NAPRO BIOTHERAPEUTICS INC
8-K, 1998-01-30
MEDICINAL CHEMICALS & BOTANICAL PRODUCTS
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                                        SECURITIES AND EXCHANGE COMMISSION
                                               WASHINGTON, DC 20549




                                                     FORM 8-K

                                                  CURRENT REPORT


          Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934



              Date of report (Date of earliest event reported): January 28, 1998

                                            NAPRO BIOTHERAPEUTICS, INC.
                              (Exact Name of Registrant as Specified in Charter)


 Delaware                         0-243201                 84-1187753
(State or Other Jurisdiction of  (Commission File Number) (I.R.S. Employer
Incorporation)                                            Identification Number)


                                              6304 Spine Road, Unit A
                                              Boulder, Colorado 80301
                              (Address of Principal Executive Offices)(Zip code)


              Registrant's telephone number, including area code: (303) 530-3891





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Item 5.  Other Events

         As previously  reported,  on January 6, 1998, the Company  entered into
Agreements  in Principal  relating to  modification  of certain  terms of its 5%
Senior  Convertible  Notes due June 4, 2000 (the  "Notes")  and  Series C Senior
Convertible  Preferred Stock (the "Preferred  Stock").  The Company entered into
definitive agreements relating to such modifications on January 28, 1998.

         The amendment with respect to the Notes (the "Note Amendment")  limits,
under certain  circumstances prior to December 31, 1998: (i) the amount of Notes
that can be converted into Common Stock and (ii) the ability of a holder of Note
to  force  redemption  of the  inconvertible  portions  of the  Note  for  cash.
Similarly,  the amendment  with respect to the Preferred  Stock (the  "Preferred
Stock  Amendment,"  and  together  with the Note  Amendment,  the  "Amendments")
limits,  under certain  circumstances prior to December 31, 1998: (i) the number
of shares of Common Stock that may be issued upon  conversion  of the  Preferred
Stock  and  (ii)  the  ability  of a  holder  of the  Preferred  Stock  to force
redemption of the inconvertible portions of the Preferred Stock for cash.

         Pursuant to the Note Amendment and the Preferred Stock  Amendment,  the
Company  has agreed to propose to its  stockholders,  at a meeting to be held no
later  than June 1, 1998:  (i) an  amendment  to the  Company's  Certificate  of
Incorporation  providing for an increase in the  authorized  Common Stock of the
Company and (ii) approval of issuance of the Common Stock upon the conversion of
the Notes and  Preferred  Stock in certain  circumstances.  The Company has also
agreed to take certain  actions in connection  with the  registration  under the
Securities Act of 1933, as amended,  of shares  issuable upon  conversion of the
Notes and the Preferred Stock.

         Prior to and in connection  with Note Amendment,  the Company  redeemed
$397,000 in principal amount of the Notes. Premium and interest in the amount of
$53,000 were paid in connection with such redemption.

         The Note Amendment and the Preferred Stock Amendment have been filed as
exhibits  to this  Report and are  incorporated  herein by this  reference.  The
description  of  provisions  of the  Note  Amendment  and  the  Preferred  Stock
Amendment in this Report does not purport to be complete and is qualified in its
entirety by reference to such exhibits.


Item 7.       Financial Statements, Pro Forma Financial Information and Exhibits

         (c)      Exhibits.


Exhibit No.                   Exhibit Description
4.1                           Amendment Agreement, dated as of January 28, 1998,
                              by and among the Registrant and the noteholders
                              named therein.


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4.2                         Amendment Agreement, dated as of January 28, 1998,
                            by and between the Registrant and Advantage Fund II,
                            Ltd.


4.3                             Amendment   Number   2  to  the   Agreement   in
                                Principle,  dated as of January 27, 1998, by and
                                between the  Registrant  and  Omicron  Partners,
                                L.P.


                                                    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 hereunto duly authorized.


                                                    NAPRO BIOTHERAPEUTICS, INC.



                                                    By:  \s\ Gordon H. Link, Jr.
                                                             Gordon H. Link, Jr.
                                                         Chief Financial Officer

Date:  January 30, 1998



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<PAGE>



Exhibit 4.1



                                                 January 28, 1998



NaPro BioTherapeutics, Inc.
6304 Spine Road
Unit A
Boulder, Colorado  80301

Attn:  Vice President and Chief Financial Officer

Gentlemen:

         Reference is made to (i) the Note Purchase  Agreements  (the  "Purchase
Agreements")  dated as of May 30,  1997 among  NaPro  BioTherapeutics,  Inc.,  a
Delaware corporation (the "Company"), and the various Buyers parties thereto, as
amended to date, (ii) the Engagement  Letter dated May 12, 1997 (the "Engagement
Letter")  between  the  Company  and  Diaz &  Altschul  Capital,  LLC  ("Diaz  &
Altschul");  (iii)  each of the  Senior  Convertible  Notes of the  Company,  as
amended to date (each,  a "Note") and (iv)  warrants to purchase an aggregate of
323,700 shares of common stock of the Company,  issued to the Buyers and certain
of which are held by Diaz & Altschul Group,  LLC (the  "Warrants").  Capitalized
terms used herein and not defined  shall have the  meanings  assigned to them in
the Purchase Agreements and the Notes.

         The various Holders and the Company agree as follows:

         (a) (1) The Company  agrees to hold an annual  meeting of  stockholders
(the "Annual  Meeting") no later than June 1, 1998. Prior to the Annual Meeting,
the Board of Directors of the Company shall recommend to the  stockholders  that
they (i) approve an  amendment to the  Company's  Certificate  of  Incorporation
which shall increase the authorized  Common Stock to 30,000,000  shares and (ii)
effect the  Stockholder  Approval.  The Board of  Directors  of the Company will
solicit proxies to vote the  outstanding  shares of Common Stock in favor of the
actions specified in clauses (i) and (ii) of the immediately  preceding sentence
and the Company shall  otherwise use its best efforts to obtain approval of such
actions by the holders of the outstanding Common Stock. If the stockholders take
the action  specified  in clause (i) and fail to take the actions  specified  in
clause (ii) of the first  sentence of this  paragraph (a), the Company shall use
its best efforts to obtain a waiver by Nasdaq of the Stockholder  Approval.  The
Company  may cease  taking  further  steps to fulfill the  requirements  of this
paragraph  (a) if at any time  prior  to  performance  in full of the  Company's
obligations  under this paragraph (a)(1) no Notes are outstanding or the Company
shall have redeemed all  outstanding  Notes pursuant to Section 1.2 of the Notes
by payment in full of the  Optional  Redemption  Price  thereof  after giving an
Optional Redemption Notice therefor in accordance with Section 1.2 of the Notes.

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<PAGE>



                  (2) If the stockholders  fail to take the actions specified in
clauses (i) and (ii) of the first sentence of paragraph  (a)(1),  so long as the
Company is in compliance in all material  respects with its  obligations  to the
Holders,  then on June 1, 1998,  this Agreement shall terminate and the terms of
the Notes and  Warrants  shall be those in  effect  on the date  hereof  without
giving effect to the amendments  contained herein,  except that Sections (n) and
(o) hereof shall remain in effect.

