SUNPHARM CORPORATION
10KSB, 1998-03-31
PHARMACEUTICAL PREPARATIONS
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                      ------------------------------------

                                   FORM 10-KSB
         (Mark One)

         [X]      ANNUAL REPORT UNDER SECTION 13 OR 15(D) OF
                  THE SECURITIES EXCHANGE ACT OF 1934
                       For the fiscal year ended December 31, 1997
                                       OR

         [ ]      TRANSITION REPORT UNDER SECTION 13 OR 15(D) OF
                  THE SECURITIES EXCHANGE ACT OF 1934
                       For the transition period from __________ to __________
                         Commission File Number 0-27578

                              SUNPHARM CORPORATION
                 (Name of small business issuer in its charter)

                  Delaware                                      F593097048
       (State or other jurisdiction of                       (I.R.S. Employer
       incorporation or organization)                       Identification No.)

       4651 Salisbury Road, Suite 205                              32256
            Jacksonville, Florida                               (Zip Code)
  (Address of principal executive offices)

                                 (904) 296-3320
                           (Issuer's telephone number)
                      ------------------------------------
            Securities registered under Section 12(b) of the Exchange
             Act: None Securities registered under Section 12(g) of
                                the Exchange Act:
                                 Title of Class
                    Common Stock, par value $.0001 per share
                    Redeemable Common Stock Purchase Warrants
 Units consisting of Common Stock and Redeemable Common Stock Purchase Warrants

         Check whether the Issuer (1) filed all reports  required to be filed by
Section 13 or 15(d) of the  Exchange  Act during the past 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 : No 9

         Check if there is no  disclosure  of  delinquent  filers in response to
Item 405 of  Regulation  S-B contained in this form,  and no disclosure  will be
contained,  to the  best of the  Issuer's  knowledge,  in  definitive  proxy  or
information statements incorporated by reference in Part III of this Form 10-KSB
or any amendment to this Form 10-KSB. 9

         The Issuer's revenues for its most recent fiscal year: $0.

         The aggregate  market value of the voting stock held by  non-affiliates
of the Issuer on March 20,  1998 was  $22,229,340,  based on the  closing  sales
price of the  issuer's  common stock on the Nasdaq Small Cap Market on such date
of $5.25 per share. For purposes of the preceding  sentence only, all directors,
executive  officers and  beneficial  owners of ten percent or more of the common
stock are assumed to be affiliates.  As of March 20, 1998,  5,740,828  shares of
the Issuer's common stock were outstanding.

         DOCUMENTS  INCORPORATED BY REFERENCE:  Certain sections of the Issuer's
definitive  proxy  statement  relating to the  Issuer's  1998 annual  meeting of
stockholders,  which proxy statement will be filed under the Securities Exchange
Act of 1934, as amended,  within 120 days of the end of the Issuer's fiscal year
ended  December 31, 1997,  are  incorporated  by reference into Part III of this
Form 10-KSB.

  Transitional Small Business Disclosure Format (check one): Yes [X]; No [ ] :

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

<PAGE>
                                     PART I

         WHEN  USED  IN  THIS  DOCUMENT,  THE  WORDS  "ANTICIPATES,"  "EXPECTS,"
"BELIEVES,"   "INTENDS"  AND  SIMILAR   EXPRESSIONS  ARE  INTENDED  TO  IDENTIFY
FORWARD-LOOKING  STATEMENTS.  SUCH  STATEMENTS  ARE  SUBJECT TO  CERTAIN  RISKS,
UNCERTAINTIES   AND   ASSUMPTIONS.   SHOULD  ONE  OR  MORE  OF  THESE  RISKS  OR
UNCERTAINTIES  MATERIALIZE,  OR SHOULD  UNDERLYING  ASSUMPTIONS PROVE INCORRECT,
ACTUAL RESULTS MAY VARY MATERIALLY FROM THOSE ANTICIPATED,  EXPECTED,  ESTIMATED
OR  PROJECTED.  FOR  ADDITIONAL  DISCUSSION  OF SUCH  RISKS,  UNCERTAINTIES  AND
ASSUMPTIONS, SEE "ITEM 1. DESCRIPTION OF BUSINESS-RISK FACTORS."

ITEM 1.  DESCRIPTION OF BUSINESS.

         SunPharm  Corporation  ("SunPharm"  or the  "Company") is a development
stage  company  engaged  in the  development  of small  molecule  pharmaceutical
products,   consisting  of  novel  polyamine  analogues  and  other  proprietary
compounds  invented  at the  University  of  Florida  and  licensed  exclusively
worldwide to the Company.  The Company's drug development efforts are focused on
cancer,  diarrhea associated with acquired  immunodeficiency  syndrome ("AIDS"),
other gastrointestinal disorders, and iron overload. The Company currently has 5
compounds  in  various   stages  of  research  or   development,   targeting  10
indications.

         Three  of the  Company's  polyamine  analogue  products  are  currently
undergoing  or  have  recently   completed  Phase  I  or  II  clinical   trials.
Diethylhomospermine  ("DEHOP") has recently  completed a Phase II clinical trial
for the treatment of refractory AIDS-related chronic diarrhea.  DEHOP is also in
a Phase I  clinical  trial for  cancer,  commenced  in  October  1996  under the
supervision  of the  University  of Wisconsin  through a federal  grant from the
National Cancer Institute. Another of the Company's products, diethylnorspermine
("DENSPM"),  has  completed  a Phase I  clinical  trial  for  the  treatment  of
refractory  solid  cancer.  The  Investigational  New Drug  ("IND")  application
relating to DENSPM has been  transferred  to the  Company's  strategic  alliance
partner, Warner-Lambert Company ("Warner-Lambert"), which has commenced Phase II
clinical trials for the treatment of various solid tumor cancers.

         The  Company  is  also  conducting  preclinical  studies  of its  other
potential  compounds and indications  through its sponsored  research  agreement
with the  University  of Florida and through  collaborations  with other leading
research institutions. In addition, the Company continues to investigate (i) the
possible use of DENSPM for the  treatment of skin  disorders  such as psoriasis,
(ii) the use of a derivative of DEHOP for the  treatment of certain  carcinomas,
and  (iii)   cyclic   analogues   of  these   compounds   for   their   possible
anti-inflammatory and cardiovascular effects.

         The Company's  strategy is to develop products both  independently  and
through strategic alliances,  pursuant to which the Company will seek financial,
preclinical   and  clinical   trial  and   marketing   assistance   from  larger
pharmaceutical companies for drugs with broad market potential,  while retaining
parallel  manufacturing  and/or  marketing  rights  for  all or  part  of  those
products.  Consistent  with this  strategy,  the Company  sublicensed  worldwide
rights  (excluding  Japan) to  manufacture  and  market  DENSPM  for all  cancer
applications to  Warner-Lambert in May 1993 and sublicensed such rights in Japan
to Nippon Kayaku Co., Ltd.  ("Nippon  Kayaku") in February 1994.  Warner-Lambert
and Nippon  Kayaku have agreed to make staged  payments to SunPharm  for license
fees and research  and  development  milestones,  of which an aggregate of $2.85
million  has been  paid to date,  and to pay  royalties  for  sales of  products
incorporating DENSPM. In addition,  Warner-Lambert and Nippon Kayaku have agreed
to fund and  administer all further  clinical  trials which may be conducted for
DENSPM.

         The  Company  was   incorporated   in  Delaware  in  1990  as  Lexigen,
Incorporated and in 1991 changed its name to SunPharm Corporation. The Company's
principal  executive  offices are  located at 4651  Salisbury  Road,  Suite 205,
Jacksonville,  Florida 32256. The Company's  telephone number is (904) 296-3320.
SunPharm supports a principal  research facility at the University of Florida in
Gainesville, Florida.

TECHNOLOGY OVERVIEW

         DEVELOPMENT OF THE COMPANY'S POLYAMINE ANALOGUE TECHNOLOGY

         For the past fifteen  years,  the inventor of the  Company's  polyamine
analogues,  Dr. Raymond Bergeron, has conducted research towards the development
of polyamine  analogues as potential  anti-cancer  agents at the  University  of
Florida.  This research has been supported by in excess of $6 million of funding
under National  Cooperative Drug Discovery Group grants from the National Cancer
Institute and, since 1992,  approximately $5 million of funding from the Company
through December 31, 1997.

<PAGE>

         CHARACTERISTICS AND FUNCTIONS OF POLYAMINES

         Human cells contain three essential,  naturally  occurring  polyamines:
putrescine,  spermidine  and  spermine.  In contrast to building  blocks such as
amino  acids,  nucleotides  and  sugars,  polyamines  do  not  incorporate  into
macromolecules,  but remain as  metabolically  distinct  entities  within cells.
Research  indicates that these  polyamines bind to nucleic acids and promote the
integrity  and  fidelity  of  many of  their  functions,  such  as  replication,
supercoiling,  ribonucleic acid ("RNA") transcription and processing and protein
synthesis.   These   functions  of   polyamines   are   necessary  for  cellular
proliferation to occur.

