated by this Agreement
or as otherwise disclosed by the Company to Buyer, the Company has no current
plans or intentions, within six months from the date hereof, to issue any
shares of its capital stock or any other securities or any securities
convertible or exchangeable into shares of its capital stock or any other
securities, except for securities issuable under approved employee benefit
plans.

                 (m)      Brokers.  No broker, finder or investment banker is
entitled to any brokerage, finder's or other fee or commission in connection
with the transactions contemplated by this Agreement based upon arrangements
made by or on behalf of the Company.





                                       6
<PAGE>   10
                 SECTION 5.  Representations and Warranties of Buyer.

                 Buyer hereby represents and warrants to the Company as of the
date hereof as follows:

                 (a)      Investment.  Buyer is acquiring the Securities, and
the Warrant Shares into which the Warrants may be exercised, for its own
account (and not for the account of others) for investment and not with a view
to any distribution thereof within the meaning of the Securities Act.

                 (b)      Authority.  Buyer has requisite power and authority
to execute, deliver and perform this Agreement and each of the Collateral
Agreements in accordance with their respective terms.  The execution, delivery
and performance by Buyer of this Agreement and each of the Collateral
Agreements have been duly authorized by all necessary corporate action, and
this Agreement and each of the Collateral Agreements have been duly executed
and delivered and constitute valid and binding obligations of Buyer enforceable
in accordance with their respective terms, subject to applicable bankruptcy,
insolvency, fraudulent conveyance, reorganization, moratorium and other similar
laws in effect relating to or affecting the rights of creditors generally and
subject, as to enforceability, to general principles of equity.  The execution
and delivery by Buyer of this Agreement and each of the Collateral Agreements,
and the consummation by Buyer of the transactions contemplated hereby and
thereby, will not violate any provision of law to which Buyer is subject and
will not conflict with or result in any breach of any of the terms, conditions
or provisions of, or constitute a default under, or result in the creation of
any lien, security interest, charge or encumbrance upon any of the properties,
assets or outstanding capital stock of Buyer, the Charter Documents, or any
indenture, lease, agreement or other instrument to which Buyer is a party or by
which it or any of its properties is bound, or any decree, judgment, order,
statute, rule or regulation applicable to Buyer.  Buyer represents that it has
not been organized, reorganized or recapitalized specifically for the purpose
of investing in the Company.

                 (c)      Accredited Investor.  Buyer is an Accredited Investor
within the definition set forth in Rule 501(a) under the Securities Act.

                 (d)      Brokers.  No broker, finder or investment banker is
entitled to any brokerage, finder's or other fee or commission in connection
with the transactions contemplated by this Agreement based upon arrangements
made by or on behalf of Buyer.

                 SECTION 6.  Closing Conditions.

                 (a)      Conditions to Buyer's Obligation to Close.  The
obligation of Buyer to consummate the transactions contemplated hereby are
subject to the satisfaction, on or prior to the Closing Date, of the delivery
by the Company of the following:  (i) certificates for the Shares in such
denominations as Buyer has requested, dated the Closing Date and registered in
the name of Buyer or its nominees as specified by Buyer, (ii) the Warrant,
dated the Closing Date and registered in the name of Buyer or its nominees as
specified by Buyer, (iii) each of the Collateral Agreements, which shall have
been duly authorized, executed and delivered by the





                                       7
<PAGE>   11
Company and shall be in full force and effect, (iv) an officers' certificate
certifying as to the incumbency of the officers of the Company executing this
Agreement and the Collateral Agreements and the resolutions of the Board of
Directors authorizing the execution, delivery and performance of the Agreement
and the Collateral Agreements, (v) a Certificate of Good Standing (long-form if
available), and (vi) an opinion of Hogan & Hartson, L.L.P., counsel to the
Company, in form and substance reasonably satisfactory to Buyer, and attached
hereto as Exhibit A, with such exceptions and qualifications as are customary
and reasonable under the law of the applicable jurisdiction.  In rendering such
opinion, such counsel may rely upon certificates of public officers and, as
matters of fact, upon certificates of duly authorized representatives of the
Company; provided, that copies of such certificates shall be contemporaneously
delivered to Buyer.

                 (b)      Conditions to Company's Obligation to Close.  The
obligation of the Company to consummate the transactions contemplated hereby is
subject to the satisfaction, on or prior to the Closing Date, of the payment by
Buyer of the Securities Purchase Price as provided for in Section 2 hereof.

                 SECTION 7.  Standstill.

                 During the ten-year period commencing on the date hereof,
without the written consent of the Company, Buyer shall not directly or
indirectly acquire more than 10% of the Company's then outstanding capital
stock.  Notwithstanding the foregoing, if any person or group (for the purposes
of this Section 7, "person" and "group" shall have the respective meanings
ascribed to such terms pursuant to Regulation 13D adopted by the Commission
under the Exchange Act, as in effect on the date hereof), directly or
indirectly acquires more than 10% of the Company's then outstanding capital
stock, Buyer may acquire up to the same percentage acquired by such person or
group; provided, however, Buyer is not and does not become a member of such
group.  If any person or group, directly or indirectly, makes an offer to
tender or exchange for the Company's capital stock, Buyer shall be relieved of
its obligations hereunder; provided, however, that Buyer shall not be so
relieved if Buyer solicits, encourages or participates in any such offer to
tender or exchange.  Nothing herein shall prohibit Buyer from making any
proposal to the Company's Board of Directors.

                 SECTION 8.  Survival and Indemnification.

                 (a)      Survival of Representations, Etc.  All
representations and warranties contained herein shall survive the execution and
delivery of this Agreement and the Collateral Agreements and the closing of the
transactions contemplated hereby and thereby until the first anniversary of the
date of this Agreement (or until final resolution of any claim or action
arising from the untruth, inaccuracy or breach of any such representation and
warranty, if notice of such untruth, inaccuracy or breach was given prior to
such first anniversary) without regard to any investigation made by any of the
parties hereto.  All statements contained in any certificate or other
instrument delivered by the Company pursuant to this Agreement and denominated
as representations and warranties shall constitute representations and
warranties by the Company under this Agreement.  All agreements and covenants
contained herein shall survive indefinitely until, by their respective terms,
they are no longer operative.





                                       8
<PAGE>   12
                 (b)      Indemnification.  The parties shall, with respect to
the representations, warranties, covenants and agreements made herein or in
certificates or other instruments delivered in connection therewith, indemnify,
defend and hold the non-breaching party harmless against all liability,
together with all reasonable costs and expenses related thereto (including
legal and accounting fees and expenses), arising from the untruth, inaccuracy
or breach of any such representations, warranties, covenants or agreements of
the breaching party.

                 SECTION 9.  Miscellaneous.

                 (a)      Legend.  (i)  Each certificate representing Shares
sold pursuant to the provisions hereof, if deemed advisable by the Company,
shall bear the following legends:

                 "THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN
         REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY NOT
         BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR HYPOTHECATED
         UNLESS AND UNTIL SUCH SHARES ARE REGISTERED UNDER SUCH ACT OR AN
         OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE COMPANY IS OBTAINED
         TO THE EFFECT THAT SUCH REGISTRATION IS NOT REQUIRED."

                          (ii)    Buyer hereby agrees not to offer, sell or
otherwise transfer the Shares in violation of the foregoing legend or
applicable state and federal securities laws.

                          (iii)   The Company shall have no obligation to
register a transfer of the Shares on its books, unless the conditions specified
in the legend in subclause (i) above are satisfied, and the Company may
instruct its transfer agent not to register the transfer of any of the Shares
unless the conditions specified in the foregoing legend are satisfied.

                 (b)      Successors and Assigns.  This Agreement shall be
binding upon and inure to the benefit of the parties hereto and their
respective successors and assigns, and no other Person shall have any right,
benefit or obligation hereunder.

                 (c)      Notices.  Unless otherwise provided herein, any
notice, request, instruction or other document to be given hereunder by any
party to the others shall be in writing and delivered in person or by courier,
or by facsimile transmission (with receipt confirmed) or mailed by certified
mail, postage prepaid, return receipt requested (such mailed notice to be
effective on the date of such receipt is acknowledged), as follows:





                                       9
<PAGE>   13
         If to the Company:

                          Guilford Pharmaceuticals Inc.
                          6611 Tributary Street
                          Baltimore, Maryland  21224
                          Attn: Corporate Secretary
                          Telecopy No.: (410) 631-6899

         With a copy to:

                          Hogan & Hartson, L.L.P.
                          111 South Calvert Street, 16th Floor
                          Baltimore, Maryland  21202
                          Attn:  Michael Silver, Esq.
                          Telecopy No.: (410) 539-6981
         If to Buyer:

                          Amgen Inc.
                          Amgen Center
                          1840 DeHavilland Drive
                          Thousand Oaks, California 91320-1789
                          Attn: Corporate Secretary
                          Telecopy No.: (805) 499-8011

         With a copy to:

                          Latham & Watkins
                          633 West Fifth Street, Suite 4000
                          Los Angeles, California 90071
                          Attn: Gary Olson, Esq.
                          Telecopy No.: (213) 891-8763

or to such other place and with such other copies as either party may designate
as to itself by written notice to the others.

                 (d)      Choice of Law.  This Agreement shall be construed,
interpreted and the rights of the parties determined in accordance with the
laws of the State of Delaware (excluding choice of law provisions).

                 (e)      Entire Agreement; Amendments and Waivers.  This
Agreement, together with the Collateral Agreements, constitutes the entire
agreement among the parties pertaining to the subject matter hereof and thereof
and supersedes all prior agreements, understandings, negotiations and
discussions, whether oral or written, of the parties.  No supplement,
modification or waiver of this Agreement shall be binding unless executed in
writing by the party to be bound thereby.  No waiver of any of the provisions
of this Agreement shall be





                                       10
<PAGE>   14
deemed or shall constitute a waiver of any other provision hereof (whether or
not similar), nor shall such waiver constitute a continuing waiver unless
otherwise expressly provided.

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

                 (g)      Invalidity.  In the event that any one or more of the
provisions contained in this Agreement or in any other instrument referred to
herein, shall, for any reason, be held to be invalid, illegal or unenforceable
in any respect, such invalidity, illegality or unenforceability shall not
affect any other provision of this Agreement or any other such instrument.

                 (h)      Headings.  The headings of the Articles and Sections
herein are inserted for convenience of reference only and are not intended to
be a part of or to affect the meaning or interpretation of this Agreement.

                 (i)      Expenses.  Each of the Company and Buyer will each be
liable for its own costs and expenses incurred in connection with the
negotiation, preparation, execution and performance of this Agreement.

                 (j)      Specific Enforcement.  The Company and Buyer
acknowledge and agree that if any of the provisions of this Agreement were not
performed in accordance with their specific terms or were otherwise breached,
irreparable damage would occur and it would be extremely impracticable and
difficult to measure damages.  Accordingly, in addition to any other rights and
remedies to which the parties may be entitled by law or equity, the parties
shall be entitled to an injunction or injunctions to prevent or cure breaches
of the provisions of this Agreement and to enforce specifically the terms and
provisions hereof, and the parties expressly waive (i) the defense that a
remedy in damages will be adequate and (ii) any requirement, in an action for
specific performance, for the posting of a bond.

                 (k)      Further Assurances.  On and after the date hereof,
the Company and Buyer will take all appropriate action and execute all
documents, instruments or conveyances of any kind which may be reasonably
necessary to carry out any of the provisions hereof.



                           [Signature Page to follow]





                                       11
<PAGE>   15
                 IN WITNESS WHEREOF, the parties hereto have executed this
Agreement, or have caused this Agreement to be duly executed on their
respective behalf by their respective officers thereunto duly authorized, as of
the day and year first above written.


                          GUILFORD PHARMACEUTICALS INC.
                          
                          
                          By  /S/ CRAIG R. SMITH, M.D.                          
                              -------------------------------------------------
                              Name:     Craig R. Smith, M.D.
                              Title:    President and Chief Executive Officer
                          
                          
                          AMGEN INC.
                          
                          
                          By  /S/ GEORGE A. VANDEMAN                            
                              -------------------------------------------------
                              Name:     George A. Vandeman
                              Title:    Senior Vice President, General Counsel 
                                        and Secretary





                                      S-1
<PAGE>   16
                                 SCHEDULE 4(b)

                                 CAPITALIZATION



I.       Outstanding Subscriptions, Warrants, Options, Convertible Securities,
         or Registration Rights not Disclosed in the Company SEC Reports.

         (A)     Options and restricted shares granted under the Company's 1993
                 Employee Share Option and Restricted Share Plan, as amended
                 since December 31, 1996.

         (B)     Options and shares registered on the Company's Registration
                 Statement on Form S-8 filed with the Securities and Exchange
                 Commission on December 13, 1996.
<PAGE>   17
                                 SCHEDULE 4(j)

                             INTELLECTUAL PROPERTY



         1.      Pursuant to the DOPASCAN SUPPLY AGREEMENT, dated July 10,
1996, as amended, between Guilford Pharmaceuticals Inc.  and Nordion
International Inc. and Nordion Europe S.A., the Company granted certain supply
and other rights relating to supply of DOPASCAN(R) Injection for European Phase
II clinical trials.