     (b)  Section 2.2 of the Notes is amended  and  restated in its  entirety to
read as follows:

                           2.2 Authorized  Shares.  The Company  covenants that,
                  during the period the conversion  rights exist,  (i) until the
                  date on  which  the  Stockholder  Approval  is  effected,  the
                  Company will reserve from its authorized  and unissued  Common
                  Stock an aggregate of 2,222,222 shares for issuances  pursuant
                  hereto from the  Issuance  Date  through the date on which the
                  Stockholder  Approval is  effected,  and (ii) from the date on
                  which the Stockholder  Approval is effected  through  December
                  31, 1998,  the Company will  reserve from its  authorized  and
                  unissued  Common Stock an  aggregate  of 3,820,000  shares for
                  issuances  pursuant  hereto  from the  Issuance  Date  through
                  December 31, 1998 (such amounts referred to in clauses (i) and
                  (ii) above to be subject to equitable  adjustment from time to
                  time on terms  reasonably  acceptable  to the Holder for stock
                  splits, stock dividends, combinations, capital reorganizations
                  and similar events  relating to the Common Stock  occurring on
                  or after the  Issuance  Date) to provide  for the  issuance of
                  Common  Stock upon the  conversion  of this Note and the Other
                  Notes, subject to reduction from time to time by the number of
                  shares of Common Stock issued on  conversion  of this Note and
                  the  Other  Notes.  The  Company  shall,  from  time to  time,
                  authorize and reserve  additional shares of Common Stock to be
                  issuable  pursuant  to the  terms  of this  Note as  shall  be
                  necessary  to ensure any  payment of  interest on this Note in
                  accordance  with  Section  1.1.  and on  the  Other  Notes  in
                  accordance  with the terms thereof.  In addition,  the Company
                  shall,  after  December 31, 1998 and so long as any conversion
                  rights  exist  hereunder,  authorize  and  reserve  additional
                  shares of Common Stock to be issuable pursuant to the terms of
                  this Note as shall be  necessary  to ensure  that an  adequate
                  number of shares of Common  Stock are at all times  authorized
                  and reserved for issuance  upon full  conversion  of this Note
                  and the Other Notes. The Company  represents and warrants that
                  upon  issuance,  such shares of Common  Stock will be duly and
                  validly  issued,  fully paid and  non-assessable.  The Company
                  agrees that its  issuance of this Note shall  constitute  full
                  authority  to its officers and agents who are charged with the
                  duty of executing stock  certificates to execute and issue the
                  necessary  certificates  for  shares of Common  Stock upon the
                  conversion of and payment of interest on this Note.

         (c) So long as the Company is in  compliance  in all material  respects
with  its  obligations  to  the  Holders,  including,  without  limitation,  the
obligations of the Company under the  Transaction  Documents and this Agreement,
during the period beginning on

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<PAGE>



December 19, 1997 and ending  December 31, 1998,  the Holders hereby waive their
rights to  require to the  Company  to redeem  the Notes due to a Maximum  Share
Amount Inconvertibility, including any rights to receive notice.

     (d) A new Section 2.5 and a new Section 2.6 are added at the end of Article
II to read as follows:

                  2.5 Other  Inconvertibility  Events.  If at any time following
                  the  Stockholder  Approval,  the Company or the Holder becomes
                  aware of any facts that would  cause any  portion of this Note
                  to  be  inconvertible,  other  than  a  Maximum  Share  Amount
                  Inconvertibility     or     a     Registration     Restriction
                  Inconvertibility,  such person  shall  promptly  give  written
                  notice  of such  facts  to the  other  person.  Promptly  upon
                  receipt by the  Company of such  notice (if the Company is the
                  receiving person) or in such notice (if the Company sends such
                  notice),  if the  Company  agrees  that such  inconvertibility
                  exists,  the  Company  shall  make an  offer  to  redeem  such
                  inconvertible  portion of this Note within 10 Business Days at
                  the Redemption  Price.  Such Redemption Price shall be payable
                  by the  Company in four  equal  monthly  installments  and the
                  principal amount of this Note shall be reduced  accordingly as
                  such  payments  are made.  Such  inconvertible  portion  to be
                  redeemed  on or after  January  1, 1999  shall be the  largest
                  amount of this Note which could not be  converted  at any time
                  on or after the Stockholder Approval.

                  2.6      Limitation on Conversion Under Certain Circumstances.

                           (a)  Notwithstanding  any other provision herein, (A)
                  the Holder  shall have no right to convert  any portion of the
                  principal amount of this Note (and accrued and unpaid interest
                  thereon and on any such  interest)  if such  conversion  would
                  result in (i) the  aggregate  number of shares of Common Stock
                  issued  hereunder  during the period beginning on the Issuance
                  Date  and  ending  on  December  31,  1998  (whether   through
                  conversion  (including  pursuant  to Section (h) of the letter
                  agreement dated January 28, 1997 among the Company, the Holder
                  and the holder of the Other Notes (the "Amendment Agreement"))
                  or  in  payment  of  interest  or  otherwise)   exceeding  the
                  Aggregate Allotment (as defined in the Amendment Agreement) of
                  this  Note,  and (B)  subject to  Section  1.2(b),  during the
                  period beginning on January 1, 1998 and ending on December 31,
                  1998,  the Holder shall not be entitled to convert any portion
                  of this Note at a Conversion  Price that is less than $4.00 if
                  such conversion would result in the aggregate number of shares
                  of Common Stock issued hereunder  (whether through  conversion
                  or in payment of  interest  or  otherwise  but  excluding  any
                  shares  issued  pursuant  to  Section  (h)  of  the  Amendment
                  Agreement) at a Conversion  Price (or Computed  Price,  in the
                  case of Payment  Shares)  that is less than  $4.00  during the
                  calendar  month  of the  proposed  conversion  for  which  the
                  determination under this

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<PAGE>



                  clause (B) is being made  exceeding the Monthly  Allotment (as
                  defined in the Amendment Agreement).

                           (b) Notwithstanding any other provision herein, until
                  the Stockholder Approval is obtained, the Holder shall have no
                  right to convert any portion of the  principal  amount of this
                  Note (and accrued and unpaid interest  thereon and on any such
                  interest) if such  conversion  would  result in the  aggregate
                  number of shares of Common  Stock  issued  hereunder  (whether
                  through  conversion  (including  pursuant  to Section  (h) the
                  Amendment  Agreement)  or in payment of interest or otherwise)
                  exceeding  the Initial  Allotment (as defined in the Amendment
                  Agreement).

                           (c) The  provisions  contained  in this  Section  2.6
                  shall be of no further  force and effect if (i) the Company is
                  acquired   by   another   person  by  means  of  any   merger,
                  consolidation,  sale or all or substantially all assets of the
                  Company, share exchange or other business combination (each, a
                  "Transaction"),  (ii) the Company enters into any  Transaction
                  where the  shareholders  of the Company  immediately  prior to
                  such  Transaction do not  collectively own at least 51% of the
                  outstanding voting securities of the surviving  corporation of
                  such Transaction immediately following such Transaction, (iii)
                  the   Company   enters  into  any   agreement   for  any  such
                  Transaction,  (iv) a Tender Offer is consummated  for at least
                  51% of the  outstanding  shares  of  Common  Stock  or (v) the
                  Company  fails to  comply  in any  material  respect  with its
                  obligations to the Holder, including,  without limitation, the
                  Amendment  Agreement  or  the  Note  Purchase  Agreement,  the
                  Warrants or this Note as amended by the Amendment Agreement.

     (e)  "Aggregate  Allotment"  shall mean the following  with respect to each
Note:



                    Note                                     Aggregate Allotment
                    ----
                     1                                                 1,422,562
                     2                                                   768,537
                     3                                                   768,142
                     4                                                   659,119
                     5                                                    92,100
                     6                                                   109,540

     (f) "Initial Allotment" shall mean the following with respect to each Note:


                    Note                                       Initial Allotment
                     1                                                   835,259
                     2                                                   418,413


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<PAGE>




                     3                                                   418,198
                     4                                                   431,799
                     5                                                    53,893
                     6                                                    64,660

     (g) "Monthly Allotment" shall mean the following with respect to each Note:


                    Note                                       Monthly Allotment
                    ----
                     1                                                   110,272
                     2                                                    65,740
                     3                                                    65,706
                     4                                                    42,682
                     5                                                     7,174
                     6                                                     8,427

         (h) Notwithstanding  any inconsistent  provisions of Section 2.1 of the
Notes,  Nelson  Partners and Olympus  Securities Ltd. (but not any transferee of
their interests in the Notes), taken together,  and Delta Opportunity Fund, Ltd.
and OTATO L.P. (but not any transferee of their  interests in the Notes),  taken
together,  shall each have the right at any time to convert an aggregate  amount
of  principal  of and  interest on the Notes  equal to $236,250 at a  Conversion
Price of $1.575, which right shall not affect the conversion rights set forth in
Section  2.6(a)(ii) of the Notes.  The principal  amount of such Notes shall, in
such case, be reduced in the manner set forth in Section 2.3 of the Notes.