         Human cells employ a family of enzymes to maintain the proper  balance,
or equilibrium, of polyamines.  Included in this family of enzymes are ornithine
decarboxylase ("ODC") and S-adenosylmethionine  decarboxylase  ("SAMDC"),  which
make  or   synthesize   polyamines   for  the  cell,   and   spermidine/spermine
N1-acetyltransferase  ("SSAT"), which controls the export of polyamines from the
cell. All three of these enzymes are short-lived,  rapidly  inducible  proteins,
and are tightly  regulated by intracellular  polyamine pools.  Working together,
these  enzymes  function in a highly  coordinated  manner to maintain  polyamine
pools within a very narrow range of concentration inside the cell.

         The Company's polyamine analogue compounds are structurally  similar to
(hence,  "analogues" of) the cell's naturally occurring  polyamines.  Because of
this  similarity,  these  analogues are recognized as natural  polyamines by the
cell's  polyamine  uptake system and thus gain entry into the cell.  Once inside
the cell, the Company's polyamine analogues disrupt the cell's polyamine balance
and  biosynthetic  network,  causing  the cell to shut down the  enzymes ODC and
SAMDC that would normally make natural polyamines, and to increase production of
SSAT,  the enzyme which is  responsible  for the breakdown and export of natural
polyamines  from the cell. The combined  effect on the enzymes  controlling  the
proper level of polyamines in the cell results is a substantial reduction in the
amount of polyamines in the cell and a  corresponding  increase in the amount of
analogues  in the cell.  Because  cancer  cells  have a high  rate of  polyamine
biosynthesis  and contain higher  concentrations  of essential  polyamines  than
normal  cells,  the Company  believes  that the  substitution  of its  polyamine
analogues for the naturally  occurring  polyamines will counteract the increased
level of polyamines present in the cancer cells, thereby reducing the ability of
the cancer cells to proliferate.

         The  Company has  discovered,  through  its  sponsored  research at the
University  of  Florida,   that  certain   polyamine   analogues   modify  other
cell-related  activities  besides  cell  proliferation.   For  example,  Company
sponsored work on uncovering  DEHOP's mechanism of action in arresting  diarrhea
suggests that DEHOP  interacts with several  receptor  complexes,  including the
N-methyl-D-aspartate  ("NMDA") receptor,  which control neuromuscular  function.
Additional  evidence  suggests that DEHOP also stimulates  nitric oxide release,
which could be  responsible  for DEHOP's  promotion of the  relaxation of smooth
muscles  in  the  gastrointestinal   tract.  This  is  consistent  with  studies
indicating that the smooth muscle  relaxation  promoted by DEHOP is inhibited by
the nitric oxide synthase inhibitor L-NAME.

PRODUCTS UNDER DEVELOPMENT

         The Company  currently has 5 compounds in various stages of research or
development, targeting 10 indications, including two compounds that have reached
Phase I or II  clinical  trials.  These  products  are based on novel  polyamine
analogue  compounds   developed  at  the  University  of  Florida  and  licensed
exclusively to the Company.  Additional compounds and/or indications  discovered
by Dr.  Bergeron  and his  staff  will also be  licensed  to the  Company  on an
exclusive  worldwide  basis  pursuant  to the terms of the  Company's  sponsored
research  agreement  with  the  University  of  Florida.   The  following  table

                                      -2-
<PAGE>

summarizes the current product portfolio,  or pipeline,  which has resulted from
the license  agreement and sponsored  research  agreement with the University of
Florida:

<TABLE>
<CAPTION>
                                                 PRODUCT PIPELINE
- ----------------------------------------------------------------------------------------------------------------------

DISEASE AREA             COMPOUND                       INDICATION                               STATUS
- ----------------------------------------------------------------------------------------------------------------------
<S>                       <C>                           <C>                            <C>                            
Cancer                    DENSPM                        all cancers                    Phase II commenced 1st Qtr. 1998
                                                                                       by Warner-Lambert Co.

                          DEHOP                         all cancers                    Phase I patient enrollment
                                                                                       completed; clinical summary in
                                                                                       progress

                          DEHOP                         non-Hodgkins                   Phase I commenced February 1998
                                                        lymphoma

                          DEHOP derivative              pancreatic carcinoma           Preclinical development

- ----------------------------------------------------------------------------------------------------------------------
AIDS                      DEHOP                         AIDS-related diarrhea          Phase II completed 3rd Qtr. 1997


- ----------------------------------------------------------------------------------------------------------------------
Gastrointestinal          DEHOP                         ulcerative colitis             IND allowed; Phase I/II commenced
Disorders                                                                              November 1997

                          DEHOP                         chemotherapy-induced           Phase I/II protocol approved by IRB
                                                        diarrhea

                          Cyclic analogues              GI-inflammation                Preclinical development

- ----------------------------------------------------------------------------------------------------------------------
Others                    DENSPM                        psoriasis                      Preclinical development

                          HBED                          iron overload                  Preclinical development

- ----------------------------------------------------------------------------------------------------------------------
</TABLE>

CANCER

         BACKGROUND.  The American  Cancer Society  estimates that more than 1.2
million new cases of cancer will be diagnosed and more than 560,000  people will
die of cancer in 1998 in the United States. Chemotherapy,  surgery and radiation
are the major  components in the current  treatment of cancer.  Chemotherapy  is
usually the primary  treatment for cancers,  such as  hematologic  malignancies,
which cannot be excised by surgery.  In addition,  chemotherapy  is increasingly
being used as an adjunct  to  radiation  and  surgery  to improve  efficacy  and
address metastases (the spread of cancer), and as primary therapy for some solid
tumors. The standard strategy for chemotherapy is to destroy the malignant cells
by exposing them to as much drug as the patient can tolerate. Clinicians attempt
to design a combination of drugs,  dosing schedule and method of  administration
that increases the  probability  that malignant  cells will be destroyed,  while
minimizing the harm to healthy cells.

                                      -3-
<PAGE>

         Most current  anti-cancer drugs have significant  limitations.  Certain
cancers,  such as colon,  lung,  kidney and pancreatic  cancers,  are inherently
unresponsive  to  chemotherapeutic  agents.  Certain other cancers may initially
respond to a  chemotherapeutic  agent,  but cease to respond as the cancer cells
acquire  resistance  to the drug  during the course of  therapy.  As such cancer
cells  develop  resistance  to a  specific  chemotherapeutic  agent,  they often
simultaneously  become  resistant  to a wide variety of  structurally  unrelated
agents through a phenomenon known as "multi-drug  resistance." Finally,  current
anti-cancer  drugs are generally  highly toxic,  with  effects,  including  bone
marrow  suppression  and  irreversible  cardiotoxicity,  which can prevent their
administration in therapeutic doses.

         DENSPM.  Phase I clinical trials for DENSPM in refractory  solid cancer
commenced in January 1994 at the University of Florida, Johns Hopkins University
and Roswell Park Cancer  Institute.  The protocol allowed for one, two and three
times  per day  dosing  regimens  at each  center,  respectively,  in  order  to
determine  DENSPM's  maximum  tolerated  dose and side effects.  The Company and
Warner-Lambert, its sublicensee, have agreed that the maximum tolerated dose has
been determined at all dosage  regimens.  In December 1996, the Company received
the  remaining   $500,000  of  the   $1,000,000   milestone   payment  due  from
Warner-Lambert  upon reaching that  milestone,  and  transferred the IND for the
clinical trial to Warner-Lambert. Warner-Lambert has recently commenced Phase II
clinical trials of DENSPM in six solid tumor cancers and will be responsible for
all subsequent clinical development of the compound (excluding Japan).

         DEHOP.  This compound was first tested at the  University of Florida in
five  cancer  patients  during  1988 and 1989.  The  purpose of the study was to
determine a safe dosage for DEHOP in cancer patients,  and no drug-related  side
effects  were  observed  except for  constipation.  This led the Company and its
researchers  at the University of Florida to test DEHOP for use in treating AIDS
patients who suffer from chronic diarrhea. See "--AIDS" and  "--Gastrointestinal
Disorders."

         Early studies conducted by the Company demonstrated that DEHOP may have
anti-proliferative  properties.  As a result,  the Company filed an IND in March
1996 for a Phase I clinical trial to test DEHOP in cancer  patients.  The study,
which commenced in October 1996, has been conducted by Dr. George Wilding at the
University  of Wisconsin  Comprehensive  Cancer  Center,  with  funding  under a
federal grant from the National  Cancer  Institute.  The study is a dose ranging
trial conducted in cancer patients to determine  safety,  pharmacokinetics,  and
maximum tolerated dose. An adverse event was recemtly observed in this trial; at
a dose  level  five  times  higher  than was used in the Phase II AIDS-  related
diarrhea  trial.  A  clinical  summary  for this  trial is now  being  prepared.
Meanwhile,  the Company is continuing to evaluate safety data from this trial in
determining whether to continue  development of DEHOP for cancer indications and
in  relation  to trials for other  DEHOP  indications.  See "Risk  Factors -- No
Assurance of Successful Product Development or Commerialization".