         2.      Pursuant to the Development and Phase III Clinical Trial
Supply Agreement, dated May 22, 1997, as amended, between Guilford
Pharmaceuticals Inc. and MDS Nordion Inc. and MDS Nordion S.A., the Company
granted certain development and supply rights relating to Phase III clinical
trials of DOPASCAN(R) Injection as well as certain rights regarding commercial
supply of the product.


<PAGE>   1
                                                                   EXHIBIT 10.51


================================================================================


                         REGISTRATION RIGHTS AGREEMENT



                                 BY AND BETWEEN

                         GUILFORD PHARMACEUTICALS INC.

                                      and

                                   AMGEN INC.



                          Dated as of October 1, 1997


================================================================================
<PAGE>   2
                               TABLE OF CONTENTS


<TABLE>
<S>                                                                                                                   <C>
SECTION 1.  Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    1
                                                                                                                    
SECTION 2.  Securities Subject to this Agreement  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    3
         (a)     Registrable Securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    3
         (b)     Holders of Registrable Securities  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    3
                                                                                                                    
SECTION 3.  Demand Registrations  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    4
         (a)     Demand by Holders  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    4
         (b)     Effective Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    4
         (c)     Registration Statement Form  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    4
         (d)     Selection of Underwriters  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    5
         (e)     Registration of Other Securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    5
         (f)     Priority Among Holders of Registrable Securities in Requested Registration . . . . . . . . . . . .    5
         (g)     Registration Requirements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    5
                                                                                                                    
SECTION 4.  Piggyback Registrations.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    6
         (a)     Participation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    6
         (b)     Underwriter's Cutback  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    6
         (c)     No Effect on Demand Registrations  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    7
                                                                                                                    
SECTION 5.       Priority of Other Registration Rights  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    7
                                                                                                                    
SECTION 6.  Hold-Back Agreements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    7
         (a)     Restrictions Applicable to Holders of Registrable Securities . . . . . . . . . . . . . . . . . . .    7
         (b)     Registration Restrictions Applicable to the Company  . . . . . . . . . . . . . . . . . . . . . . .    7
                                                                                                                    
SECTION 7.  Registration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    8
                                                                                                                    
SECTION 8.  Registration Expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   13
                                                                                                                    
SECTION 9.  Indemnification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   14
         (a)     Indemnification by Company . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   14
         (b)     Indemnification by Holder of Registrable Securities  . . . . . . . . . . . . . . . . . . . . . . .   15
         (c)     Contribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   15
                                                                                                                    
SECTION 10.  Transfer of Registration Rights  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   16
                                                                                                                    
SECTION 11.  Rule 144 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   16
                                                                                                                    
SECTION 12.  Participation in Underwritten Registrations  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   17
                                                                                                                    
SECTION 13.  Miscellaneous  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   17
         (a)     Remedies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   17
         (b)     No Inconsistent Agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   17
</TABLE>
<PAGE>   3
<TABLE>
         <S>     <C>                                                                                                  <C>
         (c)     Amendments and Waivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   17
         (d)     Notices  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   17
         (e)     Successors and Assigns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   18
         (f)     Counterparts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   19
         (g)     Headings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   19
         (h)     Governing Law  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   19
         (i)     Severability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   19
         (j)     Entire Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   19
</TABLE>





                                       ii
<PAGE>   4

                         REGISTRATION RIGHTS AGREEMENT


                 THIS REGISTRATION RIGHTS AGREEMENT (the "Agreement") is dated
as of October 1, 1997 and entered into by and between GUILFORD PHARMACEUTICALS
INC., a Delaware corporation (the "Company"), and AMGEN INC., a Delaware
corporation (the "Purchaser").

                                    RECITALS

                 WHEREAS, the Company, GPI NIL Holdings, Inc., a Delaware
corporation and wholly-owned subsidiary of the Company, and the Purchaser have
entered into a collaboration with respect to the research, development and
commercialization of certain small molecule neuroimmunophilin compounds, and
have executed a Binding Term Sheet dated as of August 20, 1997 relating thereto
(the "Binding Term Sheet");

                 WHEREAS, in connection with the Binding Term Sheet, the
Purchaser has agreed to purchase from the Company, and the Company has agreed
to sell to the Purchaser, 640,095 shares of Common Stock and a Warrant for
700,000 shares of Common Stock for an aggregate cash consideration of $20
million;

                 WHEREAS, in connection with the foregoing, the Company and the
Purchaser have entered into a Stock and Warrant Purchase Agreement (the
"Purchase Agreement") dated as of October 1, 1997; and

                 WHEREAS, as contemplated by the Binding Term Sheet, the
Company has agreed to provide the registration rights set forth in this
Agreement;

                                   AGREEMENT

                 NOW, THEREFORE, in consideration of the mutual covenants and
premises contained herein and for other good and valuable consideration the
receipt and adequacy of which are hereby acknowledged, the parties hereto agree
as follows:

                 SECTION 1.  Definitions.

                 (a)      As used in this Agreement, the terms below shall have
the following meanings:

                 "Agent" shall mean any Person authorized to act and who acts
on behalf of the Purchaser with respect to the transactions contemplated by
this Agreement.

                 "Collateral Agreements" shall mean the Binding Term Sheet, the
Warrant and the Purchase Agreement.





                                       1
<PAGE>   5
                 "Common Stock" shall mean the Common Stock, $.01 par value, of
the Company. 

                 "Exchange Act" shall mean the Securities Exchange Act of 1934,
as amended from time to time.

                 "NASD" shall mean the National Association of Securities
Dealers, Inc.

                 "Person" shall mean an individual, firm, corporation,
partnership, limited liability company, trust or unincorporated organization,
or other entity, or a government or agency or political subdivision thereof,
and shall include any successor (by merger or otherwise) of such Person.

                 "Prospectus" shall mean the prospectus included in any
Registration Statement, as amended or supplemented by any prospectus supplement
with respect to the terms of the offering of any portion of the Registrable
Securities covered by the Registration Statement and by all other amendments
and supplements to the prospectus, including post-effective amendments and all
material incorporated by reference in such prospectus.

                 "Registrable Securities" shall mean (i) the Common Stock
acquired by the Purchaser pursuant to the terms of the Purchase Agreement, and
(ii) the Warrant Shares.  Registrable Securities shall also include any
securities which may be issued or distributed with respect to, or in exchange
for, such Registrable Securities pursuant to a stock dividend, stock split or
other distribution, merger, consolidation, recapitalization or reclassification
or similar transaction; provided, however, that any such Registrable Securities
shall cease to be Registrable Securities to the extent (i) a Registration
Statement with respect to the sale of such Registrable Securities has been
declared effective under the Securities Act and such Registrable Securities
have been disposed of in accordance with the plan of distribution set forth in
such Registration Statement, or (ii) such Registrable Securities can be
disposed of pursuant to Rule 144 without regard to Rule 144(k) (or any similar
provisions then in force) under the Securities Act.

                 "Registration" shall mean a Registration of the Company's
securities for sale to the public under a Registration Statement.

                 "Registration Statement" shall mean any Registration Statement
of the Company filed with the Securities and Exchange Commission under the
rules and regulations promulgated under the Securities Act, including the
Prospectus, amendments and supplements to such Registration Statement,
including post-effective amendments, and all exhibits and all material
incorporated by reference in such Registration Statement.

                 "Securities Act" shall mean the Securities Act of 1933, as
amended from time to time.

                 "SEC" shall mean the Securities and Exchange Commission.





                                       2
<PAGE>   6
                 "Underwritten Registration" or "Underwritten Offering" shall
mean a Registration in which securities of the Company are sold to an
underwriter for reoffering to the public.

                 "Warrant" shall mean the Warrant to purchase shares of Common
Stock, issued and sold pursuant to the Purchase Agreement dated as of the date
hereof, by and between the Company and the Purchaser.

                 "Warrant Shares" shall mean any shares of Common Stock issued
or issuable upon exercise of the Warrant.

                 (b)      Other Defined Terms.  The following terms shall have
the meanings defined for such terms in the Sections set forth below:

<TABLE>
<CAPTION>
   Term                                                                                            Section
   ----                                                                                            -------
   <S>                                                                                             <C>
   Agreement                                                                                       Preamble
   Company                                                                                         Preamble
   Demand Registration Holdback Period                                                               6(b)
   Demand Registration                                                                               3(a)
   Exchange and Registration Rights Agreement                                                         5
   Holder                                                                                            2(b)
   Indemnified Holder                                                                                9(a)
   Piggyback Registration                                                                            4(a)
   Piggyback Securities                                                                              4(b)
   Preferred Stock Purchase Agreement                                                                 5
   Priority Agreements                                                                                5
   Purchase Agreement                                                                              Recitals
   Purchaser                                                                                       Preamble
   Registration Expenses                                                                           8(a)(7)
   Underwriter's Warrant                                                                              5
</TABLE>

                 SECTION 2.  Securities Subject to this Agreement.

                 (a)      Registrable Securities.  The securities entitled to
the benefits of this Agreement are the Registrable Securities.

                 (b)      Holders of Registrable Securities.  Initially,
Purchaser is the only holder of Registrable Securities, and Registrable
Securities shall only refer to such securities owned of record or beneficially
by Purchaser or by a transferee (or subsequent transferee) of Purchaser
pursuant to Section 10 hereof who has thereby acquired rights hereunder (each a
"Holder").  Subject to the foregoing, a Person is deemed to be a Holder of
Registrable Securities whenever such Person owns Registrable Securities or has
the right to acquire such Registrable Securities, whether or not such ownership
or right was acquired pursuant to the Purchase Agreement or the Warrant, and
whether or not such acquisition has actually been effected and disregarding any
legal restrictions upon the exercise of such right.





                                       3
<PAGE>   7
                 SECTION 3.  Demand Registrations.

                 (a)      Demand by Holders.  During the five-year period
commencing on the date hereof, the Holders of at least 50% of the Registrable
Securities then outstanding may make a total of three written requests to the
Company for Registration of Registrable Securities under and in accordance with
the provisions of the Securities Act of all or part of the Registrable
Securities.  Any such Registration requested shall hereinafter be referred to
as a "Demand Registration."  Each request for a Demand Registration shall
specify the kind and aggregate amount of Registrable Securities to be
registered, the intended methods of disposition thereof and the information
required by Item 507 of Regulation S-K under the Securities Act.  Upon such
request for a Demand Registration, subject to Section 3(g) below, the Company
shall use its best efforts to promptly effect the Registration of such
Registrable Securities under (i) the Securities Act, and (ii) subject to
Section 7(h), the blue sky laws of such jurisdictions as any Holder of such
Registrable Securities requesting such Registration or any underwriter, if any,
may reasonably request.  The Company shall also use its best efforts to have
all such Registrable Securities registered with or approved by such other
federal or state governmental agencies or authorities as may be necessary in
the opinion of counsel to the Company and counsel to such Holders of at least
50% of such Registrable Securities to consummate the disposition of such
Registrable Securities.

                 (b)      Effective Registration.  Subject to the last
paragraph of Section 7, the Company shall be deemed to have effected a Demand
Registration if the Registration Statement relating to such Demand Registration
is filed with the SEC but the requesting Holders inform the Company that they
desire that the Registration Statement be withdrawn or abandoned; provided,
however, that such withdrawal does not result from action or inaction on the
part of the Company that has materially and adversely affected the value of
such registration to the participating Holders, or if the Registration
Statement is declared effective by the SEC and remains effective until the
earlier of the date on which (i) all the Registrable Securities subject to such
Registration Statement have been disposed of pursuant thereto or (ii) nine
months have elapsed from the date of such effectiveness; provided, however,
that no Demand Registration shall be deemed to have been effected if (i) such
Registration, after it has become effective, is the subject of any stop order,
injunction or other order or requirement of the SEC or other governmental
agency or court for any reason not primarily attributable to the selling
Holders of Registrable Securities, or (ii) the conditions to closing specified
in the purchase agreement or underwriting agreement entered into in connection
with such Registration are not satisfied, other than by reason of a failure on
the part of the selling Holders of Registrable Securities or any underwriter
referred to in Section 3(d).

                 (c)      Registration Statement Form.  Registrations under
this Section 3 shall be on such appropriate registration form of the SEC as
shall permit the disposition of such Registrable Securities in accordance with
the intended method or methods of disposition specified in such Holders'
requests for such Registration.  If, in connection with any Registration under
this Section 3 which is proposed by the Company to be on Form S-3 or any
successor form to such Form, the managing underwriter (if any) or Holders of at
least 50% of the Registrable Securities requesting a Demand Registration shall
advise the Company in writing that in its opinion additional disclosure not
required by such form is of material importance to the success





                                       4
<PAGE>   8
of the offering, then the Company shall consider including such additional
disclosure, subject at all times to the Company's ultimate discretion to
include or not include any additional disclosure.