     (i) A new  Section  3.9 is added at the end of Article  III of each Note to
read as follows:

                  3.9  Limitation  on  Liens.  Until  (x)  June 1,  1998 (if the
                  Stockholder Approval is not obtained on or prior to such date)
                  or (y)  December  31,  1998 (if the  Stockholder  Approval  is
                  obtained  on or prior to June 1,  1998),  while  any Notes are
                  outstanding,  the Company will not, and will not permit any of
                  its  subsidiaries  to,  without prior  written  consent of the
                  Majority Holders, create, incur, assume or suffer to exist any
                  Liens  of any kind  against  or upon  any of its  property  or
                  assets, or any proceeds  therefrom,  unless (i) in the case of
                  Liens securing  indebtedness that is expressly  subordinate or
                  junior in right of payment to the Notes, the Notes are secured
                  by a Lien on such property,  assets or proceeds that is senior
                  in  priority  to such Liens and (ii) in all other  cases,  the
                  Notes are equally and  ratably  secured,  except for (A) Liens
                  existing  as of the  date  of  the  Amendment  Agreement  (the
                  "Amendment Date") and any extensions, renewals or replacements
                  thereof,  (B) Liens  securing  the Notes,  (C) Liens  securing
                  intercompany  indebtedness  of the Company or a subsidiary  of
                  the Company and (D) Permitted Liens.


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     (j) The  first  sentence  of  Section  1.2(a) of the  Notes is  amended  by
deleting "50%" and replacing it with "100%".

     (k) Section  1.2(b) of the Notes is amended and restated in its entirety to
read:

                           (b) The  Company  shall  not be  entitled  to give an
                  Optional  Redemption  Notice or to redeem any  portion of this
                  Note with  respect to which the Holder has given a  Conversion
                  Notice.  Notwithstanding  the giving of an Optional Redemption
                  Notice,  the Holder shall be entitled to convert in accordance
                  with the terms of this Note such  portion  of this Note  which
                  otherwise is to be redeemed in  accordance  with such Optional
                  Redemption  Notice  and would  convert  into  shares of Common
                  Stock  sufficient  to cover  open and short  positions  in the
                  Common  Stock held by the  Holder on the date of the  Optional
                  Redemption  Notice,  by giving a Conversion Notice at any time
                  prior to the later of (1) the date which is one  Business  Day
                  prior to the applicable  Optional  Redemption Date and (2) the
                  date on which the Company pays the Optional  Redemption  Price
                  of such portion of this Note to the Holder; provided, however,
                  that  if the  Company  defaults  in  payment  of the  Optional
                  Redemption  Price,  the Holder shall thereafter be entitled to
                  convert this Note.

         (l)  The  definition  of  "Optional   Redemption  Date"  and  "Optional
Redemption  Price"  in  Section  7.1 of the Note are  amended  and  restated  as
follows:

     "Optional Redemption Date" means, as applicable,  a 1998 Redemption Date or
a Subsequent Redemption Date.

                  "Optional  Redemption  Price" means,  as applicable,  the 1998
                  Redemption Price or the Subsequent  Redemption Price. The 1998
                  Redemption  Price shall be payable on any 1998 Redemption Date
                  and the  Subsequent  Redemption  Price shall be payable on any
                  Subsequent Redemption Date.

     (m) The following  definitions  are added to Section 7.1 of the Note in the
appropriate alphabetical order:

                  "Lien" means,  with respect to any asset, any mortgage,  lien,
                  pledge,  charge,  security interest or encumbrance of any kind
                  in respect of such  asset,  whether or not filed,  recorded or
                  otherwise   perfected  under  applicable  law  (including  any
                  conditional sale or other title retention agreement, any lease
                  in the nature  thereof,  any option or other agreement to sell
                  or give a security  interest in and any filing of or agreement
                  to give any financing  statement under the Uniform  Commercial
                  Code (or equivalent statutes) of any jurisdiction).

                  "1998  Redemption  Date"  means any  Business  Day  during the
                  period  commencing on the Issuance Date and ending on December
                  31, 1998.

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                  "1998  Redemption  Price" means an amount in cash equal to the
                  sum of (1) the product  obtained by multiplying (A) the sum of
                  (i) the outstanding  principal amount of the Note specified in
                  an Optional Redemption Notice as being required to be redeemed
                  by the Company plus (ii)  accrued and unpaid  interest on such
                  principal  amount to the  Optional  Redemption  Date times (B)
                  130% plus (2) accrued and unpaid Default Interest,  if any, on
                  the amount  referred to in the  immediately  preceding  clause
                  (1)(A)(ii)  at the rate  provided in this Note to the Optional
                  Redemption  Date. The 1998 Redemption  Price shall be adjusted
                  to reflect the reduced  outstanding  principal  amount of this
                  Note and related accrued  interest on the Optional  Redemption
                  Date  resulting  from any permitted  conversions  of this Note
                  after the  Optional  Redemption  Notice is given  pursuant  to
                  Section 1.2(b).

                  "Permitted Liens" means the following types of Liens:

                           (1)  Liens for  taxes,  assessments  or  governmental
                  charges or claims  either (a) not  delinquent or (b) contested
                  in good faith by appropriate  proceedings  and as to which the
                  Company or its subsidiaries  shall have set aside on its books
                  such  reserves  as  may  be  required  pursuant  to  Generally
                  Accepted Accounting Principles;

                           (2)  statutory   Liens  of  landlords  and  Liens  of
                  carriers,  warehousemen,  mechanics,  suppliers,  materialmen,
                  repairmen  and other  Liens  imposed  by law  incurred  in the
                  ordinary  course of business  for sums not yet  delinquent  or
                  being  contested  in good  faith,  if such  reserve  or  other
                  appropriate  provision,  if  any,  as  shall  be  required  by
                  Generally Accepted Accounting  Principles shall have been made
                  in respect thereof;

                           (3) Liens  incurred or deposits  made in the ordinary
                  course of business in connection  with workers'  compensation,
                  unemployment  insurance  and other  types of social  security,
                  including  any Lien  securing  letters of credit issued in the
                  ordinary  course of business  consistent with past practice in
                  connection therewith, or to secure the performance of tenders,
                  statutory obligations,  surety and appeal bonds, bids, leases,
                  government  contracts,  performance and return-of-money  bonds
                  and other similar  obligations  (exclusive of obligations  for
                  the payment of borrowed money);

     (4) judgment Liens not giving rise to an Event of Default:

                           (5) easements, rights-of-way, zoning restrictions and
                  other  similar  charges  or  encumbrances  in  respect of real
                  property  not  interfering  in any  material  respect with the
                  ordinary course of the business of the Company;


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     (6)  any  interest  or  title  of a  lessor  under  any  capitalized  lease
obligation;

     (7)  purchase  money Liens to finance  property or assets of the Company or
any subsidiary of the Company acquired in the ordinary course of business;

                           (8) Liens upon  specific  items of inventory or other
                  goods  and  proceeds  of any  person  securing  such  person's
                  obligations  in  respect  of  bankers'  acceptances  issued or
                  created  for the  account  of such  person to  facilitate  the
                  purchase,  shipment,  or  storage of such  inventory  or other
                  goods;
                           (9) Liens  securing  reimbursement  obligations  with
                  respect  to  commercial   letters  of  credit  which  encumber
                  documents  and other  property  relating  to such  letters  of
                  credit and products and proceeds thereof;

                           (10)  Liens  encumbering   deposits  made  to  secure
                  obligations arising from statutory,  regulatory,  contractual,
                  or  warranty  requirements  of  the  Company  or  any  of  its
                  subsidiaries, including rights of offset and set-off;

     (11) leases or subleases granted to others that do not materially interfere
with the ordinary course of business of the Company and its subsidiaries; and

     (12) Liens arising from filing Uniform Commercial Code financing statements
regarding leases.

                  "Subsequent  Redemption Date" means any Business Day beginning
                  on  January  1, 1999 and  ending on the first date on which no
                  principal amount of this Note is outstanding.