         Non-Hodgkin's  lymphoma ("NHL") associated with human  immunodeficiency
virus ("HIV") occurs in approximately 10% of AIDS patients.  The median survival
rate for these patients is approximately  five to six months with therapy.  Most
of these patients die directly from NHL or from infectious  complications.  Very
few HIV or AIDS  patients  are ever cured of their NHL,  if  first-line  therapy
fails.  Preclinical  research indicates that lymphocytes from HIV-associated NHL
patients  are  uniformly  sensitive to DEHOP IN VITRO.  The Company  commenced a
Phase I trial of DEHOP for this  indication  in February  1998.  Among the first
five  patients  enrolled in the trial,  a positive  clinical  response  has been
observed.  The Company is  continuing to evaluate the impact of safety data from
its Phase I  clinical  trial for  cancer  in the  development  of DEHOP for this
indication.

         DEHOP  DERIVATIVE.  Preclinical  studies  indicate that a derivative of
DEHOP may be useful in treatment of pancreatic carcinoma. Several animal studies
have demonstrated  that this compound  concentrates in the exocrine pancreas and
after a relatively  short use causes  almost  complete  atrophy of the pancreas,
while sparing the insulin  producing  endocrine  cells.  Because the  pancreatic
cells are irreversibly  altered by the compound,  this finding is expected to be
relevant to the treatment of pancreatic carcinoma,  a rapid and invariably fatal
neoplastic  disease.  Preclinical IN VITRO and IN VIVO efficacy studies relevant
to this indication are anticipated to be completed by mid-year 1998. Preclinical
safety studies may commence shortly thereafter, provided the results of efficacy
studies warrant continued development.


                                       -4-
<PAGE>
AIDS

         BACKGROUND.  AIDS,  which is a disease  caused by HIV, is a devastating
viral  infection  that  destroys  the immune  system of affected  patients.  The
Centers for Disease  Control and  Prevention  ("CDC")  estimates that nearly one
million  people in the United  States and over 30 million  people  worldwide are
infected  with HIV.  The CDC  confirms  that over  600,000  AIDS  cases had been
reported in the United States as of June 30, 1997.

         Disorders of the gastrointestinal tract are common in AIDS patients. It
is estimated  that between 50% and 80% of all AIDS  patients and between 20% and
30% of all  HIV-positive  patients suffer from several bouts of chronic diarrhea
during the  course of their  disease.  Most of these  patients  have  periods of
stable weight  interspersed  with  episodes of heavy  diarrhea and rapid wasting
that  often  occur  while  the  patient  is  suffering  from  active   secondary
infections.  Over time,  the  patient's  recovery from bouts of diarrhea is less
complete, producing long-term loss of body cell mass. The causes of AIDS-related
diarrhea  and weight loss are not yet fully  understood,  and the  condition  is
often unresponsive to medical therapy. Of the HIV-positive patients with chronic
diarrhea, a pathogen can be identified as the cause in roughly 50% of the cases,
and, among those patients with an identifiable  pathogen,  approximately 50% (or
only 25% of all HIV-positive patients with chronic diarrhea) can be treated with
antibiotic  therapy.  Treatment is therefore  empiric and uses a combination  of
anti-diarrheal   agents   including   opiates,   loperamide,    octreotide   and
diphenoxylate.

         A 1993  quality of life study  conducted  by  researchers  at  Stanford
University  School of Medicine  showed that the annual  charge to patients  with
AIDS was 70% higher ($24,567 versus $14,471) for patients with diarrhea than for
those without such symptoms.  These patients also suffered more significant work
loss and reported a greater need for assistance in the home.

         DEHOP.  In January 1994,  the U. S. Food and Drug  Administration  (the
"FDA")  allowed an  Investigator  IND submitted by the  University of Florida to
conduct  Phase I clinical  trials of DEHOP as a possible  treatment  for chronic
AIDS-related  refractory  diarrhea.  The first  segment  of the Phase I clinical
trial,  to  determine  side  effects,  was  completed  in June  1994.  Five AIDS
patients,  for whom  treatments with other  anti-diarrheal  medications had been
unsuccessful,  received  doses which were  three-to  five-fold  lower than those
doses  previously  given to cancer  patients  in a  previous  study of DEHOP for
cancer conducted in 1989. All five patients experienced a significant  reduction
in stool volume with no measurable adverse side effects.  An expanded segment of
the  Phase I  clinical  trial  in a total  of  fifteen  evaluable  patients,  to
determine safety,  route of administration and dosage regimen,  was completed in
December 1994. Across the three dose levels tested, ten responded  positively to
the  drug.  A Phase II  clinical  trial of DEHOP  was  conducted  on  refractory
AIDS-related  diarrhea  under a sponsored  IND,  which was allowed by the FDA in
January 1996, to establish safety and appropriate  dosing regiments for use in a
future  pivotal   clinical  trial.  In  December  1997,  the  Company   reported
statistically  significant results of the Phase II multicenter clinical trial of
DEHOP.

         Overall,  the  Phase I and II  clinical  trials  demonstrated  positive
response rates of 53% and 80%, respectively,  in AIDS patients with very severe,
refractory diarrhea. Although a small number of drug-related adverse events were
reported  in each  study,  the  Company  believes  that the  risks  to  patients
associated  with the observed  adverse events are outweighed by the  significant
anti-diarrheal benefit of the drug observed in its clinical trials and that they
do not preclude  further  development of DEHOP for  AIDS-related  diarrhea.  The
Company is  continuing  to  evaluate  the impact of safety data from its Phase I
clinical  trial  of DEHOP  for  cancer  on the  development  of  DEHOP  for this
indication. See "--Cancer - DEHOP".

         During  the  planned  pivotal  clinical  trial of DEHOP,  for which the
Company expects to complete patient  enrollment  within  approximately 18 months
after its commencement,  the Company may seek Treatment IND status for DEHOP. If
the FDA approves such status,  the Company  could  commence  limited  commercial
distribution of DEHOP prior to its submission of a New Drug Application ( "NDA")
for DEHOP. No assurance can be made,  however,  that the pivotal clinical trials
of DEHOP will be successful, that patient enrollment will be completed within 18
months,  or that, in any event,  the FDA would approve  Treatment IND status for
DEHOP.  See "Risk Factors -- No Assurance of Successful  Product  Development or
Commerialization".

                                       -5-
<PAGE>

GASTROINTESTINAL DISORDERS

         DEHOP.  Ulcerative  colitis is an idiopathic form of inflammatory bowel
disease  affecting  approximately  two  million  people  in the  United  States.
Ulcerative colitis consists of a diffuse, continuous,  inflammatory process that
always involves the rectum,  varies in its proximal  extent,  but never involves
the small intestines.  The etiology of ulcerative colitis remains uncertain, but
genetic,  infectious,   immunological,   and  psychological  factors  have  been
implicated as possible pathogenetic  mechanisms in producing the chronic mucosal
inflammatory condition and its resulting ulcerative and hemorrhagic sequelae. To
date the disease is treated with  sulfasalazine,  other 5-ASA  compounds  and/or
rectal   corticosteroids.   None  of  these  treatments  is  very  effective  in
alleviating the signs and symptoms of ulcerative colitis.

         Preclinical  investigation with DEHOP in animal models for inflammatory
bowel disease (ulcerative colitis) indicates that the compound exerts protective
and  anti-inflammatory  effects  in the mucosa of the  colon.  Accordingly,  the
Company   believes  that  DEHOP,   owing  to  its   biochemical,   antimotility,
antisecretory  and  mucosal-protective  properties,  may  palliate or  attenuate
colonic mucosal  inflammatory  infiltrates and the signs and symptoms of mild to
moderate ulcerative colitis. To test this theory, an IND was allowed by the Food
and Drug Administration in March 1997. Dr. Steven Hanauer, a clinical researcher
at the  University of Chicago,  agreed to conduct a Phase I/II clinical trial in
patients with mild to moderate ulcerative  colitis.  Patient enrollment for this
trial  commenced in November  1997.  The Company is  continuing  to evaluate the
impact of safety data from its Phase I clinical trial of DEHOP for cancer on the
development of DEHOP for this indication. See "--Cancer -- DEHOP".

         The Company also intends to test the  anti-diarrheal  activity of DEHOP
in cancer patients with CPT-11 induced  late-onset  diarrhea,  for which a Phase
I/II protocol has been approved by Institutional Review Boards under an existing
sponsor  IND, at two  clinical  trial  sites.  Given the  susceptibility  of the
gastrointestinal tract to chemotherapy  toxicity,  largely due to rapid turnover
of mucosal  cells,  diarrhea  has been  observed  in as many as 75% of  patients
receiving chemotherapy. The inability to adequately control chemotherapy-induced
diarrhea  with existing  anti-diarrheal  agents can possibly  limit  delivery of
optimal  therapies.The  Company is  continuing  to evaluate the impact of safety
data from its Phase I clinical  trial of DEHOP for cancer on the  development of
DEHOP for this indication. See "--Cancer -- DEHOP".