                 (d)      Selection of Underwriters.  If at any time or from
time to time during the time period applicable to Demand Registrations any of
the Holders of the Registrable Securities covered by a Registration Statement
desire to sell Registrable Securities in an Underwritten Offering, the
investment banker or investment bankers that will manage the offering will be
selected by the Holders of at least 50% of the Registrable Securities included
in such offering; provided that the selection of any such investment banker or
investment bankers is subject to consent by the Company, which consent shall
not be unreasonably withheld.

                 (e)      Registration of Other Securities.  Subject to Section
5 hereof, whenever the Company shall effect a Registration pursuant to this
Section 3 in connection with an Underwritten Offering by one or more Holders of
Registrable Securities, securities other than Registrable Securities shall be
reduced to the extent determined necessary by the managing underwriter of such
offering if such managing underwriter shall have advised such selling Holders
to be covered by such Registration in writing (with a copy to the Company)
that, in its opinion, the number of securities requested to be included in such
Registration exceeds the number which can be sold in such offering within a
price range acceptable to the selling Holders of at least 50% of the
Registrable Securities requested to be included in such Registration.  If no
such notice or letter is provided, the Company may include shares of Common
Stock for its own account or for the account of other shareholders of the
Company having the right to include such shares in a Registration Statement
filed by the Company with the SEC.

                 (f)      Priority Among Holders of Registrable Securities in
Requested Registration.  If the managing underwriter of an Underwritten
Offering pursuant to this Section 3 advises each of the Holders in writing
(with a copy to the Company) that less than all of the Registrable Securities
proposed to be included in such offering should be included (using the same
standard described in subsection (e) hereof), then the amount of Registrable
Securities to be offered for the accounts of Holders shall be reduced pro rata,
based on the number of Registrable Securities owned by such Holders.

                 (g)      Registration Requirements.  Anything in this Section
3 to the contrary notwithstanding, the Company shall not be required to file
any Registration Statement pursuant to this Section 3, (i) within a period of
six months after the effective date of any other Registration Statement filed
pursuant to a Demand Registration, (ii) for a deferral period of up to 90 days
if the Board of Directors of the Company in good faith determines that such
Registration would interfere with any proposed offering of shares of the
Company's capital stock, pending financing transaction, or acquisition,
corporate reorganization or other significant transaction involving the
Company; provided that the Company shall be able to defer Registration under
this subclause (ii) only one time in any 12-month period, (iii) for a period
beginning on the effective date of any Registration Statement and ending 90
days thereafter, or (iv) if the estimated aggregate proceeds of an offering of
Registrable Securities (less underwriting discounts and commissions) will be
less than $15 million.





                                       5
<PAGE>   9
                 SECTION 4.  Piggyback Registrations.

                 (a)      Participation.  Subject to Sections 4(b) and 5
hereof, if at any time from and after the date hereof, the Company proposes to
file or files a Registration Statement under the Securities Act with respect to
any offering of securities of the same type as the Registrable Securities for
its own account (other than a Registration Statement on Form S-8 or Form S-4 or
any successor form thereto), or for the account of any securityholder of
securities of the same type as the Registrable Securities, then, as promptly as
practicable, the Company shall give written notice of such proposed filing to
each Holder of Registrable Securities and such notice shall offer the Holders
of Registrable Securities the opportunity to include in such registration such
number of Registrable Securities as each such Holder may request (a "Piggyback
Registration").  Subject to Section 5, the Company shall include in such
Registration Statement all Registrable Securities requested within 20 days
after the receipt of any such notice (which request shall specify the
Registrable Securities intended to be disposed of by such Holder) to be
included in the Registration for such offering pursuant to a Piggyback
Registration.  Each Holder electing to participate in such Registration
Statement shall do so pursuant to the terms of such proposed registration and
shall execute such usual and customary custody agreements, powers of attorney,
underwriting agreements, holdback agreements or other documents as are
reasonably requested or required by the Company and any underwriter of such
offering as provided in Section 12 hereof; provided that Holder shall not be
required to represent and warrant to, or to indemnify, any party with respect
to any matters other than as to the Holder's ownership of the Registrable
Securities and with respect to any other information provided by Holder and
required to be included in the Registration Statement pursuant to SEC Rules and
Regulations.  Each Holder of Registrable Securities shall be permitted to
withdraw all or part of such Holder's Registrable Securities from a Piggyback
Registration at any time prior to the effective date thereof.

                 (b)      Underwriter's Cutback.  The Company shall use its
best efforts to cause the managing underwriter or underwriters of a proposed
Underwritten Offering to permit the Registrable Securities requested to be
included in the Registration for such offering under Section 4(a) (the
"Piggyback Securities") to be included on the same terms and conditions as any
similar securities included therein.  Notwithstanding the foregoing, but
subject to Section 5 hereof, if the managing underwriter or underwriters
participating in such offering advises each of the Holders in writing (with a
copy to the Company) that the total amount of securities requested to be
included in such Piggyback Registration exceeds the amount which can be sold in
(or during the time of) such offering without delaying or jeopardizing the
success of the offering (including the price per share of the securities to be
sold), then, after including all shares proposed to be sold by the Company in a
Company-initiated registration, the amount of securities to be offered for the
account of the Holders shall be reduced pro rata with all other holders
participating in such offering on the basis of the number of shares to be
registered by all stockholders participating in such offering; provided,
however that, subject to Section 5 hereof, the managing underwriter or
underwriters may not limit the Registrable Securities or other securities to be
included in such Registration to less than 25% of the securities included
therein.  Notwithstanding the foregoing, the Company shall have the right to
withdraw or delay the Registration Statement at any time; provided, however,
that written notice of such withdrawal or delay shall be given to the Holders
thereunder.





                                       6
<PAGE>   10
                 (c)      No Effect on Demand Registrations.  No Registration
of Registrable Securities effected pursuant to a request under this Section 4
shall be deemed to have been effected pursuant to Section 3 hereof or shall
relieve the Company of its obligation to effect any Registration upon request
under Section 3 hereof.

                 SECTION 5.       Priority of Other Registration Rights.

                 The parties expressly agree and understand that a Holder's
right to priority in a Registration of Registrable Securities shall at all
times be subordinate to the rights granted under (i) the Series A Preferred
Stock Purchase Agreement, dated as of September 30, 1993, as amended (the
"Preferred Stock Purchase Agreement"), (ii) the Underwriter's Warrant, dated as
of June 24, 1994 (the "Underwriter's Warrant"), and (iii) the Exchange and
Registration Rights Agreement, dated as of February 17, 1995 (the "Exchange and
Registration Rights Agreement" and collectively, with the Preferred Stock
Purchase Agreement and the Underwriter's Warrant, the "Priority Agreements") so
that inclusion of any Registrable Securities in any Registration requested to
be made pursuant to Sections 3(a) and 4(a) is subject to the prior right to
include in such Registration any securities requested to be registered by a
securityholder under the Priority Agreements as provided for therein.
Notwithstanding the foregoing, except in the case of a limitation imposed under
Sections 3(f) and 4(b), and subject to the conditions of this Section 5, the
Company shall use its best efforts to cause all Registrable Securities to be
registered that are requested to be registered, regardless of the number of
securities to be registered under the Priority Agreements.  As a result of the
foregoing, if any Registrable Security is excluded from a Demand Registration
due to the existing rights of such other securityholders, such Registration
shall not count as a Demand Registration.

                 SECTION 6.  Hold-Back Agreements.

                 (a)      Restrictions Applicable to Holders of Registrable
Securities.  If (i) the Company shall file a Registration Statement with
respect to its Common Stock or similar securities or securities convertible
into, or exchangeable or exercisable for, such securities in an Underwritten
Offering and (ii) the managing underwriter or underwriters advises the Company
in writing (in which case the Company shall notify the Holders) that a public
sale or distribution of Registrable Securities (other than those which may be
sold, after application of Section 4(b), by a Holder in connection with a
Piggyback Registration) would have material adverse effect on such offering,
then such Holder shall, to the extent not inconsistent with applicable law,
refrain from effecting any public sale or distribution of Registrable
Securities during the period following the effective date of such Registration
Statement and until the earliest of (A) the abandonment of such offering and
(B) 90 days, or such shorter date as the managing underwriter shall require,
after the effective date of such Registration Statement.

                 (b)      Registration Restrictions Applicable to the Company.
In the event of a Demand Registration, the Company, if requested by the Holders
of at least 50% of the Registrable Securities to be included in such Demand
Registration, (i) shall agree not to, and shall cause its executive officers
and directors not to, effect any public sale or distribution of its Common
Stock or similar securities or securities convertible into, or exchangeable or
exercisable for, such securities during the 90-day period following the
effective date of a Registration





                                       7
<PAGE>   11
Statement relating to an Underwritten Offering of Registrable Securities if the
managing underwriter or underwriters determine such public sale or distribution
would have a material adverse effect on such offering and (ii) shall (x) cause
each securityholder of the Company's privately placed equity securities issued
in connection with a financing transaction involving at least 5% of the
Company's then outstanding equity securities at any time after the date hereof
(provided that the foregoing shall not apply with respect to securities issued
in connection with corporate partnering transactions or off-balance sheet
financing transactions to fund early stage research, and (y) use its reasonable
best efforts to cause each other securityholder of the Company owning at least
10% of the Company's then outstanding equity securities (other than a
securityholder permitted to file a Schedule 13G under the Exchange Act) to
agree, not to effect a public sale or distribution of the Common Stock during
the 90-day period following the effective date of a Registration Statement
relating to an underwritten public offering of the Common Stock if the managing
underwriter or underwriters determine such public sale or distribution would
have a material adverse effect on such offering.

                 SECTION 7.  Registration Procedures.

                 In connection with the Company's Registration obligations
pursuant to Sections 3 and 4 hereof, the Company will use its best efforts to
effect such Registration to permit the sale of such Registrable Securities in
accordance with the intended method or methods of disposition thereof, and
pursuant thereto the Company will as expeditiously as possible:

                 (a)      before filing a Registration Statement thereto,
         furnish to the Holders of the Registrable Securities covered by such
         Registration Statement and the underwriters, if any, copies of such
         Registration Statement proposed to be filed, and any participating
         Holder or the underwriters, may suggest such changes thereto and the
         Company will consider including such changes, subject at all times to
         the Company's ultimate discretion to include or not include such
         changes;

                 (b)      prepare and file with the SEC a Registration
         Statement or Registration Statements relating to the applicable Demand
         Registration or Piggyback Registration including all exhibits and
         financial statements required by the SEC to be filed therewith, and
         use its best efforts to cause such Registration Statement to become
         effective under the Securities Act; and prepare and file with the SEC
         such amendments and post-effective amendments to such Registration
         Statement, and such supplements to the Prospectus, as may be requested
         by any underwriter of Registrable Securities or as may be required by
         the rules, regulations or instructions applicable to the Registration
         form utilized by the Company or by the Securities Act or rules and
         regulations otherwise necessary to keep the Registration Statement
         effective for a period of not less than nine months (or such shorter
         period which will terminate when all Registrable Securities covered by
         such Registration Statement have been sold or withdrawn); and cause
         the Prospectus as so supplemented to be filed pursuant to Rule 424
         under the Securities Act; and comply with the provisions of the
         Securities Act and the Exchange Act with respect to the disposition of
         all securities covered by such Registration Statement during the
         applicable period in accordance with the intended methods of
         disposition by the selling Holders thereof set forth in such
         Registration Statement or supplement to the Prospectus;





                                       8
<PAGE>   12
                 (c)      notify the selling Holders of Registrable Securities
         and the managing underwriters, if any, promptly, and (if requested by
         any such Person) confirm such advice in writing,

                          (1)     when the Prospectus or any Prospectus
                 supplement or post-effective amendment has been filed, and,
                 with respect to the Registration Statement or any
                 post-effective amendment, when the same has become effective,

                          (2)     of the issuance by the Commission of any stop
                 order suspending the effectiveness of the Registration
                 Statement or the initiation of any proceedings for that
                 purpose,

                          (3)     if at any time the representations and
                 warranties of the Company contemplated by paragraph (n)(1)
                 below cease to be true and correct,

                          (4)     of the receipt by the Company of any
                 notification with respect to the suspension of the
                 qualification of the Registrable Securities for sale in any
                 jurisdiction or the initiation or threatening of any
                 proceeding for such purpose, and

                          (5)     of the existence of any fact which results in
                 the Registration Statement, the Prospectus or any document
                 incorporated therein by reference containing an untrue
                 statement of material fact or omitting to state a material
                 fact required to be stated therein or necessary to make the
                 statements therein not misleading;

                 (d)      make every reasonable effort to obtain the withdrawal
         of any order suspending the effectiveness of the Registration
         Statement at the earliest possible moment;