                  "Subsequent Redemption Price" means an amount in cash equal to
                  the sum of (1) the product obtained by multiplying (A) the sum
                  of (i) the outstanding  principal amount of the Note specified
                  in an  Optional  Redemption  Notice  as being  required  to be
                  redeemed by the Company plus (ii) accrued and unpaid  interest
                  on such principal amount to the Optional Redemption Date times
                  (B) 110% plus (2) accrued and unpaid Default Interest, if any,
                  on the amount referred to in the immediately  preceding clause
                  (1)(A)(ii)  at the rate  provided in this Note to the Optional
                  Redemption  Date.  The  Subsequent  Redemption  Price shall be
                  adjusted to reflect the reduced  outstanding  principal amount
                  of this Note and  related  accrued  interest  on the  Optional
                  Redemption  Date resulting  from any permitted  conversions of
                  this  Note  after  the  Optional  Redemption  Notice  is given
                  pursuant to Section 1.2(b).

     (n) The proviso at the end of the definition of Conversion Price in Section
7.1 of the Note is amended and restated as follows:

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<PAGE>



                  provided,  however,  that (i) on any date on or after March 1,
                  1998 but prior to June 1, 1998, the Conversion Price shall not
                  be greater than 110% of the  arithmetic  average of the Market
                  Price of the  Common  Stock  for the  period  of  thirty  (30)
                  consecutive Trading Days ending one Trading Day prior to March
                  1,  1998  (the  "March  Cap") and (ii) on any date on or after
                  June 1, 1998, the  Conversion  Price shall not be greater than
                  the lesser of (A) 110% of the arithmetic average of the Market
                  Price of the  Common  Stock  for the  period  of  thirty  (30)
                  consecutive  Trading Days ending one Trading Day prior to June
                  1, 1998 and (B) the March Cap.

     (o) The  definition  of  "Purchase  Price" in the  Warrants  is  amended by
deleting "$10.00" and replacing it with "$2.50."

         (p) (1) Within five Business Days of the date hereof, the Company shall
(i) file a Current  Report on Form 8-K  describing  the terms of this  Amendment
Agreement (the "8-K") and (ii) make a good faith determination  within five days
after execution of this Agreement of whether,  pursuant to Section 8 of the Note
Purchase Agreements,  the Company is required to file an additional Registration
Statement or to amend the existing Registration Statement and notify the Holders
in writing of such determination. Notwithstanding Section 8 of the Note Purchase
Agreements,  if the Company so  determines  that such a filing is required,  the
Company  shall file such  Registration  Statement  within 15 days after the date
hereof or such amendment within five Business Days after the date hereof.

                  (2) This  Agreement  constitutes a notice  pursuant to Section
8(b)(5) of the Note Purchase  Agreement and  accordingly  the Holders agree that
they will not sell any securities  pursuant to the Prospectus  until the Company
gives the Holders  notice  that they may  thereafter  do so. The Company  hereby
confirms  that it will use its best  efforts  to make the  Prospectus  available
within five Business Days after the date hereof.

                  (3) During the period  beginning on the date hereof and ending
on the earlier to occur of (i)  effectiveness  of an  amendment  to the existing
Registration Statement or (ii) a good faith determination by the Company that no
such  amendment is required and the filing of the 8-K, or (iii) the date that is
30 days after the date of this  Agreement,  the Holders waive their rights under
Sections 4.1 and 4.2 of the Notes to require the Company to repurchase any Notes
by reason of clause (e) of the definition of Repurchase  Event or the occurrence
of a Registration Repurchase Event.

                  (4) Notwithstanding any inconsistent provision in Section 8 of
the Note Purchase Agreements, if the Company is required,  pursuant to Section 8
of the Note Purchase Agreements, to file an additional registration statement to
register  shares of Common Stock issuable upon conversion of the Notes following
the  Stockholder  Approval,  it will do so within 15 days  after  obtaining  the
Stockholder Approval. Notwithstanding any inconsistent provision in Section 8 of
the Note Purchase Agreements, the Company will use its best efforts to have such
Registration  Statement  declared  effective as soon as possible but in no event
later than 75 days after obtaining the Stockholder Approval. Such Registration

#370535

<PAGE>



     Statement  and the  related  prospectus  shall  otherwise  be  deemed to be
included in the terms "Registration Statement" and "Prospectus."

         (q) Each Holder represents and warrants that it has all requisite power
and  authority,  corporate  or  otherwise,  to execute,  deliver and perform its
obligations  under this  Agreement  and the other  agreements  executed  by such
Holder in connection  herewith and to consummate the  transactions  contemplated
hereby and thereby;  and this  Agreement  has been duly and validly  authorized,
duly  executed and  delivered by such Holder and,  assuming  due  execution  and
delivery  by the  Company,  is a valid  and  binding  agreement  of such  Holder
enforceable in accordance with its terms,  except as the  enforceability  hereof
may be limited by bankruptcy, insolvency, reorganization, moratorium, fraudulent
conveyance  or other  similar  laws now or  hereafter  in effect  relating to or
affecting   creditors'  rights  generally  and  general  principles  of  equity,
regardless of whether  enforcement is considered in a proceeding in equity or at
law.

         (r)      The Company represents and warrants to the Holders that:

                  (1) The Common  Stock is listed for  trading on Nasdaq and (1)
the Company and the Common  Stock meet the criteria  for  continued  listing and
trading on Nasdaq;  (2) the Company has not been notified  since January 1, 1995
by the  NASD of any  failure  or  potential  failure  to meet the  criteria  for
continued  listing and trading on Nasdaq and (3) no suspension of trading in the
Common  Stock is in effect.  The Company  knows of no reason why the Shares will
not be eligible for listing on Nasdaq.

                  (2) This  Agreement  has been duly  authorized,  executed  and
delivered  by the  Company  and,  assuming  due  execution  and  delivery by the
Holders,  this  Agreement  is a valid  and  binding  obligation  of the  Company
enforceable in accordance with its terms,  except as the enforceability  thereof
may be limited by bankruptcy, insolvency, reorganization, moratorium, fraudulent
conveyance  or other  similar  laws now or  hereafter  in effect  relating to or
affecting   creditors'  rights  generally  and  general  principles  of  equity,
regardless of whether  enforcement is considered in a proceeding in equity or at
law.


                  (3) The  execution  and  delivery  of this  Agreement  and the
consummation by the Company of the transactions  contemplated  hereby do not and
will not,  with or without  the giving of notice or the lapse of time,  or both,
(i) result in any violation of any term of the certificate of  incorporation  or
by-laws of the Company or any of its Subsidiaries,  (ii) conflict with or result
in a breach by the  Company  or any of its  Subsidiaries  of any of the terms or
provisions of, or constitute a default under, or result in the  modification of,
or result in the creation or imposition of any lien,  security interest,  charge
or encumbrance upon any of the properties or assets of the Company or any of its
Subsidiaries  pursuant  to,  any  indenture,  mortgage,  deed of  trust or other
agreement or  instrument  to which the Company or any of its  Subsidiaries  is a
party  or by  which  the  Company  or any of its  Subsidiaries  or any of  their
respective  properties  or assets  are bound or  affected  or (iii)  violate  or
contravene  any  applicable  law, rule or regulation or any  applicable  decree,
judgment or order of any court,

#370535

<PAGE>



United States federal or state regulatory body,  administrative  agency or other
governmental   body  having   jurisdiction  over  the  Company  or  any  of  its
Subsidiaries  or any of their  respective  properties or assets or (iv) have any
material adverse effect on any permit,  certification,  registration,  approval,
consent,  license  or  franchise  necessary  for  the  Company  or  any  of  its
Subsidiaries to own or lease and operate any of their respective  properties and
to conduct any of their  respective  businesses or the ability of the Company or
any of the Subsidiaries to make use thereof.

                  (4) No authorization,  approval or consent of, or filing with,
any court, governmental body, regulatory agency,  self-regulatory  organization,
or stock exchange or market or the stockholders of the Company is required to be
obtained or made by the Company or any of its  Subsidiaries  in connection  with
the  execution,  delivery  and  performance  of this  Agreement,  other than (1)
listing of the additional  Shares on Nasdaq,  (2)  registration of the resale of
the  Shares  under  the 1933 Act as  contemplated  by  Section  8, (3) as may be
required under applicable state securities or "blue sky" laws.