OTHER DISEASE AREAS

         PSORIASIS

         DENSPM. The Company believes that DENSPM may have potential application
for the treatment of psoriasis.  Patients with psoriasis have been found to have
increased local ODC activity,  elevated systemic  polyamine levels and increased
urinary polyamine excretion.  Experimental studies conducted ten years ago using
various   models   of  mouse   skin   have   shown   that   the  ODC   inhibitor
Difluoromethylornithine   ("DFMO"),   administered  systemically  or  topically,
prevented  polyamine  accumulation  and  subsequently  inhibited  tissue growth,
indicating  the  potential  use of DFMO in the  treatment of  hyperproliferating
disorders of human skin. Seven of ten patients  treated  topically with DFMO for
psoriasis  in  clinical   studies   experienced   moderate   improvement.   DFMO
significantly  reduced  putrescine and spermidine  concentrations of the skin in
these patients. Because of the marginal clinical efficacy of the DFMO treatment,
partly  attributable to poor permeability into human skin, DFMO has not gained a
foothold in the  treatment  of  psoriasis.  DENSPM,  however,  has been shown to
penetrate  mouse  skin  and to  have  cytostatic  properties.  Company-sponsored
preclinical  studies  of  DENSPM  as a  possible  treatment  for  psoriasis  are
presently being conducted at the University of Florida. In addition, the Company
has completed skin safety and  hypersensitivity  studies in animals. The Company
anticipates  that a Physician IND application  will be filed in 1998 for testing
DENSPM against psoriasis in human clinical trials.

         CYCLIC ANALOGUES. In preclinical testing, several cyclic analogues have
shown substantial anti-inflammatory and cardiovascular activity. The preclinical
testing  necessary to determine  which analogue and what indication to pursue is
continuing in 1998.

                                      -6-
<PAGE>

         IRON OVERLOAD

         HBED. In addition to the Company's novel polyamine analogues,  a second
technology platform, consisting of proprietary metal chelator compounds invented
at the  University  of Florida,  has been licensed  exclusively  to the Company.
Metal chelators are drugs that bind tightly to certain metals,  such as iron, in
the  bloodstream and inside cells,  acting to eliminate  quantities in excess of
the body's  needs,  thereby  avoiding  damage to vital organs such as the liver,
heart and pancreas.  Chelators are  administered to supplement the body's poorly
developed ability to get rid of excess metal concentrations.  Iron levels can be
found  in   disorders   such  as  Cooley's   anemia,   sickle  cell  anemia  and
hemochromatosis.  The currently  available  treatment  for Cooley's  anemia is a
daily infusion of a currently available iron chelator, desferrioxamine ("DFO").

         In March  1998,  the  National  Institutes  of  Health  (NIH)  issued a
statement    on    research    at    the     University    of    Florida    with
hydroxybenzylethylenediamine  diacetic  acid  ("HBED").  When tested in rats and
primates  overloaded with iron, HBED removed up to 3 times more iron than DFO by
subcutaneous  administration.  The  study  was  funded  in part by the  National
Institute  of Diabetes  and  Digestive  and Kidney  Diseases and appeared in the
February 15 issue of the science journal BLOOD.

         The Company  believes that HBED presents a promising  drug  development
opportunity,  possibly  leading to a more effective  treatment that is easier to
administer  for  patients  with iron  overload.  Preclinical  testing of HBED is
continuing at the  University of Florida.  Testing in human subjects is expected
to begin after the filing of a Physician IND later in 1998.

STRATEGIC ALLIANCES

         WARNER-LAMBERT AGREEMENT

         In May 1993,  the Company  entered  into a  sublicense  agreement  with
Warner-Lambert,  a multi-national pharmaceutical manufacturer and marketer, with
respect to DENSPM.  The  agreement  grants  Warner-Lambert  exclusive  worldwide
rights  (excluding  Japan) to  manufacture  and  market  DENSPM  for all  cancer
indications in exchange for certain license fees,  advance royalty  payments and
development milestone payments, of which Warner-Lambert has paid a total of $2.6
million to date. Warner-Lambert will also pay the Company a royalty on all sales
of products incorporating this compound.  The Warner-Lambert  agreement provides
for  additional  payments to the Company on the  completion of Phase II clinical
trials,  filing of the NDA for DENSPM,  and  approval of the NDA for  commercial
sale of DENSPM.  The Company's  rights to receive such payments are dependent on
the  achievement of these  milestones by  Warner-Lambert  and are not within the
control of the Company.

         Pursuant to the agreement,  the Company was  responsible for conducting
Phase I clinical  trials for  DENSPM,  and  Warner-Lambert  is  responsible  for
completing all remaining  clinical trials at its expense.  Warner-Lambert  has a
right of first  refusal  to acquire  the rights to DENSPM for other  indications
should  the  Company  elect to  sublicense  the  development  of DENSPM for such
indications.  If  Warner-Lambert  elects  to  subcontract  any  portion  of  the
manufacturing  of the  compound to a third  party,  the Company has the right to
match such third party's offer under certain circumstances.

         The    Warner-Lambert    sublicense    agreement    terminates   on   a
country-by-country   basis,  upon  the  later  of  (i)  the  expiration  of  the
last-to-expire  patent in such country or (ii) ten years after the  commencement
of marketing of a product in that country.

         In June 1996, Warner-Lambert acquired a 12-month option to other linear
polyamines  for use in cancer  indications  in exchange for an early  payment of
$500,000,  one half of the milestone  payment due upon completion of the Phase I
clinical study of DENSPM. In December 1996,  Warner-Lambert agreed that SunPharm
had met its  obligations  under the  sublicense  agreement for completion of the
Phase I study,  and the IND was  transferred to Warner-  Lambert in exchange for
the remaining portion of the $1.0 million milestone payment.

                                      -7-
<PAGE>

         NIPPON KAYAKU AGREEMENT

         In February  1994,  the Company  entered into an agreement  with Nippon
Kayaku with respect to the Japanese  marketing and development  rights to DENSPM
for cancer  indications.  Nippon Kayaku has committed to make staged payments to
the  Company  for  research  and  development  milestones,  of which it has paid
$225,000 to date, together with royalties on all sales of products incorporating
DENSPM.  The Nippon Kayaku  agreement  provides for  additional  payments to the
Company on commencement of Phase I and Phase II clinical trials in Japan, on the
submission  of,  and on the  approval  of, an NDA in Japan,  and on the later to
occur of product  pricing  approval  or patent  approval  in Japan.  The Company
anticipates  receiving a payment of $500,000  from Nippon Kayaku in 1999, on the
event of commencement of Phase I clinical trials in Japan.  The Company's rights
to receive such payments are dependent on the achievement of these milestones by
Nippon  Kayaku and are not within the control of the Company.  Nippon  Kayaku is
responsible for completing all necessary Japanese clinical trials and associated
regulatory  submissions  at its  expense.  The Company has retained the right to
supply  Nippon  Kayaku with all of its bulk product  requirements  for marketing
DENSPM in Japan.

LICENSED TECHNOLOGY AND SPONSORED RESEARCH

         The Company  holds an  exclusive  worldwide  license to the  commercial
rights to polyamine  compounds  and various iron  chelators and their uses under
more than 41 issued  United  States and  foreign  patents and  numerous  pending
patent applications held by the University of Florida Research Foundation,  Inc.
("UFRFI"),  the  technology  transfer  subsidiary of the  University of Florida.
Separately,   the  Company  has  also  acquired   exclusive   rights  to  patent
applications covering a novel process of chemically synthesizing DFO.

         The  agreements  pursuant  to which the Company has the rights to these
patents  require the Company to file and prosecute  the patents  relating to the
technology licensed to the Company,  the costs of which are paid by the Company.
Further,  the Company takes all necessary steps to defend such patent rights. If
the Company  fails to take any such  action,  UFRFI has the right to defend such
rights at its own expense.

         No assurance can be given that any existing patent application,  or any
future patent applications,  will be issued or that any patents, if issued, will
provide the Company with adequate patent  protection with respect to the covered
products,  their uses, technology or processes.  In addition,  under its license
with UFRFI,  the Company is required to meet  specified  milestone and diligence
requirements to retain its license of these patents.

         LICENSE AGREEMENT

         The Company and UFRFI  entered  into a Patent  License  Agreement  with
Research  Component  (the  "1991  License   Agreement")  in  December  1991,  as
subsequently  amended pursuant to which UFRFI granted to the Company a worldwide
exclusive  license to its rights under certain  patents and patent  applications
relating to polyamine and metal chelator  technology  invented by Dr.  Bergeron.
The Company  has rights  under the 1991  License  Agreement  to all  indications
currently under development and, with respect to all patent  applications  filed
for inventions  discovered during the term of the Company's  sponsored  research
agreement,  the Company  obtains rights for all  indications and uses for humans
and animals.  The Company's license is subject to certain  diligence  milestones
related to product  development and regulatory  applications,  product marketing
and certain other matters. UFRFI may terminate the 1991 License Agreement if the
Company  fails to meet  certain of these  milestones;  provided,  however,  such
termination  will be limited to a particular  compound if the default is related
to a particular compound only. UFRFI may terminate the 1991 License Agreement in
its  entirety if the  Company  defaults  in its  payment  obligations  under the
sponsored research agreement.