                 (e)      if requested by the managing underwriter or
         underwriters or a Holder of Registrable Securities being sold in
         connection with an Underwritten Offering pursuant to Section 3 hereof,
         incorporate in a Prospectus supplement or post-effective amendment
         such information as the managing underwriters and the Holders of at
         least 50% of the Registrable Securities being sold agree should be
         included therein relating to the plan of distribution with respect to
         such Registrable Securities, including, without limitation,
         information with respect to the amount of Registrable Securities being
         sold to such underwriters, the purchase price being paid therefor by
         such underwriters and with respect to any other terms of the
         underwritten (or best efforts underwritten) offering of the
         Registrable Securities to be sold in such offering; and make all
         required filings of such Prospectus supplement or post-effective
         amendment as soon as notified of the matters to be incorporated in
         such Prospectus supplement or post-effective amendment;

                 (f)      furnish to each selling Holder of Registrable
         Securities and each managing underwriter, without charge, at least one
         copy of the Registration Statement and any post-effective amendment
         thereto, including financial statements and schedules, all documents





                                       9
<PAGE>   13
         incorporated therein by reference and all exhibits (including those
         incorporated by reference);

                 (g)      deliver to each selling Holder of Registrable
         Securities and the underwriters, if any, without charge, as many
         copies of the Prospectus (including each preliminary prospectus) and
         any amendment or supplement thereto as such Persons may reasonably
         request; the Company consents to the use of the Prospectus or any
         amendment or supplement thereto by each of the selling Holders of
         Registrable Securities and the underwriters, if any, in connection
         with the offering and sale of the Registrable Securities covered by
         the Prospectus or any amendment or supplement thereto;

                 (h)      prior to any public offering of Registrable
         Securities, register or qualify or cooperate with the selling Holders
         of Registrable Securities, the underwriters, if any, and their
         respective counsel in connection with the Registration or
         qualification of such Registrable Securities for offer and sale under
         the securities or blue sky laws of such jurisdictions as any selling
         Holder of Registrable Securities or any underwriter reasonably
         requests in writing and do any and all other acts or things reasonably
         necessary to enable the disposition in such jurisdictions of the
         Registrable Securities covered by the Registration Statement; provided
         that the Company will not be required to qualify generally to do
         business in any jurisdiction where it is not then so qualified or to
         take any action which would subject it to taxation or general service
         of process in any such jurisdiction where it is not then so subject;

                 (i)      cooperate with the selling Holders of Registrable
         Securities and the managing underwriters, if any, to facilitate the
         timely preparation and delivery of certificates representing
         Registrable Securities to be sold and not bearing any restrictive
         legends; and enable such Registrable Securities to be in such
         denominations and registered in such names as the managing
         underwriters may request at least two business days prior to any sale
         of Registrable Securities to the underwriters;

                 (j)      use its best efforts to cause the Registrable
         Securities covered by the applicable Registration Statement to be
         registered with or approved by such other foreign governmental
         agencies or authorities, and the NASD, as may be necessary to enable
         the seller or selling Holders thereof or the underwriters, if any, to
         consummate the disposition of such Registrable Securities; provided,
         however, that the Holders shall pay any and all costs associated with
         any such registration or approval with any foreign governmental agency
         or authority;

                 (k)      if any fact contemplated by paragraph (c)(6) above
         shall exist, prepare a supplement or post-effective amendment to the
         Registration Statement or the related Prospectus or any document
         incorporated therein by reference or file any other required document
         so that, as thereafter delivered to the purchasers of the Registrable
         Securities, the Prospectus will not contain an untrue statement of a
         material fact or omit to state any material fact required to be stated
         therein or necessary to make the statements therein not misleading;





                                      10
<PAGE>   14
                 (l)      cause all Registrable Securities covered by
         the Registration Statement to be listed on each securities exchange on 
         which similar securities issued by the Company are then listed if
         requested by the Holders of at least 50% of such Registrable Securities
         or the managing underwriters, if any; 

                 (m)      not later than the effective date of the applicable
         Registration Statement, provide a CUSIP number for all Registrable
         Securities and provide the applicable transfer agent with printed
         certificates for the Registrable Securities which are in a form
         eligible for deposit with Depositary Trust Company;

                 (n)      enter into agreements (including underwriting
         agreements in customary form for such underwriter and consistent with
         then current market practice) and take all other appropriate and
         reasonable actions in order to expedite or facilitate the disposition
         of such Registrable Securities and in such connection, whether or not
         an underwriting agreement is entered into and whether or not the
         Registration is an Underwritten Registration:

                          (1)     make such representations and warranties to
                 the Holders of such Registrable Securities and the
                 underwriters, if any, in form, substance and scope as are
                 customarily made by issuers to underwriters in Underwritten
                 Offerings in customary form and consistent with then current
                 market practice;

                          (2)     obtain opinions of counsel to the Company
                 (which counsel and opinions (in form, scope and substance)
                 shall be reasonably satisfactory to the managing underwriters,
                 if any, addressed to the underwriters, if any, in customary
                 form covering the matters customarily covered in opinions
                 requested in primary Underwritten Offerings and such other
                 matters as may be reasonably requested by such underwriters;

                          (3)     obtain "cold comfort" letters and updates
                 thereof from the Company's independent certified public
                 accountants addressed to the underwriters, if any, such
                 letters to be in customary form and consistent with then
                 current market practice and covering matters of the type
                 customarily covered in "cold comfort" letters by underwriters
                 in connection with primary Underwritten Offerings;

                          (4)     if an underwriting agreement is entered into,
                 cause the same to set forth in full the indemnification
                 provisions and procedures substantially to the effect set
                 forth in Section 9 hereof with respect to all parties to be
                 indemnified pursuant to said Section; and

                          (5)     deliver such documents and certificates as
                 may be reasonably requested in writing by the Holders of at
                 least 50% of the Registrable Securities being sold or the
                 managing underwriters, if any, to evidence compliance with
                 paragraph (k) above and with any customary conditions
                 contained in the underwriting agreement or other agreement
                 entered into by the Company.





                                      11
<PAGE>   15
         The above shall be done at each closing under such underwriting or
         similar agreement or as and to the extent required thereunder;

                 (o)      make available for inspection by any underwriter
         (including any "qualified independent underwriter" that is required to
         be retained in accordance with the rules and regulations of the NASD)
         participating in any disposition pursuant to such Registration
         Statement, and any attorney or accountant retained by underwriter, all
         financial and other records, pertinent corporate documents and
         properties of the Company, and cause the Company's officers, directors
         and employees to supply all information reasonably requested by any
         such representative, underwriter, attorney or accountant in connection
         with the Registration; provided that any records, documents,
         properties or information that are designated by the Company in
         writing as confidential shall be kept confidential by such Person and
         shall not be used for any purpose other than in connection with such
         Registration Statement unless disclosure of such records, documents,
         properties and information is required by court or administrative
         order;

                 (p)      otherwise use its best efforts to comply with all
         applicable rules and regulations of the SEC, and make generally
         available to its security holders, earnings statements satisfying the
         provisions of Section 11(a) of the Securities Act and Rule 158
         promulgated thereunder; and

                 (q)      cooperate and assist in any filings required to be
         made with the NASD and, subject to Section 7(o), in the performance of
         any due diligence investigation by any underwriter (including any
         "qualified independent underwriter" that is required to be retained in
         accordance with the rules and regulations of the NASD).

                 The Company may require each Holder of Registrable Securities
as to which any Registration is being effected to furnish to the Company such
information regarding such Holder and such Holder's intended method of
distribution of such Registrable Securities, as the Company may from time to
time reasonably request in writing.

                 Each Holder of Registrable Securities agrees by acquisition of
such Registrable Securities that, upon receipt of any notice from the Company
of the happening of any event of the kind described in Section 7(c)(6) hereof,
such Holder will forthwith discontinue disposition of Registrable Securities
until such Holder's receipt of the copies of the supplemented or amended
Prospectus contemplated by Section 7(k) hereof, or until it is advised in
writing by the Company that the use of the Prospectus may be resumed, and has
received copies of any additional or supplemental filings which are
incorporated by reference in the Prospectus, and, if so directed by the
Company, such Holder will deliver to the Company (at the Company's expense) all
copies, other than permanent file copies then in such Holder's possession, of
the Prospectus covering such Registrable Securities current at the time of
receipt of such notice.  In the event the Company shall give any such notice,
the time periods during which such Registration Statement shall be maintained
effective shall be extended by the number of days during the period from and
including the date of the giving of such notice to and including the date when
each seller of Registrable Securities covered by such Registration Statement
either





                                      12
<PAGE>   16
receives the copies of the supplemented or amended prospectus contemplated by
Section 7(k) hereof or is advised in writing by the Company that the use of the
Prospectus may be resumed.

                 SECTION 8.  Registration Expenses.

                 (a)      All expenses incident to the Company's performance of
or compliance with this Agreement will be paid by the Company, regardless of
whether the Registration Statement becomes effective, including without
limitation:

                          (1)     all Registration and filing fees (including
         with respect to filings required to be made with the SEC);

                          (2)     fees and expenses of compliance with
         securities or blue sky laws (including fees and disbursements of
         counsel for the underwriters or selling Holders in connection with
         blue sky qualifications of the Registrable Securities and
         determination of their eligibility for investment under the laws of
         such jurisdictions as the managing underwriters or Holders of at least
         50% of the Registrable Securities being sold may designate);

                          (3)     printing (including expenses of printing
         certificates for the Registrable Securities in a form eligible for
         deposit with the Depositary Trust Company and of printing
         prospectuses), messenger, telephone and delivery expenses;

                          (4)     fees and disbursements of counsel for the
         Company; 

                          (5)     fees and disbursements of all independent
         certified public accountants of the Company (including the expenses of
         any "cold comfort" letters required by or incident to such
         performance);

                          (6)     fees and expenses of other Persons retained by
         the Company; and 

                          (7)     all Registration, filing and other fees and
         expenses associated with any NASD filing required to be made in
         connection with the Registration Statement (all such expenses being
         herein called "Registration Expenses").

                 The Company will, in any event, pay its internal expenses
(including, without limitation, all salaries and expenses of its officers and
employees performing legal or accounting duties), the expense of any annual
audit, the fees and expenses incurred in connection with the listing of the
securities to be registered on each securities exchange on which similar
securities issued by the Company are then listed, rating agency fees and the
fees and expenses of any Person, including special experts, retained by the
Company.  Notwithstanding any provision to the contrary, if a registration
initiated under Section 3 is withdrawn by the Holders initiating such
registration under circumstances that would nevertheless be considered a Demand
Registration under Section 3(b), the Company shall have no obligation to pay
expenses of such registration and all such expenses shall be paid by the
Holders initiating such registration.





                                      13
<PAGE>   17
                 (b)      Each selling Holder of the Registrable Securities 
         shall pay all discounts, commissions, fees and expenses of the 
         underwriters, selling brokers, dealer managers and similar industry 
         professionals, transfer taxes and any out-of-pocket costs and
         expenses of such selling Holder including the fees and expenses of
         counsel for such selling Holder relating to the distribution of such
         Registrable Securities.

                 SECTION 9.  Indemnification.

                 (a)      Indemnification by Company.  The Company agrees to
indemnify and hold harmless each Holder of Registrable Securities, its
officers, directors, employees and Agents and each Person who controls such
Holder within the meaning of either Section 15 of the Securities Act or Section
20 of the Exchange Act (each such person being sometimes hereinafter referred
to as an "Indemnified Holder") from and against all losses, claims, damages,
liabilities and expenses (including reasonable costs of investigation and legal
expenses) arising out of or based upon any untrue statement or alleged untrue
statement of a material fact contained in any Registration Statement or
Prospectus or in any amendment or supplement thereto or in any preliminary
prospectus, or arising out of or based upon any omission or alleged omission to
state therein a material fact required to be stated therein or necessary to
make the statements therein not misleading, except insofar as such losses,
claims, damages, liabilities or expenses arise out of or are based upon any
such untrue statement or omission or allegation thereof based upon information
furnished in writing to the Company by such Holder or any underwriter expressly
for use therein; provided, however, that the Company shall not be liable in any
such case to the extent that any such loss, claim, damage, liability or expense
arises out of or is based upon an untrue statement or alleged untrue statement
or omission or alleged omission in any Prospectus or preliminary prospectus, if
such untrue statement or alleged untrue statement, omission or alleged omission
is completely corrected in an amendment or supplement to the Prospectus or
preliminary prospectus and if, having previously been furnished by or on behalf
of the Company with copies of the Prospectus or preliminary prospectus as so
amended or supplemented, such Holder thereafter fails to deliver such
Prospectus or preliminary prospectus as so amended or supplemented, prior to or
concurrently with the sale of a Registrable Security to the person asserting
such loss, claim, damage, liability or expense who purchased such Registrable
Security which is the subject thereof from such Holder.  This indemnity will be
in addition to any liability which the Company may otherwise have.