                  (5) Once the  Stockholder  Approval  has been  obtained  and a
certificate of amendment to the Company's  certificate of incorporation has been
filed to  increase  the  number  of  authorized  shares  of  Common  Stock,  the
additional  shares of Common Stock issuable upon conversion of the Notes will be
duly authorized and, upon issuance upon conversion of the Notes, will be validly
issued and fully paid and non-assessable.

         (s) Prior to transferring  any Notes, and in addition to the provisions
in Section 8.7 of the Notes, a Holder shall provide the  transferee  with a copy
of this Agreement and such transferee  shall agree in writing to be bound by the
terms hereof.  The Company agrees to be bound by the terms of this Agreement for
the benefit of each such transferee.

         (t) The parties  hereto agree that the condition set forth on the first
signature page hereto has been satisfied.

                                                * * * * *
         This Amendment Agreement is conditioned upon the amendment of the terms
of the Company's  Series C Convertible  Preferred  Stock,  substantially  on the
terms set forth on Exhibit A to the Agreement in Principle,  dated as of January
6, 1998 by and between the Company and Advantage Fund II, Ltd.

                                                    DELTA OPPORTUNITY FUND, LTD.

                                                    By:      \s\


                                                    NELSON PARTNERS

                                                    By:      \s\


#370535

<PAGE>



                                                     OLYMPUS SECURITIES, LTD.


                                                              By:      \s\


                                                     OMICRON PARTNERS, L.P.


                                                              By:      \s\


                                                     OTATO L.P.


                                                              By:      \s\


                                                     DIAZ & ALTSCHUL GROUP, LLC


                                                              By:      \s\

Acknowledged and agreed:

NAPRO BIOTHERAPEUTICS, INC.


         By:      \s\ Gordon H. Link, Jr.

Date:   1/28/98


#370535

<PAGE>





Exhibit 4.2


                                January 28, 1998



NaPro BioTherapeutics, Inc.
Unit A
6304 Spine Road
Boulder, Colorado  80301

Attn:  Vice President and Chief Financial Officer

Gentlemen:

         Reference is made to (i) the Subscription  Agreement (the "Subscription
Agreement")  dated as of December 8, 1997 by and between NaPro  BioTherapeutics,
Inc., a Delaware corporation (the "Company" or the "Corporation"), and Advantage
Fund II, Ltd. (the  "Holder");  (ii) the Certificate of Designations of Series C
Senior Convertible  Preferred Stock (the  "Certificate");  and (iii) warrants to
purchase  175,000  shares of common stock of the  Company,  issued to the Holder
(the  "Warrants").  Capitalized terms used herein and not defined shall have the
meanings assigned to them in the Subscription Agreement and the Certificate.

         The Holder and the Company agree as follows:

         (a) (1) The Company  agrees to hold an annual  meeting of  stockholders
(the "Annual  Meeting") no later than June 1, 1998. Prior to the Annual Meeting,
the Board of Directors of the Company shall recommend to the  stockholders  that
they (i) approve an  amendment to the  Company's  Certificate  of  Incorporation
which shall increase the authorized  Common Stock to 30,000,000  shares and (ii)
effect the  Stockholder  Approval.  The Board of  Directors  of the Company will
solicit proxies to vote the  outstanding  shares of Common Stock in favor of the
actions specified in clauses (i) and (ii) of the immediately  preceding sentence
and the Company shall  otherwise use its best efforts to obtain approval of such
actions by the holders of the outstanding Common Stock. If the stockholders take
the action  specified  in clause (i) and fail to take the actions  specified  in
clause (ii) of the first  sentence of this  paragraph (a), the Company shall use
its best efforts to obtain a waiver by Nasdaq of the Stockholder  Approval.  The
Company  may cease  taking  further  steps to fulfill the  requirements  of this
paragraph  (a) if at any time  prior  to  performance  in full of the  Company's
obligations  under this paragraph  (a)(1) no shares of Series C Preferred  Stock
are  outstanding  or the Company shall have redeemed all  outstanding  shares of
Series C Preferred  Stock pursuant to Section 9(a) of the Certificate by payment
in full of the Redemption Price

#370535

<PAGE>



thereof after giving a Redemption  Notice  therefor in  accordance  with Section
9(a) of the Certificate.

                  (2) If the stockholders  fail to take the actions specified in
clauses (i) and (ii) of the first sentence of paragraph  (a)(1),  so long as the
Company is in compliance in all material  respects with its  obligations  to the
Holder,  then on June 1, 1998,  this Agreement  shall terminate and the terms of
the Series C Preferred  Stock and Warrants  shall be those in effect on the date
hereof without giving effect to the amendments contained herein, except that the
terms of the proviso in the definition of "Conversion Price", as amended hereby,
and Section (k) hereof shall remain in effect.

         (b) So long as the Company is in  compliance  in all material  respects
with its  obligations to the holders of the shares of Series C Preferred  Stock,
including,  without  limitation,  the  obligations  of  the  Company  under  the
Transaction  Documents and this  Agreement,  during the period  beginning on the
date hereof and ending December 31, 1998, the Holder hereby waives its rights to
require the  Company to redeem any shares of Series C  Preferred  Stock due to a
Maximum Share Amount Inconvertibility, including any rights to receive notice.

         (c) The Company  hereby agrees that, at any time after the date hereof,
the Holder may exchange  shares of Series C Preferred Stock for shares of Common
Stock in lieu of converting  such shares in accordance  with the Certificate and
the Holder hereby agrees that it will not convert any shares in accordance  with
the Certificate so long as the Company is in compliance in all material respects
with its  obligations to the holders of the shares of Series C Preferred  Stock,
including,  without  limitation,  the  obligations  of  the  Company  under  the
Transaction  Documents and this Agreement.  The terms and conditions pursuant to
which shares of Series C Preferred  Stock may be exchanged  for shares of Common
Stock shall in all  respects be  identical  to the terms  pursuant to which such
shares may be converted  under the  Certificate and the provisions of Section 10
of the  Certificate are hereby  incorporated  herein by this reference as if set
forth in full herein, except as set forth below:

                  (1) each  reference  in the  Certificate  to  "conversion"  or
"convert" or other forms of such words  (including in the definitions  contained
therein) shall be deemed to be a reference to "exchange" or the appropriate form
of such word.

     (2)  Section 10 of the  Certificate  shall be deemed to have a new  Section
10(c), which shall read as follows:

     "(c) Limitation on Conversion Under Certain Circumstances.

                                    (i)   Notwithstanding  any  other  provision
                           herein (A) a holder of Series C Preferred Stock shall
                           have no right  to  convert  any  shares  of  Series C
                           Preferred  Stock (and  accrued  and unpaid  dividends
                           thereon)  if  such  conversion  would  result  in the
                           aggregate  number of shares  of Common  Stock  issued
                           hereunder during the period

#370535

<PAGE>



                           beginning on the Issuance Date and ending on December
                           31, 1998 (whether through conversion or in payment of
                           dividends or otherwise) exceeding 2,300,000,  and (B)
                           during  the period  beginning  on January 1, 1998 and
                           ending on December  31,  1998,  a holder of shares of
                           Series C  Preferred  Stock  shall not be  entitled to
                           convert  shares  of  Series  C  Preferred  Stock at a
                           Conversion  Price  that is less  than  $4.00  if such
                           conversion  would result in the  aggregate  number of
                           shares  of Common  Stock  issued  hereunder  (whether
                           through  conversion  or in  payment of  dividends  or
                           otherwise) at a Conversion  Price (or Computed Price,
                           in the case of shares  issued as  dividends)  of less
                           than $4.00 during the calendar  month of the proposed
                           conversion  for which the  determination  under  this
                           clause (B) is being made exceeding  150,000 shares of
                           Common Stock.  The Conversion Price set forth in this
                           Section  10(c)(1)  shall be subject to  adjustment on
                           the same basis set forth in the parenthetical  phrase
                           in  clause  (1)  of  the   definition   of  the  term
                           Conversion   Price  (as  in  effect   prior  to  this
                           Agreement)  for any  such  events  which  occur on or
                           after the effective date of this Agreement.