                                      -8-
<PAGE>

         Under the 1991  License  Agreement,  the  Company is  obligated  to pay
royalties on sales of products,  subject to certain annual minimum royalties and
reimbursement  of patent  costs  incurred  by the  Foundation.  These  royalties
include a royalty on net sales of the Company's products of between five and six
percent  and a royalty of 28 percent  (increasing  to 35 percent  under  certain
circumstances)  on  royalty  and  license  payments  made to the  Company by its
sublicensees.  Payments to UFRFI on sales of products  by  sublicensees  may not
however,  be less than two percent of sublicensee sales. The Company is required
to pay a minimum annual royalty of $100,000 on each anniversary date of the 1991
License Agreement, which is credited against royalties and research payments due
under the sponsored research agreement.

         Under the 1991 License  Agreement,  as amended,  the Company has issued
UFRFI a total of 342,760  shares of Common  Stock,  which  shares are subject to
certain  limitations  on sales under an  agreement  with the  Company.  The 1991
License  Agreement  terminates  when the last  patent  licensed  to the  Company
expires or December 9, 2011, whichever is later.

         RESEARCH AGREEMENT

         The Company and UFRFI also entered into a Corporate  Research Agreement
(the "Sponsored Research Agreement") in December 1991 (and subsequently amended)
which provides that the Company will fund the research and  development  work of
Dr.  Bergeron's  laboratory  through December 1998, at an annual cost (including
direct and indirect costs) of $875,000,  commencing in January 1997. The Company
has made all required payments under the Sponsored  Research  Agreement to date.
Under the Sponsored  Research  Agreement,  any new invention covered by the 1991
Licensed Agreement will be licensed to the Company on the same terms as the 1991
License Agreement without any additional license fees to the Foundation.

         The Company has a close working  relationship  with Dr. Bergeron at the
University  of  Florida,  who is engaged as a  consultant  to the  Company,  and
Company  management  and  the  scientists  at the  University  of  Florida  meet
regularly to review the progress and direction of the University's efforts under
the Sponsored  Research  Agreement.  A total of 15 scientists and technicians at
the  University  of Florida  are  working on the  Company's  products  under Dr.
Bergeron's  supervision,  five of whom have  Ph.D.  degrees.  By  utilizing  the
significant   resources   of  the   University   of   Florida,   including   its
state-of-the-art  equipment, its laboratory facilities for synthesis,  analyses,
pharmacology,  toxicology,  IN VITRO and IN VIVO  studies,  and its clinical and
animal facilities,  the Company believes that it has accomplished  significantly
more in the  development of its licensed  compounds than it would have been able
to do on its own, without substantially greater need for capital.

         The Company has  incurred  costs of research and  development  totaling
approximately $1,865,000, $2,228,000 and $2,417,000 for the years ended December
31, 1995,  1996 and 1997,  respectively.  The Company has incurred  research and
development costs of approximately  $9,986,000 for the period from the Company's
inception on May 3, 1990 through December 31, 1997.

PATENTS AND PROPRIETARY TECHNOLOGY

         Subject  to a  nonexclusive  statutory  license  to the  United  States
government,  the  Company is the  exclusive  licensee  of over 41 issued  United
States and foreign patents and numerous pending patent applications. The Company
is required to meet specified  milestone and diligence  requirements in order to
retain its license to the patents and other  proprietary  rights  licensed  from
UFRFI.  No  assurance  can be given that the Company  will  satisfy any of these
requirements.


                                      -9-
<PAGE>

         The Company's  success will depend,  in part, on the validity and scope
of the  patents  and patent  applications  licensed  from the UFRFI,  and on its
ability to operate without infringing on the proprietary rights of others. Other
parties have filed patent applications, and some patents may have been or may be
issued in the therapeutic areas in which the Company is developing products.  If
any of the Company's proprietary technology in these areas were to conflict with
the rights of others, the Company's ability to commercialize products using such
technologies could be materially and adversely affected.

         The patent  position of  pharmaceutical  companies  generally is highly
uncertain  and involves  complex  legal and factual  questions.  There can be no
assurance  that  the  patents  licensed  from  UFRFI  will  provide  substantial
protection or  commercial  benefit to the Company,  afford the Company  adequate
protection from competing products,  or not be challenged or declared invalid or
that  additional  related United States or foreign  patents will be issued,  the
occurrence of any of which could have a material adverse effect on the Company's
operations.  While the United States government could use its rights as licensee
of UFRFI's  patents to increase the supply of products  based on such patents or
to reduce the cost of treatment  with such  products,  the Company is unaware of
any instance in which federal  authorities  have  exercised  such rights in that
manner.

         Certain proprietary trade secrets and unpatented know-how are important
to the  Company.  There can be no  assurance  that others may not  independently
develop the same or similar technologies.  It is the Company's policy to require
all employees and consultants to execute  confidentiality  agreements protecting
the Company's  proprietary  information.  In addition,  the Company's  sponsored
research  agreement  with  the  University  of  Florida  requires   confidential
treatment by the  University  of Florida and its  employees  of the  proprietary
information  owned  by  or  licensed  to  the  Company.   Notwithstanding   such
agreements,   however,  third  parties  nonetheless  may  gain  access  to  such
information.

         There  has  been  significant   litigation  in  the  biotechnology  and
pharmaceutical  industry regarding patents and other proprietary  rights. If the
Company  became  involved  in  similar  litigation  regarding  its  intellectual
property rights, the cost of such litigation could be substantial.

GOVERNMENT REGULATION

         In the  United  States,  the  Company's  polyamine  analogue  and  iron
chelator products are regulated under the Federal Food, Drug and Cosmetic Act by
the FDA's Center for Drug  Evaluation and Research.  The steps required before a
pharmaceutical  product  may  be  marketed  in the  United  States  include  (i)
preclinical  laboratory  evaluation of product  chemistry and animal  studies to
assess  the  safety  and  efficacy  of the  product  and its  formulation;  (ii)
submission to the FDA of an IND, which  includes the results of the  preclinical
studies and,  unless the FDA objects,  becomes  effective 30 days  following its
filing  with the FDA (and which must  become  effective  before  human  clinical
trials may commence);  (iii) adequate and well-controlled  human clinical trials
to  establish  the  safety and  efficacy  of the drug (and  which  provide  data
satisfying FDA data integrity standards);  (iv) submission of an NDA to the FDA;
and (v) FDA approval of the NDA prior to any commercial  sale or shipment of the
drug. In addition to obtaining FDA approval for each product, each domestic drug
manufacturing  facility is subject to inspections every two years by the FDA and
must  comply with the FDA's Good  Laboratory  Practices  and Good  Manufacturing
Practices.

         In the United States, human clinical trial programs generally involve a
three-phase  process.  Typically,  Phase  I  trials  are  conducted  in  healthy
volunteers  to determine the early  side-effect  profile and the pattern of drug
distribution and metabolism. Phase II trials are conducted in groups of patients
afflicted with the target disease to provide sufficient


                                      -10-
<PAGE>

data for the  statistical  proof of  efficacy  and  safety  required  by federal
regulatory  agencies.  If Phase II evaluations indicate that a product has shown
indications  of potential  effectiveness  and has an acceptable  benefit-to-risk
profile,  Phase III trials are undertaken to conclusively  demonstrate  clinical
efficacy and safety  within an expanded  population at multiple  clinical  study
sites.  Sometimes,  the FDA requires  Phase IV studies to track patients after a
product is approved for commercial  sale to identify side effects that may occur
in a small number of patients.

         In the case of  drugs  for  cancer,  AIDS  and  other  life-threatening
diseases, the initial human testing is generally done in patients rather than in
healthy volunteers. Because these patients are already afflicted with the target
disease,  these studies may provide results  traditionally  obtained in Phase II
studies.  Similarly,  Phase  II  studies  may be  expanded  to  provide  results
generally  obtained in Phase III studies  (such  expanded  studies are generally
referred to as Phase II/III  studies).  As a result,  subject to  obtaining  the
necessary FDA approvals,  the clinical trial process for cancer,  AIDS and other
life-threatening  diseases may be shortened in  comparison  with the process for
non-life-threatening  diseases. No assurance can be given, however, that the FDA
will grant such approvals.

         The Company will also be subject to widely varying foreign  regulations
governing clinical trials and pharmaceutical  sales. Whether or not FDA approval
has  been  obtained,   approval  of  a  product  by  the  comparable  regulatory
authorities  of foreign  countries  must be obtained  prior to  commencement  of
marketing  the product in those  countries.  The  approval  process  varies from
country to country, and the time may be shorter or longer than that required for
FDA approval.  The Company intends, where applicable and to the extent possible,
to rely on licensees to obtain  regulatory  approval for marketing the Company's
products in foreign countries.

         From  the  time  an  NDA  is  filed,   regulatory  approval  of  a  new
pharmaceutical product often takes up to two years for life-threatening diseases
and longer for  non-life-threatening  diseases and involves the  expenditure  of
substantial  resources.  Approval depends on a number of factors,  including the
severity of the disease in question,  the availability of alternative treatments
and the risks and benefits demonstrated in clinical trials.