                 If any action or proceeding (including any governmental
investigation or inquiry) shall be brought or asserted against an Indemnified
Holder in respect of which indemnity may be sought from the Company, such
Indemnified Holder shall promptly notify the Company in writing, and the
Company shall assume the defense thereof, including the employment of counsel
satisfactory to such Indemnified Holder and the payment of all expenses.  Such
Indemnified Holder shall have the right to employ separate counsel in any such
action and to participate in the defense thereof, but the fees and expenses of
such counsel shall be at the expense of such Indemnified Holder unless (a) the
Company has agreed to pay such fees and expenses or (b) the Company shall have
failed to assume the defense of such action or proceeding and has failed to
employ counsel satisfactory to such Indemnified Holder in any such action or
proceeding or (c) the named parties to any such action or proceeding (including
any impleaded parties) include both such Indemnified Holder and the Company,
and such Indemnified Holder shall have been





                                      14
<PAGE>   18
advised by counsel that there may be one or more legal defenses available to
such Indemnified Holder which are different from or additional to those
available to the Company (in which case, if such Indemnified Holder notifies
the Company in writing that it elects to employ separate counsel at the expense
of the Company, the Company shall not have the right to assume the defense of
such action or proceeding on behalf of such Indemnified Holder, it being
understood, however, that the Company shall not, in connection with any one
such action or proceeding or separate but substantially similar or related
actions or proceedings in the same jurisdiction arising out of the same general
allegations or circumstances, be liable for the reasonable fees and expenses of
more than one separate firm of attorneys at any time for such Indemnified
Holder and any other Indemnified Holders, which firm shall be designated in
writing by such Indemnified Holders).  The Company shall not be liable for any
settlement of any such action or proceeding effected without its written
consent, but if settled with its written consent, or if there be a final
judgment for the plaintiff in any such action or proceeding, the Company agrees
to indemnify and hold harmless such Indemnified Holders from and against any
loss or liability by reason of such settlement or judgment.

                 (b)      Indemnification by Holder of Registrable Securities.
Each Holder of Registrable Securities agrees to indemnify and hold harmless the
Company, its directors and officers and each Person, if any, who controls the
Company within the meaning of either Section 15 of the Securities Act or
Section 20 of the Exchange Act to the same extent as the foregoing indemnity
from the Company to such Holder, but only with respect to (i) information
relating to such Holder furnished in writing by such Holder expressly for use
in, and information provided under Section 3(a) hereof for use in, any
Registration Statement or Prospectus, or any amendment or supplement thereto,
or any preliminary prospectus and (ii) any loss, claim, damage, liability or
expense described in the proviso to the first sentence of Section 9(a).  In
case any action or proceeding shall be brought against the Company or its
directors or officers or any such controlling person, in respect of which
indemnity may be sought against a Holder of Registrable Securities, such Holder
shall have the rights and duties given the Company and the Company or its
directors or officers or such controlling person shall have the rights and
duties given to each Holder by the preceding paragraph.  In no event shall the
liability of any selling Holder of Registrable Securities hereunder be greater
in amount than the dollar amount of the proceeds received by such Holder upon
the sale of the Registrable Securities giving rise to such indemnification
obligation.

                 The Company shall be entitled to receive indemnities from
underwriters, selling brokers, dealer managers and similar securities industry
professionals participating in the distribution, to the same extent as provided
above with respect to information so furnished in writing by such Persons
specifically for inclusion in any Prospectus or Registration Statement or any
amendment or supplement thereto, or any preliminary prospectus.

                 (c)      Contribution.  If the indemnification provided for in
this Section 9 is unavailable to an indemnified party under Section 9(a) or
Section 9(b) hereof (other than by reason of exceptions provided in those
Sections) in respect of any losses, claims, damages, liabilities or expenses
referred to therein, then each applicable indemnifying party, in lieu of
indemnifying such indemnified party, shall contribute to the amount paid or
payable by such indemnified party as a result of such losses, claims, damages,
liabilities or expenses in such





                                      15
<PAGE>   19
proportion as is appropriate to reflect the relative fault of the Company on
the one hand and of the Indemnified Holder on the other in connection with the
statements or omissions which resulted in such losses, claims, damages,
liabilities or expenses, as well as any other relevant equitable
considerations.  The relative fault of the Company on the one hand and of the
Indemnified Holder on the other shall be determined by reference to, among
other things, whether the untrue or alleged untrue statement of a material fact
or the omission or alleged omission to state a material fact relates to
information supplied by the Company or by the Indemnified Holder and the
parties' relative intent, knowledge, access to information and opportunity to
correct or prevent such statement or omission.  The amount paid or payable by a
party as a result of the losses, claims, damages, liabilities and expenses
referred to in Section 9(a) or Section 9(b) shall be deemed to include, subject
to the limitations set forth in the second paragraph of Section 9(a), any legal
or other fees or expenses reasonably incurred by such party in connection with
investigating or defending any action or claim.

                 The Company and each Holder of Registrable Securities agree
that it would not be just and equitable if contribution pursuant to this
Section 9(c) were determined by pro rata allocation or by any other method of
allocation which does not take account of the equitable considerations referred
to in the immediately preceding paragraph. Notwithstanding the provisions of
this Section 9(c), an Indemnified Holder shall not be required to contribute
any amount in excess of the amount by which the total price at which the
Registrable Securities sold by such Indemnified Holder or its affiliated
Indemnified Holders and distributed to the public were offered to the public
exceeds the amount of any damages which such Indemnified Holder, or its
affiliated Indemnified Holder, has otherwise been required to pay by reason of
such untrue or alleged untrue statement or omission or alleged omission.  No
person guilty of fraudulent misrepresentation (within the meaning of Section
11(f) of the Securities Act) shall be entitled to contribution from any person
who was not guilty of such fraudulent misrepresentation.

                 SECTION 10.  Transfer of Registration Rights.

                 The rights to cause the Company to register securities granted
by the Company hereunder may be transferred or assigned by Purchaser or a
subsequent Holder in writing to a transferee or assignee; provided, however,
that such transfer is in connection with the sale of Registerable Securities
covering a minimum of the greater of 25% of the Registrable Securities then
outstanding or 200,000 shares of Common Stock.  Such Holder within a reasonable
time after said transfer shall give written notice to the Company, stating the
name and address of said transferee or assignee and identifying the securities
with respect to which such registration rights are being assigned.  Subsequent
transfers or assignments of such registration rights may also be effected in
accordance with the foregoing requirements.

                 SECTION 11.  Rule 144.

                 The Company covenants that it will file the reports required
to be filed by it under the Exchange Act and the rules and regulations adopted
by the SEC thereunder, all to the extent required from time to time to enable
such Holder to sell Registrable Securities without Registration under the
Securities Act within the limitation of the exemptions provided by (a) Rule 144
under the Securities Act, as such Rule may be amended from time to time, or (b)
any





                                      16
<PAGE>   20
similar rule or regulation hereafter adopted by the SEC.  Upon the request of
any Holder of Registrable Securities, the Company will deliver to such Holder a
written statement as to whether it has complied with such information and
requirements.

                 SECTION 12.  Participation in Underwritten Registrations.

                 Subject to Section 5 hereof, no Person may participate in any
Underwritten Registration hereunder unless such Person (a) agrees to sell such
Person's securities on the basis provided in any underwriting arrangements
approved by the Persons entitled hereunder to approve such arrangements and (b)
completes and executes all questionnaires, powers of attorney, indemnities,
underwriting agreements and other documents required under the terms of such
underwriting arrangements.

                 SECTION 13.  Miscellaneous.

                 (a)      Remedies.  Each of the parties hereto, in addition to
being entitled to exercise all rights provided herein, in the Purchase
Agreement and granted by law, including recovery of damages, will be entitled
to specific performance of its rights under this Agreement.  Each of the
parties hereto agrees that monetary damages would not be adequate compensation
for any loss incurred by reason of a breach by it of the provisions of this
Agreement and hereby agrees to waive the defense in any action for specific
performance that a remedy at law would be adequate.

                 (b)      No Inconsistent Agreements.  From and after the date
hereof, except with respect to registration rights granted by the Company
pursuant to the Priority Agreements, the Company shall not enter into any
agreement granting any holder or prospective holder of any securities of the
Company registration rights with respect to such securities unless such new
registration rights are pari passu with, subordinate to, or otherwise do not
materially adversely affect the rights of Holders granted hereunder.  The
Company represents and warrants that the rights granted to the Holders of
Registrable Securities hereunder do not in any way conflict with and are not
inconsistent with the rights granted to the holders of the Company's securities
under any agreement in effect on the date hereof.

                 (c)      Amendments and Waivers.  The provisions of this
Agreement, including the provisions of this sentence, may not be amended,
modified or supplemented, and waivers or consents to departures from the
provisions hereof may not be given unless the Company has obtained the written
consent of Holders of at least 50% of the then outstanding Registrable
Securities.  Notwithstanding the foregoing, a waiver or consent to departure
from the provisions hereof that relates exclusively to the rights of Holders of
Registrable Securities whose securities are being sold pursuant to a
Registration Statement and that does not directly or indirectly affect the
rights of other Holders of Registrable Securities may be given by the Holders
of a majority of the Registrable Securities being sold.

                 (d)      Notices.  Unless otherwise provided herein, any
notice, request, instruction or other document to be given hereunder by any
party to the others shall be in writing and delivered in person or by courier
or by facsimile transmission (with receipt confirmed), or





                                      17
<PAGE>   21
mailed by certified mail, postage prepaid, return receipt requested (such
mailed notice to be effective on the date of such receipt is acknowledged), as
follows:

         If to the Holder of Registrable Securities, at the most current
address given by such Holder to the Company in accordance with the provisions
of this Section 12(d), which address initially is, with respect to the
Purchaser:

                          Amgen Inc.
                          Amgen Center
                          1840 DeHavilland Drive
                          Thousand Oaks, California 91320-1789
                          Attn: Corporate Secretary
                          Telecopy No.: (805) 499-8011

         With a copy to:

                          Latham & Watkins
                          633 West Fifth Street
                          Los Angeles, California 90071
                          Attn: Gary Olson, Esq.
                          Telecopy No.: (213) 891-8763

         (ii) if to the Company, initially to:

                          Guilford Pharmaceuticals Inc.
                          6611 Tributary Street
                          Baltimore, Maryland  21224
                          Attn: Corporate Secretary
                          Telecopy No.: (410) 631-6899

         With a copy to:

                          Hogan & Hartson, L.L.P.
                          111 South Calvert Street, 16th Floor
                          Baltimore, Maryland  21202
                          Attn:  Michael Silver, Esq.
                          Telecopy No.: (410) 539-6981


or to such other place and with such other copies as either party may designate
as to itself by written notice to the others.

                 (e)      Successors and Assigns.  Except as otherwise
expressly provided herein, this Agreement shall inure to the benefit of and be
binding upon the successors and assigns of each of the parties, including
without limitation, subsequent Holders of Registrable Securities; provided,
however, that this Agreement shall not inure to the benefit of or be binding
upon a





                                      18
<PAGE>   22
successor or assign of a Holder of Registrable Securities unless and to the
extent such successor or assign acquired Registrable Securities from such
Holder.

                 (f)      Counterparts.  This Agreement may be executed in any
number of counterparts and by the parties hereto in separate counterparts, each
of which when so executed shall be deemed to be an original and all of which
taken together shall constitute one and the same agreement.

                 (g)      Headings.  The headings in this Agreement are for
convenience of reference only and shall not limit or otherwise affect the
meaning hereof.

                 (h)      Governing Law.  This Agreement shall be governed by
and construed in accordance with the laws of the State of Delaware (without
regard to choice of law provisions).

                 (i)      Severability.  In the event that any one or more of
the provisions contained herein, or the application thereof in any
circumstance, is held invalid, illegal or unenforceable, the validity, legality
and enforceability of any such provision in every other respect and of the
remaining provisions contained herein shall not be affected or impaired
thereby.

                 (j)      Entire Agreement.  This Agreement together with the
Collateral Agreements are intended by the parties as a final expression of
their agreement and intended to be a complete and exclusive statement of the
agreement and understanding of the parties hereto in respect of the subject
matter contained herein.  There are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein with respect to
the registration rights granted by the Company with respect to the securities
sold pursuant to the Purchase Agreement. This Agreement supersedes all prior
agreements and understandings between the parties with respect to such subject
matter including without limitation Exhibit A to the Binding Term Sheet.



                           [Signature Page To Follow]





                                      19
<PAGE>   23
                 IN WITNESS WHEREOF, the parties have executed this Agreement
as of the date first written above.

                     GUILFORD PHARMACEUTICALS INC.
                     
                     
                     
                     By: /S/ CRAIG R. SMITH, M.D.                              
                        -------------------------------------------------------
                        Name:   Craig R. Smith, M.D.
                        Title:  President and Chief Executive Officer
                     
                     
                     
                     AMGEN INC.
                     