                                    (ii)  Notwithstanding  any  other  provision
                           herein, until the Stockholder Approval is obtained, a
                           holder  of Series C  Preferred  Stock  shall  have no
                           right to  convert  any  shares of Series C  Preferred
                           Stock (and accrued and unpaid  dividends  thereon) if
                           such conversion  would result in the aggregate number
                           of shares of Common Stock issued  hereunder  (whether
                           through  conversion  or in  payment of  dividends  or
                           otherwise) exceeding 1,250,000.

                                    (iii)  The  provisions   contained  in  this
                           Section 10(c) shall be of no further force and effect
                           if (i) the Company is  acquired by another  person by
                           means of any  merger,  consolidation,  sale or all or
                           substantially  all  assets  of  the  Company,   share
                           exchange  or  other  business  combination  (each,  a
                           "Transaction"),  (ii)  the  Company  enters  into any
                           Transaction  where the  shareholders  of the  Company
                           immediately   prior  to  such   Transaction   do  not
                           collectively  own at  least  51%  of the  outstanding
                           voting  securities  of the surviving  corporation  of
                           such   Transaction    immediately    following   such
                           Transaction,   (iii)  the  Company  enters  into  any
                           agreement  for any  such  Transaction,  (iv) a Tender
                           Offer  is  consummated   for  at  least  51%  of  the
                           outstanding shares of Common Stock or (v) the Company
                           fails to  comply  in any  material  respect  with its
                           obligations  to any  holder  of  shares  of  Series C
                           Preferred Stock, including,  without limitation,  its
                           obligations  arising under or in connection with this
                           Certificate   of   Designations,   the   Subscription
                           Agreement, the Transfer Instruction, the Warrants (as
                           defined  in the  Subscription  Agreement)  and of the
                           letter

#370535

<PAGE>



     agreement,  dated as of January 6, 1998,  by and  between  the  Company and
Advantage Fund II, Ltd."


                  (3) The definition of Conversion  Price in Section 1(b) of the
Certificate of Designations shall be deemed to read as follows:

                           "Conversion  Price" for any Conversion Date means 95%
                           of the lowest  Two-Day  Average  Trading Price during
                           the Measurement Period for the applicable  Conversion
                           Date; provided,  however,  that (i) on any date on or
                           after  March 1, 1998 but prior to June 1,  1998,  the
                           Conversion  Price  shall not be greater  than 110% of
                           the  arithmetic  average of the Trading Prices of the
                           Common Stock for the period of 30 consecutive Trading
                           Days ending one  Trading  Days prior to March 1, 1998
                           (the  "March  Cap")  and (ii) on any date on or after
                           June 1,  1998,  the  Conversion  Price  shall  not be
                           greater than the lesser of (A) 110% of the arithmetic
                           average of the Trading  Price of the Common Stock for
                           the period of thirty (30)  consecutive  Trading  Days
                           ending one  Trading Day prior to June 1, 1998 and (B)
                           the March  Cap  (subject,  in the case of the  amount
                           determined  in  accordance  with  this  proviso,   to
                           equitable  adjustments  from  time to  time on  terms
                           reasonably  acceptable  to the  Corporation  and  the
                           Majority  Holders  for (1)  stock  splits,  (2) stock
                           dividends,    (3)    combinations,     (4)    capital
                           reorganizations (5) issuance to all holders of Common
                           Stock rights or warrants to purchase shares of Common
                           Stock, (6) the distribution by the Corporation to all
                           holders of Common Stock of evidences of  indebtedness
                           of  the  Corporation  or  cash  (other  than  regular
                           quarterly cash  dividends),  (7) Tender Offers by the
                           Corporation   or  any   Subsidiary   for,   or  other
                           repurchases of shares of, Common Stock in one or more
                           transactions which, individually or in the aggregate,
                           result in the  purchase  of more than ten  percent of
                           the Common Stock  outstanding  and (8) similar events
                           relating to the Common Stock, in each such case which
                           occur,  or with respect to which "ex-" trading of the
                           Common Stock begins, on or after March 1, 1998 and on
                           or before the  applicable  Conversion  Date,  in each
                           case on a basis  consistent  with the adjustments set
                           forth  in  the  definition  of  Trading  Price);  and
                           provided  further,  however,  that  if an  Adjustment
                           Event occurs,  then the Conversion Price in effect on
                           any date  after such  Adjustment  Event  occurs  (and
                           whether or not such Adjustment Event continues) shall
                           be  adjusted  to each  date on which  the  Conversion
                           Price is being determined as follows: (x) in the case
                           of the  Conversion  Price provided in the main clause
                           of this definition,  the percentage used in computing
                           such Conversion Price shall be reduced at the rate of
                           2.5  percentage  points  for each 30 days  that  such
                           Adjustment  Event continues (pro rated for any period
                           of less than 30

#370535

<PAGE>



                           days)  and (y) in the  case of the  Conversion  Price
                           provided in the first proviso to this definition, the
                           Conversion Price  determined in accordance  therewith
                           shall  be  reduced  at  the  rate  of  2.5%  of  such
                           Conversion Price (computed on the basis of the amount
                           such  Conversion  Price  would  otherwise  be without
                           regard to any  adjustment  therein  pursuant  to this
                           clause  (y)) for  each 30 days on or  after  March 1,
                           1998 that such Adjustment  Event continues (pro rated
                           for any period of less than 30 days).

         (d) The parties  agree that they shall have the rights and  obligations
set forth below as if Section 7 of the Certificate had been amended to add a new
Section 7(a)(8), which shall read as follows:

                           "(8)  If  at  any  time  following  the   Stockholder
                  Approval,  the  Company  or the  holder  of shares of Series C
                  Preferred  Stock  becomes  aware of any facts that would cause
                  any  outstanding  shares  of  Series C  Preferred  Stock to be
                  inconvertible,    other   than   a   Maximum    Share   Amount
                  Inconvertibility     or     a     Registration     Restriction
                  Inconvertibility,  such person  shall  promptly  give  written
                  notice of such facts to the other  person.  Within 10 Business
                  Days after receipt of such notice by the receiving  person, if
                  the  parties  agree that such  inconvertibility  exists,  such
                  holder shall have the right by a Redemption  Election given to
                  the  Corporation  to direct  the  Corporation  to  redeem  the
                  portion  of such  holder's  outstanding  shares  of  Series  C
                  Preferred  Stock (which,  if applicable,  shall be all of such
                  holder's  outstanding  shares of Series C Preferred  Stock) as
                  shall  not,  on the  Business  Day  prior  to the date of such
                  redemption,  be  convertible  into  shares of Common  Stock by
                  reason other than a Maximum Share Amount  Inconvertibility  or
                  Registration  Restriction  Inconvertibility,  at a  price  per
                  share equal to the Share  Limitation  Redemption  Price.  Such
                  Share  Limitation  Redemption  Price  shall be  payable by the
                  Company in four equal monthly  installments  and the shares of
                  Series C Preferred Stock held by such holder shall be redeemed
                  in four equal  installments  as such  payments are made. If at
                  any  time  subsequent  to a  determination  pursuant  to  this
                  Section  7(a)(8)  of the  number  of  inconvertible  shares of
                  Series C Preferred Stock any such inconvertibility shall occur
                  with respect to additional  shares of Series C Preferred Stock
                  held by such holders,  the provisions of this Section  7(a)(8)
                  shall be  applicable  successively  to each  instance  of such
                  inconvertibility."