         During  the  pendency  of  Phase  II/III  trials  for its  products  or
thereafter,  the Company may file for Treatment  IND status under  provisions of
the IND  regulations.  These  regulations  apply  to  products  for  serious  or
life-threatening diseases and are intended to facilitate the availability of new
products to desperately  ill patients after clinical  trials have shown evidence
of efficacy,  but before general marketing approval has been granted by the FDA.
Under these regulations,  the Company may have an opportunity to recover some of
the costs of  research,  development  and  manufacture  of its  products  before
marketing  begins..  However,  no assurance  can be made that the FDA will grant
Treatment IND status to any of the  Company's  products,  even after  sufficient
clinical data have been obtained, or that the Company will be able to charge for
use of such products.

COMPETITION

         The Company has numerous  competitors,  including major  pharmaceutical
and chemical companies,  specialized biotechnology firms, universities and other
research institutions.  These competitors may succeed in developing technologies
and products that are more effective  than those being  developed by the Company
or which  would  render the  Company's  technology  and  products  obsolete  and
noncompetitive.  Many of these competitors have substantially  greater financial
and technical  resources and  production  and  marketing  capabilities  than the
Company.  In addition,  many of the  Company's  competitors  have  significantly
greater  experience  than the Company in preclinical  testing and human clinical
trials of new or improved pharmaceutical products and in obtaining FDA and other
regulatory approvals of products for use in health care.


                                      -11-
<PAGE>

         The  Company  is  aware  of  various  products  under   development  or
manufactured  by  competitors  that are used for the  prevention,  diagnosis  or
treatment of certain diseases the Company has targeted for product  development,
some of which use  therapeutic  approaches  that  compete  with  certain  of the
Company's potential products. For example, the Company believes that Novartis is
developing a product which targets SAMDC, one of the two enzymes responsible for
the  biosynthesis  of  polyamines in human cells.  Novartis is also  marketing a
natural  form of DFO for  iron  overload  dysfunctions  ("DesferralR"),  and has
significantly greater resources than the Company.

         The Company has limited  experience  in  conducting  and  managing  the
clinical  trials  required to obtain  government  approvals  and has not to date
managed a set of  clinical  trials to  completion.  Accordingly,  the  Company's
competitors may succeed in obtaining FDA approval for products more rapidly than
the  Company,  which could  adversely  affect the  Company's  ability to further
develop and market its products. If the Company commences significant commercial
sales of its products,  it will also be competing with respect to  manufacturing
efficiency and marketing capabilities, areas in which the Company has limited or
no experience.

EMPLOYEES

         As of March 31, 1998, the Company had eight full-time employees and one
part-time  employee,  including one  analytical  chemist in its quality  control
laboratory.   All  of  the  Company's   preclinical   and  clinical   tests  are
subcontracted and performed at the University of Florida or other  collaborative
entities.  Although  the  Company  has  obtained a $1.0  million key person life
insurance  policy on the life of Stefan  Borg,  of which the Company is the sole
beneficiary,  the loss of Mr. Borg's services could nevertheless have a material
adverse effect on the Company.

RISK FACTORS

         DEVELOPMENT STAGE COMPANY

         The Company is in the  development  stage and has realized to date only
limited   revenues,   all  of  which  have  been  derived  from   payments  from
Warner-Lambert  and Nippon Kayaku in connection with having achieved  identified
research  milestones  with  respect to DENSPM.  The  Company  has  generated  no
revenues to date from product sales,  and it does not expect to generate revenue
from  product  sales for at least  several  years.  The Company has incurred net
losses since  commencement of its operations and it expects to continue to incur
losses for the foreseeable  future.  As of December 31, 1997, the Company had an
accumulated deficit of $15.5 million.  Moreover,  there can be no assurance that
the Company will successfully complete the transition from a development company
to successful operations and/or profitability.

         NO ASSURANCE OF SUCCESSFUL PRODUCT DEVELOPMENT OR COMMERCIALIZATION

         Since its inception, the Company has devoted its efforts exclusively to
the  research  and  development  of  potential   pharmaceutical  products  based
primarily upon its licensed polyamine analogue and metal chelator  technologies.
While  one of these  analogues,  DEHOP,  recently  completed  Phase II  clinical
trials,  and another  analogue,  DENSPM,  has  recently  begun Phase II clinical
trials,  such trials are typically not sufficient to  demonstrate  the safety or
efficacy of these products,  requiring substantial further clinical trials to be
successfully    completed   before   such   products   may   be   approved   for
commercialization.  There can be no assurance that DEHOP or DENSPM, or any other
potential  product  currently in  development  or developed in the future,  will
prove to be safe or effective in clinical  trials,  meet  applicable  regulatory
standards,  be capable of being produced in commercial  quantities at acceptable
cost, or be successfully marketed.  See "-- Government Regulation;  No Assurance
of Regulatory Approval".


                                      -12-
<PAGE>

         NEED FOR ADDITIONAL FINANCING

         The Company has expended and will continue to expend  substantial funds
to continue the research and  development of its products,  conduct  preclinical
and clinical trials,  establish  clinical and commercial scale  manufacturing in
its own facilities or in the facilities of others, and market its products.  The
amount and timing of such expenditures are subject to a number of factors. Based
on its current operating plan, the Company anticipates that its existing capital
resources  will be  adequate  to satisfy  its  capital  needs  through the first
quarter of 1999, but will not be sufficient to fund the Company's  operations to
the point of introduction of a commercially  successful  product.  The Company's
rights to receive payments from  Warner-Lambert  and Nippon Kayaku are dependent
upon the achievement of certain development and commercialization  milestones by
Warner-Lambert and Nippon Kayaku,  respectively,  and are not within the control
of the Company.  Further,  the capability of  Warner-Lambert or Nippon Kayaku to
achieve such milestones depends upon the availability  and/or  prioritization of
sufficient  funding to support necessary testing of DENSPM,  the availability of
trained and experienced staff for testing and the results of such testing, among
other factors.  As a result,  no assurance can be made that such milestones will
be  achieved  or  that  such  payments  will be  received  by the  Company.  See
"Strategic Alliances".

         The Company  will require  significant  levels of  additional  capital,
which  it  intends  to  raise  through  additional  equity  or  debt  financing,
additional  arrangements  with corporate  partners,  or from other  sources.  No
assurance  can be given  that the  necessary  funds  will be  available  for the
Company to finance its  development  on acceptable  terms or at all. If adequate
funds are not available from operations or additional sources of financing,  the
Company's  business will be  materially  and  adversely  affected.  See "Item 6.
Management's  Discussion  and  Analysis of  Financial  Condition  and Results of
Operations."

         GOVERNMENT REGULATION; NO ASSURANCE OF REGULATORY APPROVAL

         Research,   preclinical   development,   clinical   trials,   and   the
manufacturing  and marketing of therapeutic  products  under  development by the
Company  are  subject  to  extensive  and  rigorous   regulation  by  government
authorities in the United States and other countries, including, but not limited
to, the FDA. In order to obtain approval to commercialize a product, the Company
must  demonstrate to the  satisfaction of the FDA and comparable  authorities in
other  countries  that such product is safe and  effective for its intended uses
and that the Company is capable of  manufacturing  the product to the applicable
standards.  In the  United  States,  this  requires  that  the  product  undergo
extensive preclinical testing, that the Company file an IND application with the
FDA prior to commencing human clinical trials,  and that the Company file an NDA
requesting FDA approval for commercial marketing of the product.

         The approval process for the Company's product  candidates is likely to
take  several  years  and  will  involve  significant   expenditures  for  which
additional  financing  will be required.  The cost to the Company of  conducting
human clinical trials for any potential product can vary dramatically based on a
number  of  factors,  including  the order and  timing of  clinical  indications
pursued  and the extent of  development  and  financial  support,  if any,  from
corporate partners.  Although Phase I and Phase II clinical trials of DENSPM and
DEHOP have been or are  presently  being  conducted,  further  clinical  trials,
including large,  time-consuming and more costly Phase II and Phase III clinical
trials,  will be  required  to  demonstrate  the  safety and  efficacy  of these
compounds.  There can be no  assurance  that the  Company  will have  sufficient
resources to complete the required regulatory review process or that the Company
could survive the inability to obtain,  or delays in obtaining,  such approvals.
Approvals  that may be granted  will be subject to continual  review,  and later
discovery of  previously  unknown  problems may result in withdrawal of products
from the market.  Failure to comply with the applicable regulatory  requirements
can, among other things, result in fines,


                                     -13-
<PAGE>

suspensions of regulatory approvals, product recalls, operating restrictions and
criminal   prosecution.   Further,   additional  government  regulation  may  be
established  that could  prevent or delay  regulatory  approval of the Company's
products.  See "-Government Regulation."

         DEPENDENCE ON EXCLUSIVE LICENSE

         All of the Company's development and  commercialization  rights for its
products  are  derived  from its  license  agreement  with the  Foundation.  The
Company's  rights under the license  agreement are subject to early  termination
under  certain  circumstances,  including  failure  to pay  royalties  or  other
material  breach by the  Company,  bankruptcy  of the  Company or failure by the
Company to carry on its  business,  failure to commence  marketing of a licensed
product  within six months of approval in any  specific  market,  and failure to
comply with the terms of the Company's  sponsored  research  agreement  with the
University  of Florida,  among others.  In the event that the license  agreement
terminates for any reason,  the Company's rights to manufacture and market DEHOP
and DENSPM and its other  potential  products  would  terminate.  See "CLicensed
Technology and Sponsored Research."