                     
                     
                     By: /S/ GEORGE A. VANDEMAN                                
                        -------------------------------------------------------
                        Name:   George A. Vandeman
                        Title:  Senior Vice President, General Counsel 
                                and Secretary





                                      S-1


<PAGE>   1
                                                                   EXHIBIT 10.52


================================================================================



                                    WARRANT





                          Dated as of October 1, 1997



================================================================================
<PAGE>   2
                               TABLE OF CONTENTS


<TABLE>
<CAPTION>
                                                                                                                      PAGE
                                                                                                                      ----
<S>                                                                                                                     <C>
SECTION 1.  Term; Exercise of Warrant   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    1
                                                                                                                      
SECTION 2.  Payment of Taxes  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    2
                                                                                                                      
SECTION 3.  Exercise Price  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    2
                                                                                                                      
SECTION 4.  Mutilated or Missing Warrant Certificates   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    2
                                                                                                                      
SECTION 5.  Reservation of Warrant Shares   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    2
                                                                                                                      
SECTION 6.  Obtaining Stock Exchange Listings   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    3
                                                                                                                      
SECTION 7.  Adjustment of Exercise Price and Number of Warrant Shares Issuable  . . . . . . . . . . . . . . . . . . .    3
         (a)     Adjustment for Change in Capital Stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    3
         (b)     Adjustment for Rights Issue  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    4
         (c)     Adjustment for Other Distributions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    5
         (d)     Fair Market Value  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    6
         (e)     When De Minimis Adjustment May Be Deferred . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    7
         (f)     When No Adjustment Required  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    7
         (g)     Reorganization of Company  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    7
         (h)     Adjustment in Number of Shares of Common Stock . . . . . . . . . . . . . . . . . . . . . . . . . . .    8
         (i)     Disputes; Fair Market Value Determination  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    9
         (j)     Form of Warrant  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    9
                                                                                                                      
SECTION 8.  Fractional Interests  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    9
                                                                                                                      
SECTION 9.  Notices to the Holder   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   10
                                                                                                                      
SECTION 10.  Notices to Company and the Holder  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   11
                                                                                                                      
SECTION 11.  Supplements and Amendments   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   12
                                                                                                                      
SECTION 12.  Successors and Assignment  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   12
                                                                                                                      
SECTION 13.  Governing Law  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   12
                                                                                                                      
SECTION 14.  Benefits of This Warrant   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   12
                                                                                                                      
SECTION 15.  Counterparts   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   12
</TABLE>





                                       i
<PAGE>   3

THIS WARRANT AND THE SHARES OBTAINABLE UPON EXERCISE HEREOF HAVE NOT BEEN
REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY NOT BE
OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR HYPOTHECATED UNLESS AND
UNTIL SUCH WARRANT OR SHARES ARE REGISTERED UNDER SUCH ACT OR AN OPINION OF
COUNSEL REASONABLY SATISFACTORY TO THE COMPANY IS OBTAINED TO THE EFFECT THAT
SUCH REGISTRATION IS NOT REQUIRED.

                         GUILFORD PHARMACEUTICALS INC.

                                    WARRANT

                 This certifies that, for the sum of $5 million, the receipt of
which is hereby acknowledged, Amgen Inc., or its registered permitted assigns
(the "Holder") is entitled to subscribe for and purchase up to 700,000 shares
(subject to adjustment as described herein) of fully paid and nonassessable
Common Stock of Guilford Pharmaceuticals Inc., a Delaware corporation (the
"Company"), upon exercise of this Warrant and subject to the provisions and
upon the terms and conditions hereinafter set forth.

                 SECTION 1.  Term; Exercise of Warrant.  Subject to the terms
of this Warrant, the Holder shall have the right, which may be exercised
commencing at the opening of business on October 2, 1997 and until 5:00 p.m.,
Maryland time on October 1, 2002, to receive from the Company the number of
fully paid and nonassessable Warrant Shares which the Holder may at the time be
entitled to receive on exercise of such Warrant and payment to the Company of
the Exercise Price (as defined below) then in effect for such Warrant Shares;
provided, however, that such Warrant shall be exercised in minimum increments
of 100,000 shares or as proportionately adjusted for any stock splits or stock
dividends or the like.  If not exercised prior to 5:00 p.m., Maryland time on
October 1, 2002, this Warrant shall become void and all rights thereunder and
all rights in respect thereof shall cease as of such time.

                 This Warrant may be exercised upon surrender to the Company at
its office designated for such purpose (the address of which is set forth in
Section 10 hereof) this Warrant with the form of election to purchase duly
filled in and signed, which signature shall be guaranteed by a bank or trust
company having an office or correspondent in the United States or a broker or
dealer which is a member of a registered securities exchange or the National
Association of Securities Dealers, Inc., and upon payment to the Company of the
Exercise Price (as defined in Section 3), subject to adjustment pursuant to
Section 7, for the number of Warrant Shares in respect of which the Warrant is
then exercised.  Payment of the aggregate Exercise Price shall be made in cash
or by certified or official bank check payable to the order of the Company.

                 Subject to the provisions of Section 2 hereof, upon such
surrender of this Warrant and payment of the Exercise Price the Company shall
issue and cause to be delivered with all reasonable dispatch to or upon the
written order of the Holder and in such name or names as the Holder may
designate, a certificate or certificates for the number of full Warrant Shares
issuable upon the exercise of such Warrant together with cash as provided in
Section 8;





                                       1
<PAGE>   4
provided, however, that if any reclassification, consolidation, merger or lease
or sale of assets is proposed to be effected by the Company as described in
subsection (j) of Section 7 hereof, or a tender offer or an exchange offer for
shares of Common Stock of the Company shall be made, upon such surrender of
Warrant and payment of the Exercise Price as aforesaid, the Company shall, as
soon as possible, but in any event not later than two business days thereafter,
issue and cause to be delivered the full number of Warrant Shares issuable upon
the exercise of such Warrant in the manner described in this sentence together
with cash as provided in Section 8.  Such certificate or certificates shall be
deemed to have been issued and any person so designated to be named therein
shall be deemed to have become a holder of record of such Warrant Shares as of
the date of the surrender of such Warrant and payment of the Exercise Price.

                 The Warrant shall be exercisable, at the election of the
Holder, either in full or from time to time in part (in minimum increments of
100,000 shares) and, in the event that the Warrant is exercised in respect of
fewer than all of the Warrant Shares issuable on such exercise at any time
prior to the date of expiration of the Warrant, a new Warrant will be issued
and delivered pursuant to the provisions of this Section.

                 All Warrants surrendered upon exercise of Warrants shall be
cancelled and disposed of by the Company.  The Company shall keep copies of
this Warrant and any notices given or received hereunder available for
inspection by the Holder during normal business hours at its office.

                 SECTION 2.  Payment of Taxes.  The Company will pay all
documentary stamp taxes, if any, attributable to the initial issuance of
Warrant Shares upon the exercise of Warrants.

                 SECTION 3.  Exercise Price.  The purchase price for each share
of Common Stock deliverable upon exercise of this Warrant (the "Exercise
Price") is $35.15 per share, subject to adjustment as described in Section 7
herein.

                 SECTION 4.  Mutilated or Missing Warrant Certificates.  In
case the Warrant shall be mutilated, lost, stolen or destroyed, the Company
shall issue, in exchange and substitution for and upon cancellation of the
mutilated Warrant, or in lieu of and substitution for the Warrant lost, stolen
or destroyed, a new Warrant of like tenor and representing an equivalent number
of Warrant Shares, but only upon receipt of evidence reasonably satisfactory to
the Company of such loss, theft or destruction of such Warrant and indemnity,
if requested, also reasonably satisfactory to it.

                 SECTION 5.  Reservation of Warrant Shares.  The Company will
at all times reserve and keep available, free from preemptive rights, out of
the aggregate of its authorized but unissued Common Stock or its authorized and
issued Common Stock held in its treasury, for the purpose of enabling it to
satisfy any obligation to issue Warrant Shares upon exercise of the Warrant,
the maximum number of shares of Common Stock which may then be deliverable upon
the exercise of the outstanding Warrant.





                                       2
<PAGE>   5
                 The Company or, if appointed, the transfer agent for the
Common Stock (the "Transfer Agent") and every subsequent transfer agent for any
shares of the Company's capital stock issuable upon the exercise of any of the
rights of purchase aforesaid will be irrevocably authorized and directed at all
times to reserve such number of authorized shares as shall be required for such
purpose.  The Company will keep a copy of this Warrant on file with the
Transfer Agent and with every subsequent transfer agent for any shares of the
Company's capital stock issuable upon the exercise of the rights of purchase
represented by the Warrants.  The Company will furnish such Transfer Agent a
copy of all notices of adjustments and certificates related thereto,
transmitted to each Holder pursuant to Section 9 hereof.

                 Before taking any action which would cause an adjustment
pursuant to Section 7 hereof to reduce the Exercise Price below the then par
value (if any) of the Warrant Shares, the Company will take any corporate
action which may, in the opinion of its counsel, be necessary in order that the
Company may validly and legally issue fully paid and nonassessable Warrant
Shares at the Exercise Price as so adjusted.

                 The Company covenants that all Warrant Shares which may be
issued upon exercise of this Warrant will, upon issue, be fully paid,
nonassessable, free of preemptive rights and free from all documentary stamp
taxes, and liens, charges and security interests with respect to the issue
thereof.

                 SECTION 6.  Obtaining Stock Exchange Listings.  The Company
will from time to time take all action which may be necessary so that the
Warrant Shares, immediately upon their issuance upon the exercise of this
Warrant, will be listed on the principal securities exchanges and automated
quotation systems within the United States of America, if any, on which other
shares of Common Stock are then listed.

                 SECTION 7.  Adjustment of Exercise Price and Number of Warrant
Shares Issuable.  The Exercise Price and the number of Warrant Shares issuable
upon the exercise of the Warrant are subject to adjustment from time to time
upon the occurrence of the events enumerated in this Section 7.  For purposes
of this Section 7, "Common Stock" means shares now or hereafter authorized of
any class of common stock of the Company and any other stock of the Company,
however designated, that has the right (subject to any prior rights of any
class or series of preferred stock) to participate in any distribution of the
assets or earnings of the Company without limit as to per share amount.

         (a)     Adjustment for Change in Capital Stock.

                 If the Company:  (i) pays a dividend or makes a distribution
on its Common Stock in shares of its Common Stock; (ii) subdivides its
outstanding shares of Common Stock into a greater number of shares; or (iii)
combines its outstanding shares of Common Stock into a smaller number of
shares; then the Exercise Price in effect immediately prior to such action
shall then be adjusted in accordance with the formula:





                                       3
<PAGE>   6
                                      O
                            E'= E x ------
                                      A
Where:

         E' =    the adjusted Exercise Price

         E  =    the current Exercise Price

         O  =    the number of shares of Common Stock outstanding prior to such
                 action 

         A  =    the number of shares of Common Stock outstanding immediately
                 after such action


                 In the case of a dividend or distribution the adjustment shall
become effective immediately after the payment date for such dividend or
distribution, or the effective date of such other corporate action including,
but not limited to, a subdivision or combination.

                 If after an adjustment the Holder upon exercise of the Warrant
may receive shares of two or more classes of capital stock of the Company, the
Company shall determine the allocation of the adjusted Exercise Price between
the classes of capital stock.  After such allocation, the exercise privilege,
the number of shares issuable upon such exercise, and the Exercise Price of
each class of capital stock shall thereafter be subject to adjustment on terms
comparable to those applicable to Common Stock in this Section 7.

                 Such adjustment shall be made successively whenever any event
listed above shall occur.

         (b)     Adjustment for Rights Issue.

                 If the Company distributes any rights, options or warrants to
all holders of its Common Stock entitling them at any time after the record
date mentioned below to purchase shares of Common Stock at a price per share
less than the Fair Market Value (as defined in Section 7(d)) per share on such
record date relating to such distribution, the Exercise Price shall be adjusted
in accordance with the formula:





                                       4
<PAGE>   7
                                          N x P
                                     O + -------
                                            M
                            E' = E x -----------
                                          O + N
where:

     E' =        the adjusted Exercise Price.

     E  =        the current Exercise Price.

     O  =        the number of shares of Common Stock outstanding on the record 
                 date.

     N  =        the number of additional shares of Common Stock issuable upon
                 exercise of the rights, options or warrants offered.

     P  =        the exercise price per share of the additional shares issuable
                 upon exercise of the rights, options or warrants.

     M  =        the Fair Market Value per share of Common Stock on the record
                 date.

                 The adjustment shall be made successively whenever any such
rights, options or warrants are issued and shall become effective immediately
after the record date for the determination of stockholders entitled to receive
the rights, options or warrants.  If at the end of the period during which such
rights, options or warrants are exercisable, not all rights, options or
warrants shall have been exercised, the Exercise Price shall be immediately
readjusted to what it would have been if "N" in the above formula had been the
number of shares actually issued.