         (e) The parties agree that they will not enforce their rights contained
in  Section  9(a)(2) of the  Certificate  and will  instead  have the rights and
obligations  set forth below as if Section  9(a)(2) of the  Certificate had been
amended to read as follows:
                           (2)  The  Company  shall  not be  entitled  to give a
                  Redemption  Notice  or  to  redeem  any  shares  of  Series  C
                  Preferred  Stock  with  respect  to which a holder has given a
                  Conversion Notice.  Notwithstanding the giving of a Redemption
                  Notice, each holder of shares of Series C Preferred Stock

#370535

<PAGE>



                  shall be entitled  to convert in  accordance  with  Section 10
                  such  shares of Series C  Preferred  Stock held by such holder
                  which are  otherwise  to be redeemed in  accordance  with such
                  Redemption  Notice  and would  convert  into  shares of Common
                  Stock  sufficient  to cover  open and short  positions  in the
                  Common Stock held by such holder on the date of the Redemption
                  Notice by giving a Conversion  Notice at any time prior to the
                  later of (1) the date  that is one  Business  Day prior to the
                  Redemption Date and (2) the date on which the Corporation pays
                  the Redemption Price of such shares to such holder;  provided,
                  however,  that  if the  Company  defaults  in  payment  of the
                  Redemption  Price, such holder shall thereafter be entitled to
                  convert  all of such  holder's  shares of  Series C  Preferred
                  Stock.

         (f) The  definitions of  "Redemption  Date" and  "Redemption  Price" in
Section 1(b) of the Certificate shall be deemed to read as follows:

                  "Redemption Date" means, as applicable, a 1998 Redemption Date
                  or a Subsequent Redemption Date.

                  "Redemption  Price" means, as applicable,  the 1998 Redemption
                  Price or the Subsequent  Redemption Price. The 1998 Redemption
                  Price  shall be  payable on any 1998  Redemption  Date and the
                  Subsequent Redemption Price shall be payable on any Subsequent
                  Redemption Date.

     (g) The following  definitions  shall be deemed to be added to Section 1(b)
of the Certificate in the appropriate alphabetical order:

                  "1998 Redemption Date" means each date on or prior to December
                  31, 1998 on which the Corporation is required to redeem shares
                  of Series C Preferred  Stock by reason of the  exercise of its
                  option to do so in accordance with Section 9(a).

                  "1998  Redemption  Price" means an amount in cash equal to the
                  sum of (a) the product  obtained by multiplying (i) the sum of
                  (A) $1,000 plus (B( an amount  equal to the accrued but unpaid
                  dividends  on the  share  of  Series C  Preferred  Stock to be
                  redeemed to the date of payment of the Redemption  Price times
                  (ii) 130%  plus (b) an  amount  equal to  accrued  and  unpaid
                  Arrearage  Interest on  dividends  in arrears on such share of
                  Series  C  Preferred  Stock  (determined  in  accordance  with
                  Section 5(a)) to the Redemption Date.

                  "Subsequent  Redemption  Date"  means each date  beginning  on
                  January 1, 1999 on which the Corporation is required to redeem
                  shares of Series C Preferred  Stock by reason of the  exercise
                  of its option to do so in accordance with Section 9(a).


#370535

<PAGE>



                  "Subsequent Redemption Price" means an amount in cash equal to
                  the sum of (a) the product obtained by multiplying (i) the sum
                  of (A)  $1,000  plus (B) an amount  equal to the  accrued  but
                  unpaid  dividends on the share of Series C Preferred  Stock to
                  be  redeemed  to the date of payment of the  Redemption  Price
                  times (ii) 110% plus (b) an amount equal to accrued and unpaid
                  Arrearage  Interest on  dividends  in arrears on such share of
                  Series  C  Preferred  Stock  (determined  in  accordance  with
                  Section 5(a)) to the Redemption Price.

         (h) On and after  the date  hereof,  so long as  paragraph  (c)  hereof
remains in effect,  the Company shall treat any request for conversion of Series
C  Preferred  Stock  submitted  by a holder  in  accordance  with the  terms and
conditions of the  Certificate  as a request or exchange in accordance  with the
terms and conditions hereof.

         (i) Within 10 Business Days after the date hereof, the Company will (1)
execute and deliver the Transfer Agent  Instructions  in a form to be agreed and
thereby  irrevocably  instruct  American  Stock  Transfer  & Trust  Company,  as
Transfer Agent and Registrar (the "Transfer  Agent"),  to issue certificates for
the Common  Stock  from time to time upon  exchange  of the  Series C  Preferred
Shares in such amounts as specified  from time to time to the Transfer  Agent in
the Conversion  Notices  surrendered  in connection  with such exchanges and (2)
appoint the Transfer Agent the exchange agent for the Series C Preferred  Stock.
The  certificates  for the Common  Shares shall be registered in the name of the
Buyer or its nominee and in such  denominations  to be specified by the Buyer in
connection with each exchange of Series C Preferred Shares. The Company warrants
that no instruction other than such instructions referred to in this Section (i)
will be given by the  Company to the  Transfer  Agent and that the Common  Stock
shall  otherwise be freely  transferable on the books and records of the Company
as and to the extent  provided in this  Agreement.  Nothing in this  Section (i)
shall limit in any way the Holders' obligations and agreement to comply with the
registration  requirements of all applicable  securities laws upon any resale of
Common Stock by the Holder.  If the Holder  provides the Company with an opinion
of counsel  reasonably  satisfactory in form, scope and substance to the Company
that  registration  of a resale by the Holder of any of the Common  Stock by the
Holder of any of the  Common  Stock is not  required  under  the 1933  Act,  the
Company shall permit the transfer of such Common Stock and promptly instruct the
Company's  transfer  agent to issue upon transfer no later than three days after
receipt of such opinion one or more share  certificates in such name and in such
denominations as specified by the Holder.

         (j) Any notice of exchange  of shares of Series C Preferred  Stock by a
Holder pursuant hereto shall be in the form of the Conversion Notice included in
the Certificate.

     (k) The  definition  of  "Purchase  Price" in the  Warrants  is  amended by
deleting "$10.00" and replacing it with "$2.50."

         (l) (1) Within five Business Days of the date hereof, the Company shall
(i) file a Current  Report on Form 8-K  describing  the terms of this  Amendment
Agreement (the "8-K") and (ii) make a good faith determination  within five days
after execution of this

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Agreement of whether,  pursuant to Section 8 of the Subscription Agreement,  the
Company is required to file an additional Registration Statement or to amend the
existing  Registration  Statement  and  notify  the  Holder in  writing  of such
determination.  Notwithstanding  Section 8(a) of the Subscription  Agreement, if
the Company so determines that such a filing is required, the Company shall file
such  Registration  Statement  within  15 days  after  the date  hereof  or such
amendment within five Business Days after the date hereof.

                  (2) This  Agreement  constitutes a notice  pursuant to Section
8(b)(5) of the Subscription  Agreement and accordingly the Holder agrees that it
will not sell any securities  pursuant to the Prospectus until the Company gives
the Holder notice that it may thereafter do so. The Company hereby confirms that
it will use its  best  efforts  to make the  Prospectus  available  within  five
Business Days after the date hereof.

                  (3) During the period  beginning on the date hereof and ending
on the  earliest to occur of (i)  effectiveness  of an amendment to the existing
Registration Statement or (ii) a good faith determination by the Company that no
such amendment is required and the filing of the 8-K, or (iii) the date which is
30 days after the date of this Agreement, the Holder (A) waives its rights under
Section 11 of the  Certificate  to require  the  Company to redeem any shares of
Preferred Stock by reason of clause (5) of the definition of Optional Redemption
Event and (B) agrees that no  Adjustment  Event shall be deemed to have occurred
with respect to the Registration Statement.

                  (4)   Notwithstanding   Section   8(a)  of  the   Subscription
Agreement, if the Company is required, pursuant to Section 8 of the Subscription
Agreement,  to file an additional  Registration  Statement to register shares of
Common Stock issuable upon  conversion of the Series C Preferred Stock following
the  Stockholder  Approval,  it will do so within 15 days  after  obtaining  the
Stockholder Approval. Notwithstanding any inconsistent provision in Section 8 of
the Subscription  Agreement,  the Company will use its best efforts to have such
Registration  Statement  declared  effective as soon as possible but in no event
later than 75 days after obtaining the Stockholder  Approval.  Such Registration
Statement and the related prospectus shall otherwise be deemed to be included in
the terms ARegistration Statement@ and AProspectus.@ During the period beginning
on the date on which the  Stockholder  Approval  is  effected  and ending on the
earlier to occur of (i) effectiveness of such additional  Registration Statement
or (ii) the  date  that is 75 days  after  the  date on  which  the  Stockholder
Approval is effected, the Holder agrees that no Adjustment Event shall be deemed
to have occurred with respect to the Registration Statement.