         LIMITED  PERSONNEL;   RELIANCE  ON  STRATEGIC  ALLIANCES;  RELIANCE  ON
         COLLABORATIVE ARRANGEMENTS FOR RESEARCH AND DEVELOPMENT

         SunPharm has eight full-time  employees and one part-time  employee and
is  substantially  dependent on third parties,  with all of the risks  attendant
thereto, to conduct research and development,  to conduct clinical trials of the
Company's  potential  products,  and to  manufacture  DEHOP,  DENSPM  and  other
compounds for such  research and  development.  See  "-Licensed  Technology  and
Sponsored Research" and "-Strategic Alliances."

         The Company is dependent on the  University of Florida and Dr.  Raymond
Bergeron, the inventor of the Company's technology, with respect to all research
and most of the early  preclinical  development of its potential  products.  The
Company has no control over the  facilities  where the research and  development
work is being  performed  or over the  personnel  performing  such work.  If the
University of Florida  breaches its  obligations  under its  agreement  with the
Company,  the  Company's  remedies may be limited by  applicable  law  affecting
actions against state agencies.

         The  Company   benefits   significantly   from  and  is   dependent  on
collaborative  arrangements  with the  University  of Florida and Dr.  Bergeron.
Although the Company believes that its relationships  with its collaborators are
good,  there can be no  assurance  that the  Company's  relationships  with such
institutions  and  individuals  will continue.  The loss of these  relationships
would significantly increase the Company's expenses and could have a substantial
negative effect on the Company's ability to attain its long-range objectives. In
addition,  the loss of Dr.  Bergeron's  services  could have a material  adverse
effect on the Company.

         The Company is dependent on strategic alliances with Warner-Lambert and
Nippon Kayaku with respect to the development and  commercialization  of DENSPM,
and  expects to rely on future  strategic  alliances  with other  pharmaceutical
companies  with  respect  to other  potential  products.  Although  the  Company
believes that Warner- Lambert,  Nippon Kayaku and any future strategic  alliance
partners have or will have an economic  motivation to develop and  commercialize
such  products,  the  amount  and  timing of  resources  to be  devoted to these
activities  are not within the control of the Company and will be subject to the
priorities of such strategic  alliance  partners in allocating  these resources,
which  may  not be  consistent  with  the  best  interests  of the  Company.  No
assurances can be given that the Company's  agreements with  Warner-Lambert  and
Nippon Kayaku,  or with any other  strategic  alliances the Company may enter in
the future, will result in the successful  development or  commercialization  of
DENSPM or other


                                      -14-
<PAGE>

potential  products,  or that any such agreements will result in any significant
revenues, profits or cost savings to the Company. Furthermore, no assurances can
be given that the Company will be able to enter into future  strategic  alliance
agreements on favorable  terms or at all. In addition,  the Company's  strategic
alliance  partners or their affiliates may be pursuing  alternative  products or
technologies which may compete with the Company's products and technologies. See
"-Strategic Alliances."

         UNCERTAINTIES AS TO PATENTS AND PROPRIETARY TECHNOLOGIES

         Subject  to a  nonexclusive  statutory  license  to the  United  States
government,  the Company is the exclusive licensee of more than 41 issued United
States and foreign patents and numerous pending patent applications. The Company
is required to meet specified  milestone and diligence  requirements in order to
retain its license to the patents and other proprietary rights licensed from the
Foundation. No assurance can be given that the Company will satisfy any of these
requirements.

         The patent  position of  pharmaceutical  companies  generally is highly
uncertain  and involves  complex  legal and factual  questions.  There can be no
assurance that the patents licensed from the Foundation will provide substantial
protection or  commercial  benefit to the Company,  afford the Company  adequate
protection from competing products,  or not be challenged or declared invalid or
that  additional  related United States or foreign  patents will be issued,  the
occurrence of any of which could have a material adverse effect on the Company's
operations. The United States government could use its rights as licensee of the
Foundation's patents to increase the supply of products based on such patents or
to reduce the cost of treatment with such products.

         Certain proprietary trade secrets and unpatented know-how are important
to the  Company.  There can be no  assurance  that others may not  independently
develop the same or similar  technologies.  Although the Company has taken steps
to protect its trade secrets and unpatented know-how,  third parties nonetheless
may gain access to such information.

         There  has  been  significant   litigation  in  the  biotechnology  and
pharmaceutical  industry regarding patents and other proprietary  rights. If the
Company  became  involved  in  similar  litigation  regarding  its  intellectual
property rights, the cost of such litigation could be substantial. See "-Patents
and Proprietary Technology."

         UNCERTAINTY OF HEALTH CARE REFORM MEASURES AND THIRD PARTY
         REIMBURSEMENT

         The Company's  ability to successfully  commercialize  its products may
depend  in part on the  extent  to  which  reimbursement  for the  costs of such
products  and  related  treatments  will be  available  from  government  health
administration   authorities,   private  health  coverage   insurers  and  other
organizations.  While the Company cannot predict whether any future  legislative
or  regulatory  proposals to reform the health care system may be adopted,  such
proposals could have a material adverse effect on the Company's ability to raise
capital.  Any such reform  measures,  if  adopted,  could  adversely  affect the
pricing  of  therapeutic  products  in  the  United  States  or  the  amount  of
reimbursement  available from United States governmental agencies or third party
insurers  and  could  materially   adversely  affect  the  Company  in  general.
Furthermore,  the  Company's  ability to  commercialize  its  potential  product
portfolio  may be adversely  affected to the extent that such  proposals  have a
material adverse effect on the business,  financial  condition and profitability
of other  companies  that  are  prospective  collaborators  for  certain  of the
Company's proposed products.

         In both domestic and foreign markets,  sales of the Company's  proposed
products  will  depend  in  part  on  the  


                                      -15-
<PAGE>

availability of reimbursement  from third-party payors such as government health
administration  authorities,  private health  insurers and other  organizations.
Third-party payors are increasingly challenging the price and cost effectiveness
of medical  products  and  services.  Significant  uncertainty  exists as to the
reimbursement  status of newly approved  health care  products.  There can be no
assurance that the Company's proposed products will be considered cost effective
or that  adequate  third-party  reimbursement  will be  available  to enable the
Company to maintain price levels sufficient to realize an appropriate  return on
its investment in product development. Legislation and regulations affecting the
pricing of  pharmaceuticals  may change  before  any of the  Company's  proposed
products are approved for marketing. Adoption of such legislation or regulations
could  further  limit  reimbursement  for medical  products  and  services.  See
"Government Regulation."

         PRODUCT LIABILITY EXPOSURE; LIMITED INSURANCE COVERAGE

         The testing,  marketing and sale of  pharmaceutical  products entails a
risk of product  liability claims by consumers and others and such claims may be
asserted against the Company.  The Company  currently  maintains $2.0 million of
product liability  insurance  coverage for clinical trials currently underway or
expected to commence in 1998. There can be no assurance that the Company will be
able to obtain additional insurance at a reasonable cost sufficient to cover all
possible  liabilities.  In the  event of a  successful  product  liability  suit
against the Company,  lack or insufficiency  of insurance  coverage could have a
material  adverse  effect on the  Company.  Further,  the Company is required to
indemnify the  University of Florida and its trustees,  officers,  employees and
affiliates  against claims  resulting  from the  manufacture or sale of products
derived from its  polyamine  compounds  and to have product  liability  coverage
naming the University of Florida as an additional insured for such risks.

         LACK OF MANUFACTURING EXPERIENCE OR FACILITIES

         The Company  currently  contracts with third parties for the production
of compounds in limited  quantities for its  preclinical and clinical trials and
currently  does not possess the staff or  facilities  necessary  to  manufacture
products in  commercial  quantities.  The Company has entered  into  agreements,
however,  for the  production  of  clinical-scale  quantities of its products by
third party  contractors  which it believes  capable of supplying its short-term
requirements.  There can be no assurance  that the  polyamine  compounds or iron
chelators  can be  manufactured  by the Company or its suppliers at a cost or in
quantities  necessary to make such compounds  commercially viable products.  The
Company  also may  encounter  significant  delays  in  obtaining  supplies  from
third-party  manufacturers or experience  interruptions in its supplies.  If the
Company is unable to obtain adequate supplies,  its business would be materially
adversely affected.

         RELIANCE ON FOUNDER AND INVENTOR

         The Company is highly dependent on Stefan Borg, its founder,  President
and Chief Executive  Officer,  and on Dr. Raymond Bergeron,  the inventor of the
Company's polyamine analogues and metal chelators. See "Employees" and "Research
Agreement".