                 Notwithstanding the foregoing, if the Company distributes or
issues rights to all holders of its Common Stock pursuant to a shareholder
rights plan, then no adjustment shall be made pursuant to this Section 7(b)
upon such distribution or issuance if, upon exercise of the Warrant, the Holder
receives the same type and number of unexpired rights it would have received
(as adjusted for any event described in Sections 7(a) or (g) had it exercised
the Warrant, and been a holder of the shares of Common Stock issuable upon
exercise thereof, prior to the record date for such distribution or issuance.

         (c)     Adjustment for Other Distributions.

                 If the Company distributes to all holders of its Common Stock
any of its assets (including but not limited to securities and cash), debt
securities, capital stock, or any rights or warrants to purchase assets, debt
securities, capital stock, or other securities, the Exercise Price shall be
adjusted in accordance with the formula:





                                       5
<PAGE>   8
                                           M - F
                              E' = E x ------------
                                             M
where:

     E' =        the adjusted Exercise Price.

     E  =        the current Exercise Price.

     M  =        the Fair Market Value per share of Common Stock on the record
                 date mentioned below.

     F  =        the Fair Market Value on the record date of the assets, debt
                 securities, capital stock or rights or warrants applicable to
                 one share of Common Stock.

                 The adjustment shall be made successively whenever any such
distribution is made and shall become effective immediately after the record
date for the determination of stockholders entitled to receive the
distribution.

                 This subsection does not apply to (i) dividends,
distributions, combinations or issuances referred to in subsection (a) of this
Section 7, or (ii) rights, options or warrants referred to in subsection (b) of
this Section 7.

         (d)     Fair Market Value.

                 "Fair Market Value" per share of Common Stock or any other
security (herein collectively referred to as a "Security") or for any other
asset at any date shall be:

                 (1)      if the Security is registered under the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), the average of the daily
Market Prices for each business day during the period commencing 30 business
days before such date and ending on the date one day prior to such date or, if
the Security has been registered under the Exchange Act for less than 30
consecutive business days before such date, then the average of the daily
Market Prices for all of the business days before such date for which daily
Market Prices are available.  If the Market Price is not determinable for at
least 15 business days in such period, the Fair Market Value of the Security
shall be determined as if the Security was not registered under the Exchange
Act; or

                 (2)      if the asset or Security is not registered under the
Exchange Act, (i) the value of the asset or Security determined in good faith
by the Board of Directors of the Company and certified in a board resolution,
based on the most recently completed arm's length transaction between the
Company and a person other than an affiliate of the Company in which such
determination is necessary and the closing of which occurs on such date or
shall have occurred within the six months preceding such date, or (ii) if no
such transaction shall have





                                       6
<PAGE>   9
occurred on such date or within such six-month period, the value of the asset
or Security determined pursuant to the procedures set forth in Section 7(i).

                 The "Market Price" for any Security on any business day means:
(i) if such Security is listed or admitted to trading on any securities
exchange, the closing price, regular way, on such day on the principal exchange
on which such Security is traded, or if no sale takes place on such day, the
average of the closing bid and asked prices on such day, (ii) if such Security
is not then listed or admitted to trading on any securities exchange, the last
reported sale price on such day, or if there is no such last reported sale
price on such day, the average of the closing bid and the asked prices on such
day, as reported by a reputable quotation source designated by the Company, or
(iii) if neither clause (i) nor (ii) is applicable, the average of the reported
high bid and low asked prices on such day, as reported by a reputable quotation
service, or a newspaper of general circulation in the Borough of Manhattan,
City of New York, customarily published on each business day, designated by the
Company.  If there are no such prices on a business day, then the Market Price
shall not be determinable for such business day.

         (e)     When De Minimis Adjustment May Be Deferred.

                 No adjustment in the Exercise Price need be made unless the
adjustment would require an increase or decrease of at least 1% in the Exercise
Price.  Any adjustments that are not made shall be carried forward and taken
into account in any subsequent adjustment.

                 All calculations under this Section shall be made to the
nearest cent or to the nearest 1/20th of a share, as the case may be.

         (f)     When No Adjustment Required.

                 No adjustment shall be made for a transaction referred to in
subsections (a), (b) or (c) of this Section 7 if Holder is to participate in
the transaction on a basis and with notice that is fair and appropriate in
light of the basis and notice on which holders of Common Stock participate in
the transaction.

                 No adjustment shall be made for rights to purchase Common
Stock pursuant to a Company plan for reinvestment of dividends or interest.

                 No adjustment shall be made for a change in the par value of
the Common Stock.

                 To the extent this Warrant becomes convertible into cash, no
adjustment need be made thereafter as to the cash.  Interest will not accrue on
the cash.

         (g)     Reorganization of Company.

                 If any reclassification of the Common Stock of the Company or
any consolidation or merger of the Company with another entity, or the sale or
lease of all or substantially all of the Company's assets to another entity
shall be effected in such a way that holders of the Common Stock of the Company
shall be entitled to receive stock, securities or assets with





                                       7
<PAGE>   10
respect to or in exchange for such Common Stock, then, as a condition precedent
to such reclassification, consolidation, merger, sale or lease, lawful and
adequate provisions shall be made whereby the Holder shall thereafter have the
right to purchase and receive upon the basis and the terms and conditions
specified in this Warrant and in lieu of the shares of Common Stock immediately
theretofore purchasable and receivable upon the exercise of the rights
represented hereby, such shares of stock, securities or assets as may be issued
or payable in such reclassification, consolidation, merger, sale or lease with
respect to or in exchange for the number of shares of Common Stock purchasable
and receivable upon the exercise of the rights represented hereby had such
rights been exercised immediately prior thereto, and in any such case
appropriate provision shall be made with respect to the rights and interests of
the Holder to the end that the provisions hereof (including without limitation
provisions for adjustments of the Exercise Price and of the number of shares of
Common Stock purchasable and receivable upon the exercise of the Warrant) shall
thereafter be applicable, as nearly as may be, in relation to any shares of
stock, securities or assets thereafter deliverable upon the exercise hereof.
The Company will not effect any such reclassification, consolidation, merger,
sale or lease, unless prior to or as soon as practicable following the
consummation thereof the successor corporation (if other than the Company)
resulting from such reclassification, consolidation or merger or the
corporation purchasing or leasing such assets shall assume by a supplemental
Warrant, executed and mailed or delivered to the Holder, the obligation to
deliver to the Holder such shares of stock, securities or assets as, in
accordance with the foregoing provisions, Holder may be entitled to purchase.

                 If the issuer of securities deliverable upon exercise of the
supplemental Warrant is an affiliate of the formed, surviving, transferee or
lessee corporation, that issuer shall join in the supplemental Warrant.

                 If this subsection (g) applies, subsections (a), (b) and (c)
of this Section 7 do not apply.

         (h)     Adjustment in Number of Shares of Common Stock.

                 Upon each adjustment of the Exercise Price pursuant to this
Section 7, the Warrant outstanding prior to the making of the adjustment in the
Exercise Price shall thereafter evidence the right to receive upon payment of
the adjusted Exercise Price that number of shares of Common Stock (calculated
to the nearest 1/20th of a share) obtained from the following formula:





                                       8
<PAGE>   11
                                          E
                                N' = N x  --
                                          E'


where:

     N' =        the adjusted number of Warrant Shares issuable upon exercise
                 of the Warrant by payment of the adjusted Exercise Price.

     N  =        the number of Warrant Shares previously issuable upon exercise
                 of the Warrant by payment of the Exercise Price prior to
                 adjustment.

     E' =        the adjusted Exercise Price.

     E  =        the Exercise Price prior to adjustment.

         (i)     Disputes; Fair Market Value Determination.

                 If a dispute shall at any time arise between the Company and
the Holder with respect to any matters hereunder including adjustments to the
number of shares of Common Stock, the Exercise Price, or a determination as to
Fair Market Value provided for herein, such dispute shall be conclusively
determined by either the Holder and the Company agreeing on a single
independent investment bank of recognized national standing to resolve the
dispute or, if the Holder and the Company cannot agree on a single investment
bank after an additional seven days, each of the Holder and the Company shall
appoint an independent investment bank of recognized national standing with
appropriate experience involving companies comparable to the Company and the
dispute shall be mutually resolved by the two investment banks.  If the two
investment banks are not able to reach agreement within 20 days, then they
shall within five days appoint a third independent investment bank of
recognized national standing with appropriate experience involving companies
comparable to the Company and the dispute shall be definitively resolved by
such third investment bank within 20 days.  Each party shall pay the costs,
fees and expenses of its respective investment bankers and the parties shall
split the costs of the third investment bank.

         (j)     Form of Warrant.

                 Irrespective of any adjustments in the Exercise Price or the
number or kind of shares purchasable upon the exercise of the Warrant, any
Warrant theretofore or thereafter issued may continue to express the same price
and number and kind of shares as are stated in the Warrant initially issuable.

                 SECTION 8.  Fractional Interests.  The Company shall not be
required to issue fractional Warrant Shares on the exercise of the Warrant.
The number of full Warrant Shares which shall be issuable upon the exercise
thereof shall be computed on the basis of the aggregate number of Warrant
Shares purchasable on exercise of the Warrants so presented.  If any fraction
of a Warrant Share would, except for the provisions of this Section 8, be
issuable on the





                                       9
<PAGE>   12
exercise of Warrant (or specified portion thereof), the Company shall pay an
amount in cash equal to the Fair Market Value on the day immediately preceding
the date the Warrant is presented for exercise, multiplied by such fraction.

                 SECTION 9.  Notices to the Holder.  Upon any adjustment of the
Exercise Price pursuant to Section 7, the Company shall promptly thereafter (i)
cause to be filed with the Secretary of the Company a certificate setting forth
the Exercise Price after such adjustment and setting forth in reasonable detail
the method of calculation and the facts upon which such calculations are based
and setting forth the number of Warrant Shares (or portion thereof) issuable
after such adjustment in the Exercise Price, upon exercise of this Warrant and
payment of the adjusted Exercise Price, and (ii) cause to be given to the
Holder written notice of such adjustments by first-class mail, postage prepaid.
Where appropriate, such notice may be given in advance and included as a part
of the notice required to be mailed under the other provisions of this Section
9.

                 In case:

                 (a)      the Company shall authorize the issuance to all
         holders of shares of Common Stock of rights, options or warrants to
         subscribe for or purchase shares of Common Stock or of any other
         subscription rights or warrants; or

                 (b)      the Company shall authorize the distribution to all
         holders of shares of Common Stock of evidences of its indebtedness or
         assets (other than cash dividends or cash distributions payable out of
         earnings or earned surplus or dividends or distributions payable in
         shares of Common Stock); or

                 (c)      of any consolidation or merger to which the Company
         is a party and for which approval of any shareholders of the Company
         is required, or of the conveyance or transfer of all or substantially
         all of the properties and assets of the Company, or of any
         reclassification or change of Common Stock issuable upon exercise of
         the Warrant (other than a change in par value, or from par value to no
         par value, or from no par value to par value, or as a result of a
         subdivision or combination), or a tender offer or exchange offer for
         shares of Common Stock; or

                 (d)      of the voluntary or involuntary dissolution,
         liquidation or winding up of the Company; or

                 (e)      the Company proposes to take any action that would
         require an adjustment in the Exercise Price pursuant to subsections
         (a), (b) or (c) of Section 7 and if the Company does not arrange for
         the Holder to participate pursuant to subsection (f) of Section 7, or
         if the Company takes any action that would require a supplemental
         Warrant pursuant to subsection (g) of Section 7;

then the Company shall cause to be given to the Holder, at least 10 days prior
to the applicable record date hereinafter specified, or promptly in the case of
events for which there is no record date, by first-class mail, postage prepaid,
a written notice stating (i) the date as of which the





                                       10
<PAGE>   13
holders of record of shares of Common Stock to be entitled to receive any such
rights, options, warrants or distribution are to be determined, or (ii) the
initial expiration date set forth in any tender offer or exchange offer for
shares of Common Stock, or (iii) the date on which any such consolidation,
merger, conveyance, transfer, dissolution, liquidation or winding up is
expected to become effective or consummated, and the date as of which it is
expected that holders of record of shares of Common Stock shall be entitled to
exchange such shares for securities or other property, if any, deliverable upon
such reclassification, consolidation, merger, conveyance, transfer,
dissolution, liquidation or winding up; provided, however, that the Holder
shall not be entitled to receive notice prior to any public announcement
thereof by the Company.  The failure to give the notice required by this
Section 9 or any defect therein shall not affect the legality or validity of
any distribution, right, option, warrant, consolidation, merger, conveyance,
transfer, dissolution, liquidation or winding up, or the vote upon any action.

                 Nothing contained in this Warrant shall be construed as
conferring upon the Holder the right to vote or to consent or to receive notice
as shareholders in respect of the meetings of shareholders or the election of
Directors of the Company or any other matter, or any rights whatsoever as
shareholders of the Company.