         (m) Prior to  transferring  any shares of Preferred  Stock,  the Holder
shall provide the transferee  with a copy of this Agreement and such  transferee
shall agree in writing to be bound by the terms hereof. The Company agrees to be
bound by the terms of this Agreement for the benefit of each such transferee.

     (n) The Holder  represents and warrants that it has all requisite power and
authority,   corporate  or  otherwise,  to  execute,  deliver  and  perform  its
obligations under this

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Agreement  and the  Transaction  Documents and to  consummate  the  transactions
contemplated  hereby and thereby;  and this Agreement has been duly  authorized,
executed and  delivered on behalf of the Holder and,  assuming due execution and
delivery  by the  Company,  is a  valid  and  binding  agreement  of the  Holder
enforceable in accordance with its terms,  except as the  enforceability  hereof
may be limited by bankruptcy,  insolvency,  reorganization,  moratorium or other
similar  laws now or hereafter  in effect  relating to or  affecting  creditors'
rights  generally  and  general  principles  of  equity,  regardless  of whether
enforcement is considered in a proceeding in equity or at law.

         (o)      The Company represents and warrants to the Holder that:

                  (1) The Company has duly reserved  1,250,000  shares of Common
Stock as the Conversion Shares and 175,000 shares of Common Stock as the Warrant
Shares, and such shares shall remain so reserved (subject to reduction from time
to time for shares of Common Stock issued upon  conversion  of Preferred  Shares
and exercise of the  Warrant),  and the Company  shall from time to time reserve
such  additional  shares of Common  Stock as shall be  required  to be  reserved
pursuant to the Certificate of Designations, as long as the Preferred Shares are
convertible,  and  pursuant  to  the  Warrants,  so  long  as the  Warrants  are
exercisable.  The  Common  Stock is listed  for  trading  on Nasdaq  and (1) the
Company and the Common Stock meet the criteria for continued listing and trading
on Nasdaq;  (2) the Company has not been  notified  since January 1, 1995 by the
NASD of any failure or  potential  failure to meet the  criteria  for  continued
listing  and  trading on Nasdaq and (3) no  suspension  of trading in the Common
Stock is in effect.  The Company  knows of no reason that the Common Shares will
not be eligible for listing on Nasdaq.

                  (2) This  Agreement  has been duly  authorized,  executed  and
delivered on behalf of the Company and this Agreement is, assuming due execution
by the Holder, is a valid and binding  obligation of the Company  enforceable in
accordance with its terms, except as the enforceability hereof may be limited by
bankruptcy, insolvency, reorganization,  moratorium or other similar laws now or
hereafter in effect  relating to or affecting  creditors'  rights  generally and
general principles of equity, regardless of whether endorsement is considered in
a proceeding in equity or at law.

                  (3) The  execution  and  delivery  of this  Agreement  and the
consummation by the Company of the transactions  contemplated by do not and will
not,  with or without  the giving of notice or the lapse of time,  or both,  (i)
result in any  violation  of any term of the  certificate  of  incorporation  or
by-laws of the  Company or any  Subsidiary,  (ii)  conflict  with or result in a
breach by the Company or any Subsidiary of any of the terms or provisions of, or
constitute a default under, or result in the  modification  of, or result in the
creation or imposition of any lien,  security  interest,  charge or  encumbrance
upon any of the properties or assets of the Company or any  Subsidiary  pursuant
to, any indenture,  mortgage,  deed of trust or other agreement or instrument to
which the  Company or any  Subsidiary  is a party or by which the Company or any
Subsidiary  or any of  their  respective  properties  or  assets  are  bound  or
affected,  (iii) violate or contravene any applicable law, rule or regulation or
any applicable decree,  judgment or order of any court, United States federal or
state regulatory

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body,  administrative agency or other governmental body having jurisdiction over
the Company or any Subsidiary or any of their respective properties or assets or
(iv)  have  any   material   adverse   effect  on  any  permit,   certification,
registration,  approval, consent, license or franchise necessary for the Company
or any Subsidiary to own or lease and operate any of their respective properties
and to conduct any of their respective  businesses or the ability of the Company
or any Subsidiary to make use thereof.

                  (4) No  authorization,  approval  or  consent  of  any  court,
governmental body,  regulatory agency,  self-regulatory  organization,  or stock
exchange or market or the stockholders of the Company is required to be obtained
by the Company or any Subsidiary for (1) the execution, delivery and performance
by the Company of this Agreement,  (2) the issuance and sale of shares of Common
Shares upon  conversion of, or in payment of dividends on, the Preferred  Shares
and upon exercise of the Warrants as  contemplated  by the  Certificate  and the
Warrants, (3) the issuance of Redemption Price Notes pursuant to the Certificate
and (4) the  performance  by the  Company  of its  other  obligations  under the
Transaction Documents, other than (1) listing of the additional Common Shares on
Nasdaq,  (2)  registration of the resale of the Common Shares under the 1993 Act
as  contemplated  by Section 8, (3) as may be required  under  applicable  state
securities or "blue sky" laws.

                  (5) Once the  Stockholder  Approval  has been  obtained  and a
certificate of amendment to the Company's  certificate of incorporation has been
filed to  increase  the  number  of  authorized  shares  of  Common  Stock,  the
additional  shares of Common Stock  issuable upon  conversion or exchange of the
shares of Series C Preferred  Stock will be duly  authorized  and, upon issuance
upon conversion or exchange of the shares of Series C Preferred  Stock,  will be
validly issued and fully paid and non-assessable.

     (p) The parties  hereto agree that the condition set forth on the signature
page hereto has been satisfied.

                                                * * * * *
         This Amendment Agreement is conditioned upon the amendment of the terms
of at least 80% of the outstanding  principal  amount of the Company's 5% Senior
Convertible  Notes  due June 4,  2000,  substantially  on the terms set forth on
Exhibit A to the  Agreement  in  Principle,  dated as of  January 6, 1998 by and
among the Company and holders named therein.
                                                     ADVANTAGE FUND II, LTD.

                                                              By:      /s/

Acknowledged and agreed:
NAPRO BIOTHERAPEUTICS, INC.

         By:       /s/ Gordon H. Link, Jr.

Date:1/28/98



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Exhibit 4.3


                    AMENDMENT NO. 2 TO AGREEMENT IN PRINCIPLE


         THIS AMENDMENT NO. 2 TO AGREEMENT IN PRINCIPLE, dated as of January 27,
1998 (this "Amendment"), by and between NAPRO BIOTHERAPEUTICS,  INC., a Delaware
corporation (the "Company"), and the undersigned holder (the "Holder") of one of
the Company's Senior Convertible Notes due June 4, 2000 (the "Note").

         The Company and the Holder agree as follows:

     1. The Company  and the Holder  have  executed  and  delivered,  one to the
other,  an Agreement in  Principle,  dated as of January 6, 1998,  as amended by
Amendment  No.  1  thereto,   dated  January  16,  1998  (as  so  amended,   the
"'Agreement").

     2. The Agreement is hereby amended to change the per share dollar amount in
Section 2 of the Agreement from $3.75 to $3.00.

     3.  Except as  modified  hereby,  the  Agreement  remains in full force and
effect in accordance with its terms.

         4. This Amendment shall be governed by and construed in accordance with
the  laws of the  State  of New  York  applicable  to  contracts  to be made and
performed entirely in the State of New York.

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed by their  officers or other  representatives  as of the date first
set forth above.


                                                NAPRO BIOTHERAPEUTICS, INC.



                                                By:      /s/ Gordon H. Link, Jr.
                                                       Name: Gordon H. Link, Jr.
                                                       Title:  Vice President

                                                OMICRON PARTNERS, L.P.

                                                By:      /s/
                                                Name:
                                                Title:

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