                 SECTION 10.  Notices to Company and the Holder.  Unless
otherwise provided herein, any notice, request, instruction or other document
to be given hereunder by any party to the others shall be in writing and
delivered in person or by courier or by facsimile transmission (with receipt
confirmed), or mailed by certified mail, postage prepaid, return receipt
requested (such mailed notice to be effective on the date such receipt is
acknowledged), as follows:

         If to the Company:

                          Guilford Pharmaceuticals Inc.
                          6611 Tributary Street
                          Baltimore, Maryland 21224
                          Attn: Corporate Secretary
                          Telecopy No.: (410) 631-6899

         With a copy to:

                          Hogan & Hartson, L.L.P.
                          111 South Calvert Street, 16th Floor
                          Baltimore, Maryland  21202
                          Attn:  Michael Silver, Esq.
                          Telecopy No.: (410) 539-6981





                                       11
<PAGE>   14
         If to the Holder:

                          Amgen Inc.
                          Amgen Center
                          1840 DeHavilland Drive
                          Thousand Oaks, California 91320-1789
                          Attn: Corporate Secretary
                          Telecopy No.: (805) 499-8011

         With a copy to:

                          Latham & Watkins
                          633 West Fifth Street, Suite 4000
                          Los Angeles, California 90071
                          Attn: Gary Olson, Esq.
                          Telecopy No.: (213) 891-8763

or to such other place and with such other copies as either party may designate
as to itself by written notice to the others.

                 SECTION 11.  Supplements and Amendments.  The Company may not
supplement or amend this Warrant without the prior written approval of the
Holder.

                 SECTION 12.  Successors and Assignment.  All the covenants and
provisions of this Warrant by or for the benefit of the Company shall bind and
inure to the benefit of its respective successors and assigns hereunder.  This
Warrant is not assignable or transferable by the Holder except in increments of
100,000 Warrant Shares or by operation of law.

                 SECTION 13.  Governing Law.  This Warrant shall be deemed to
be a contract made under the laws of the State of Delaware and for all purposes
shall be construed in accordance with the internal laws of said State,
excluding choice of law provisions.

                 SECTION 14.  Benefits of This Warrant.  Nothing in this
Warrant shall be construed to give to any person or corporation other than the
Company and the Holder any legal or equitable right, remedy or claim under this
Warrant; but this Warrant shall be for the sole and exclusive benefit of the
Company and the Holder.

                 SECTION 15.  Counterparts.  This Warrant may be executed in
any number of counterparts and each of such counterparts shall for all purposes
be deemed to be an original, and all such counterparts shall together
constitute but one and the same instrument.

                           [Signature Page To Follow]





                                       12
<PAGE>   15
Date:  October 1, 1997                GUILFORD PHARMACEUTICALS INC.
                                      
                                      
                                      
                                      By:  /S/ CRAIG R. SMITH, M.D.             
                                           -------------------------------------
                                           Name:    Craig R. Smith, M.D.
                                           Title:   President and Chief 
                                                     Executive Officer
                                      
- ------------------------------------  
Seal                                  
                                      
                                      
                                      
                                      
Attest:  /S/ THOMAS C. SEOH          
         -----------------------------
         Secretary                             
                                      
                                      
                                      RECEIVED BY:
                                      
                                      AMGEN INC.
                                      
                                      
                                                     
                                      By:                                      
                                           ------------------------------------
                                           Name:    George A. Vandeman
                                           Title:   Senior Vice President, 
                                                     General Counsel and 
                                                     Secretary
                                      
- ------------------------------------  
Seal                                  
                                      
                                      
                                      
                                      
Attest:                               
         --------------------------   
         Secretary




                                      S-1
<PAGE>   16
                         [Form of Election to Purchase

                   (To Be Executed Upon Exercise Of Warrant)


                 The undersigned hereby irrevocably elects to exercise the
right, represented by this Warrant, to receive _________ shares of Common Stock
and herewith tenders payment for such shares to the order of GUILFORD
PHARMACEUTICALS INC. in the amount of $_____ in accordance with the terms
hereof.  The undersigned requests that a certificate for such shares be
registered in the name of _______________________________________, whose
address is _______________________________ and that such shares be delivered to
________________ whose address is _________________________________.  If said
number of shares is less than all of the shares of Common Stock purchasable
hereunder, the undersigned requests that a new Warrant representing the
remaining balance of such shares be registered in the name of ______________,
whose address is  _________________________, and that such Warrant be delivered
to _________________, whose address is __________________.

                 The undersigned represents that the aforesaid shares of Common
Stock are being acquired for the account of the undersigned for investment and
not with a view to, or for resale in connection with, the distribution thereof
and that the undersigned has no present intention of distributing or reselling
such shares.

                 The undersigned is an "accredited investor" as defined in
Securities and Exchange Commission Rule 501(a) pursuant to the Securities Act
of 1933, as amended.

                                              Signature:                       
                                                         ----------------------
                                        
                                        
                                        
Date:                                   
      ----------------------------      
                                        
                                        
                                        
                                        Signature Guaranteed:                  
                                                              -----------------


<PAGE>   1
                                                                   EXHIBIT 10.53
                             [GUILFORD LETTERHEAD]


                                  July 9, 1997


William C. Vincek, Ph.D.
116 Serrano Way
Chapel Hill, NC 27514-8545

Dear Bill:

         I am pleased to offer you employment with Guilford Pharmaceuticals
Inc. on the following terms:

         1.    Your title will be Vice President, Corporate Quality.  In this
               capacity you will serve as an officer of the Company, serve on
               the Guilford Management Committee, and will report to and serve
               at the discretion of the President and Chief Executive Officer.

         2.    In consideration of your services, the Company will provide the
               following compensation:

               a.    Salary:  Your salary will be $13,000 per month (an annual
                     rate of $156,000), payable semi-monthly.  Your performance
                     and salary will be reviewed annually.

               b.    Bonus:  As an officer of the Company, you will be entitled
                     to receive such bonuses, if any, as are payable pursuant
                     to the Bonus Plan the Board of Directors has adopted.

               c.    Joining Bonus:  To assist you in the transition to your
                     new position, the Company will pay you a joining bonus of
                     $13,000.  This payment will be made within 30 days of the
                     date of your employment and will be subject to all
                     deductions required by law.

               d.    Equity Offering:  The Company will offer you 5,000 shares
                     of its common stock on the following basis:

                     i)     These shares will vest 25% per year for four years.

                     ii)    In the event your employment with the Company is
                            terminated for cause, you voluntarily leave the
                            Company, or you are unable to perform your duties
                            for any reason, the unvested shares will
                            immediately revert to the Company.
<PAGE>   2
William C. Vincek, Ph.D.
July 9, 1997
Page Two

                     iii)   In the event that your employment is terminated
                            within one year after a change in control of the
                            Company, all non-vested shares held by you shall
                            immediately vest.

               e.    Stock Options:  The Company will award you Non-Qualified
                     stock options to purchase 37,500 shares of its common
                     stock, subject to approval of this award by the Board of
                     Directors.  The price of the options will be the fair
                     market value of the stock on the trading date immediately
                     preceding the grant date.  These options will vest 50%
                     after two years, 75% after three years, and 100% after
                     four years from the date of the grant.

         3.    In addition to the compensation described above, you will be
               eligible for the following benefits:

               a.    Relocation:  To assist you in relocating to the Baltimore
                     area, the Company will:

                     i)     Pay for two trips to the Baltimore area for you to
                            find living accommodations.  Reasonable travel and
                            hotel expenses will be reimbursed.

                     ii)    Pay the direct cost of moving your household
                            possessions from North Carolina to the Baltimore
                            area. 

                     iii)   Pay the closing costs for a new home in the
                            Baltimore area up to 3 1/2% of its purchase price,
                            grossed-up for tax purposes.  This includes up to
                            two points on a mortgage (one point loan
                            origination fee and one discount point on a
                            mortgage).

                     iv)    To assist you in your transition to Maryland,
                            Guilford will pay you temporary housing assistance
                            of up to $1,000 per month for up to three months.

                     Should you terminate your employment with the company
                     within one year of your date of hire, you will be
                     responsible for reimbursement to the Company of the
                     relocation expenses, prorated for the term of your
                     employment.

               b.    Insurance:   The Company will offer medical, dental,
                     vision, life, accidental death, short-term and long-term
                     disability insurance as described in the attached.

               c.    Vacation:  You will be entitled to 20 vacation days and 11
                     paid Company Holidays.
<PAGE>   3
William C. Vincek, Ph.D.
July 9, 1997
Page Two


               d.    401(k) Match:   Once you meet the employment eligibility
                     requirements to participate in the company's 401(k) Plan,
                     you will be eligible to receive the Company match which
                     was recently approved by the Board of Directors.  Guilford
                     will match 50% of the first 6% of employee salary
                     deferral.  The match will be in the form of Guilford
                     stock.

         In accordance with the Immigration Reform Act of 1986, on your first
day of work, and from time to time thereafter, you will be required to present
documentation that proves your identity and legal right to work in the United
States.  Employment with the company is contingent on your being able to meet
this requirement.

         In the event your employment is terminated by the Company other than
for cause, you would be entitled to severance in the form of a continuation of
your then-current base salary, as follows:

         1.    Six months salary if the termination occurs in the first twelve
               months of your employment; and

         2.    Twelve months salary if the termination occurs thereafter.

         Such payments (except those resulting from a change in control) would
cease upon your commencement of full-time employment during the payment period.
During the severance period, the Company would also reimburse you for the cost
of continuation of  any health, life and disability insurance coverage
available at the time of the termination of employment, provided that the
Company reserves the right to provide equivalent alternative life and
disability coverage based on cost and availability upon conversion from
full-time employment.  If necessary, your cooperation in complying with
application procedures for such coverage is expected.  Remaining benefits of
employment, including your eligibility for any bonus program and the vesting of
unvested options would cease at termination and not continue to accrue during
the severance period.

         This offer is conditioned on your signing a Patent and Confidentiality
Agreement in connection with your employment by the Company.

         Because the position offered is that of an officer of the Company, our
offer is further conditioned on the successful completion of a thorough
background investigation.

         You may accept this offer by signing below and returning the original
letter to me.  I would like you to start at Guilford on or before August 11,
1997.
<PAGE>   4

William C. Vincek, Ph.D.
July 9, 1997
Page Two




                                        Sincerely,
                                        
                                        /S/ CRAIG R. SMITH, M.D.
                                        -------------------------------------
                                        Dr. Craig R. Smith
                                        President and Chief Executive Officer
                                        Guilford Pharmaceuticals Inc.





Agreed to and accepted:


   /S/ WILLIAM C. VINCEK, PH.D.                   10 Jul 97                    
- ------------------------------------       ------------------------------------
William C. Vincek, Ph.D.                   Date





CRS/lft
Enclosures

<PAGE>   1
EXHIBIT 11.3

COMPUTATION OF EARNINGS (LOSS) PER SHARE
(IN THOUSANDS, EXCEPT SHARE DATA)

<TABLE>
<CAPTION>
                                                            THREE MONTHS ENDED SEPTEMBER 30,       NINE MONTHS ENDED SEPTEMBER 30,
                                                               1997                1996               1997                1996    
                                                            -------------      -------------       ------------      -------------
<S>                                                         <C>                <C>                <C>                <C>
Weighted average common shares outstanding                    18,644,369         13,834,919         16,961,043          12,673,911

Dilutive incremental shares assumed to be outstanding
  related to stock options and warrants                        1,408,090          1,543,167                  -           1,540,522

Weighted average common  and common
  equivalent shares used in the computation of              -------------      -------------       ------------      -------------
  earnings (loss) per share                                   20,052,459         15,378,086         16,961,043          14,214,433
                                                            =============      =============       =============     =============

Net income (loss)                                           $      6,341       $     13,188       $     (5,273)       $     11,444
                                                            =============      =============       =============     =============

Earnings (loss) per common share                            $       0.32       $       0.86       $      (0.31)       $       0.81
                                                            =============      =============       =============     =============
</TABLE>

Notes:  (1)  Both primary and fully diluted earnings per share are the same for
             the three and nine months ended September 30, 1997 and 1996, under
             APB 15, "Earnings per Share."



<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               SEP-30-1997
<CASH>                                            7719
<SECURITIES>                                         0
<RECEIVABLES>                                      629
<ALLOWANCES>                                         0
<INVENTORY>                                       1253
<CURRENT-ASSETS>                                 89008
<PP&E>                                          18,844
<DEPRECIATION>                                    3771
<TOTAL-ASSETS>                                  183232
<CURRENT-LIABILITIES>                             7859
<BONDS>                                          11354
                                0
                                          0
<COMMON>                                           193
<OTHER-SE>                                      163826
<TOTAL-LIABILITY-AND-EQUITY>                    183232
<SALES>                                           6032
<TOTAL-REVENUES>                                 21298
<CGS>                                             2060
<TOTAL-COSTS>                                    30919
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 615
<INCOME-PRETAX>                                 (5273)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                             (5273)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    (5273)
<EPS-PRIMARY>                                    (.31)
<EPS-DILUTED>                                    (.31)
        

</TABLE>


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