         COMPETITION

         The Company has numerous  competitors,  including major  pharmaceutical
and chemical companies,  specialized biotechnology firms, universities and other
research  institutions.  The competitors may succeed in developing  technologies
and products that are more effective  than those being  developed by the Company
or which


                                      -16-
<PAGE>

would render the Company's  technology and products obsolete and noncompetitive.
Many of these  competitors have  substantially  greater  financial and technical
resources  and  production  and  marketing  capabilities  than the  Company.  In
addition,   many  of  the  Company's   competitors  have  significantly  greater
experience than the Company in preclinical  testing and human clinical trials of
new  or  improved  pharmaceutical  products  and  in  obtaining  FDA  and  other
regulatory approvals of products for use in health care.

ITEM 2.  DESCRIPTION OF PROPERTY.

         The Company  leases its  executive  offices in  Jacksonville,  Florida.
totaling   approximately  2,400  square  feet,  at  a  current  annual  rent  of
approximately $48,000. The lease expires in September 1998 and is not renewable.
In January 1998, the Company signed a lease for approximately  5,000 square feet
of office space in Ponte Vedra Beach,  Florida,  commencing in September 1998 at
an annual rent of  approximately  $110,000.  The Company  also leases 470 square
feet of  laboratory  space at the Sid  Martin  Biotechnology  Institute  for the
purpose  of  analytical  testing.   The  Company's  sponsored  research  at  the
University of Florida is conducted at laboratory facilities on the University of
Florida campus in Gainesville.

ITEM 3.  LEGAL PROCEEDINGS.

         The  Company  is a party to claims  arising in the  ordinary  course of
business but does not believe that any such claims will have a material  adverse
effect on its financial condition or results of operations.

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

         Not Applicable.


                                      -17-
<PAGE>

                                     PART II

ITEM 5.  MARKET FOR COMMON EQUITY AND RELATED STOCKHOLDER MATTERS.

         The Company's Units, Common Stock and Warrants are traded on the Nasdaq
SmallCap Market under the symbols "SUNPU," "SUNP" and "SUNPW," respectively. The
following table presents quarterly information on the price ranges of the Units,
Common Stock and  Warrants.  This  information  indicates the high and low sales
price reported by the Nasdaq SmallCap Market for the periods indicated.

<TABLE>
<CAPTION>
                                                 1996                   1997
                                                 ----                   ----
                                          HIGH         LOW        HIGH         LOW
                                          ----         ---        ----         ---
First Quarter
- -------------
<S>                                    <C>         <C>         <C>         <C>     
        Units                          $   8.38    $   7.88    $   5.44    $   4.25
        Common Stock                       7.50        6.38        5.50        3.75
        Warrants                           1.75        1.06        0.84        0.38

Second Quarter
- --------------
        Units                          $   8.00    $   7.00    $   4.38    $   2.88
        Common Stock                       7.25        6.38        4.63        2.63
        Warrants                           1.50        0.50        0.44        0.25

Third Quarter
- -------------
        Units                          $   6.88    $   6.00    $   3.88    $   3.00
        Common Stock                       6.38        5.38        4.06        2.63
        Warrants                           0.88        0.50        0.41        0.25

Fourth Quarter
- --------------
        Units                          $   6.25    $   5.38    $   6.25    $   3.50
        Common Stock                       6.00        4.94        6.25        3.63
        Warrants                           0.88        0.50        0.53        0.13
</TABLE>

         At March 20, 1998,  the  Company's  shares of Common Stock and Warrants
were held by 122 and 2 holders of record,  respectively,  and  approximately 700
beneficial owners.

         SunPharm is a development-stage  company,  has not paid a cash dividend
to its  stockholders,  and does not  anticipate  paying  cash  dividends  in the
foreseeable  future. The declaration and payment of cash dividends in the future
will be at the  discretion  of the  Board of  Directors  and will  depend on the
Company's earnings,  financial condition, capital needs and other factors deemed
pertinent  by the Board of  Directors,  including  limitations,  if any,  on the
payment of dividends under state law and any then-existing credit agreement.

ITEM 6.  RECENT SALES OF UNREGISTERED SECURITIES

         The Company did not sell any unregistered  securities during the fourth
quarter of the Company's fiscal year ended December 31, 1997.


                                      -18-
<PAGE>

ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
         OF OPERATIONS.

OVERVIEW

         Since its inception in May 1990, SunPharm has devoted substantially all
of its efforts and  resources to research and  development  conducted on its own
behalf and through collaborations with clinical institutions. The Company's drug
development strategy emphasizes  conducting its research and clinical activities
at the  University  of  Florida,  in  conjunction  with its  Sponsored  Research
Agreement  (see  ("Item 1.  Description  of Business - Licensed  Technology  and
Sponsored  Research").  As a  consequence  of  this  relationship,  the  Company
believes  that its research and  development  expenditures  have been lower than
comparable development-stage  pharmaceutical companies. The Company has incurred
cumulative net losses of  $15,503,000  from its inception  through  December 31,
1997.

         In January and February 1995, the Company  completed its initial public
offering which resulted in net proceeds to the Company approximately $7,200,000.
These  proceeds  were  sufficient to finance the  Company's  operations  through
mid-1996,  at which time the Company raised $3,095,000 of net proceeds through a
private placement financing and exercise of warrants.  Also in 1996, the Company
recorded a $1,000,000 milestone payment from Warner-Lambert.  In March 1997, the
Company  raised an  additional  $6,116,500  of net proceeds in a second  private
placement.  At the present  time,  the Company  believes  such  proceeds will be
sufficient to fund its operations through the first quarter of 1999, after which
time the Company will require additional financing.

         The  Company  intends  to  obtain  additional  funds for  research  and
development   through   collaborative   arrangements  with  corporate  partners,
additional  financings  and from other  sources.  The  Company  expects to incur
additional  significant  operating  losses for at least the next several  years,
principally as a result of its continuing  anticipated  research and development
and clinical trials expenditures.

RESULTS OF OPERATIONS

YEARS ENDED DECEMBER 31, 1995, 1996, AND 1997

         Revenues  decreased to $280,000 in 1997 from  $1,073,000  in 1996.  The
Company's  1996  revenues  included a  $1,000,000  milestone  payment  under the
Warner-Lambert  agreement for  successful  completion of DENSPM Phase I testing,
whereas the  Company's  1997  revenues  consisted  solely of interest  income on
invested cash.  Revenues for 1996  increased from $163,000 in 1995 which,  as in
1997,  consisted solely of interest income on invested cash. The Company expects
to receive  sublicensing  revenues of  $500,000 in 1999 from Nippon  Kayaku when
Phase I trials for DENSPM  commence in Japan.  An additional  milestone  payment
from Warner-Lambert is also possible during this period.

         The Company  reported a net loss in 1997 of $3,906,000,  which compares
with net losses of  $2,837,000 in 1996 and  $4,370,000 in 1995.  The net loss in
1997 increased by $1,069,000 from 1996 due to decreased  revenues,  as discussed
above,  and higher expenses as discussed below.  Similarly,  1995's net loss was
impacted by lower revenues and significantly  higher general and  administrative
expenses, as discussed below.

         The  Company's  research  and  development  expenses  increased 8% from
$2,228,000 in 1996 to $2,417,000 in

                                      -19-
<PAGE>

1997.  These  expenses  consist  principally  of  expenditures  for research and
development  conducted by Dr. Bergeron at the University of Florida for compound
screening,  toxicology  and other  tests,  expenses  related  to human  clinical
trials, license payments to the University of Florida, and salaries and benefits
for the  Company's  employees  who  are  engaged  in  research  and  development
activities.  The higher  expenses in 1997,  as compared  with 1996,  were due to
increased preclinical studies and testing, increased sponsored research payments
made to the University of Florida,  expenses associated with an expanding patent
portfolio,  and expenses  associated  with  establishment  of a quality  control
laboratory.  Research  and  development  expenses for 1996  remained  relatively
unchanged from 1995. The Company expects its research and  development  expenses
to  increase  during  1998 and 1999,  reflecting  anticipated  increases  in the
funding of research  activities,  preclinical studies and human clinical trials,
and in anticipation of adding regulatory personnel to its management team.

         General  and   administrative   expenses   increased  26%  in  1997  to
$1,769,000.  Contributing significantly to this increase were salaries, benefits
and  personnel  recruiting  expenses  associated  with  the  addition  of  three
management  positions,  beginning in September  1996.  The Company also incurred
generally  higher costs in 1997 for investor  relations and for costs associated
with being a public company.  In 1996, these expenses were sharply lower than in
1995,  which included  amortization of $775,000 of issuance  costs,  $600,000 of
which  was  non-cash,  incurred  in  connection  with the 1994  issuance  of 10%
Convertible Secured Notes, as well as legal fees incurred in connection with the
Company's  litigation with Dean L. Rider,  M.D., which settled in June 1996. The
Company expects its general and administrative  expenses to increase during 1998
and 1999,  primarily with the anticipated  growth of its marketing  function and
associated administrative support.
         In  1996,   the  Company   incurred   royalty   expenses  of  $280,000,
representing 28% of the $1,000,000 milestone payment from Warner-Lambert payable
to UFRFI.

LIQUIDITY AND CAPITAL RESOURCES

         Since its inception,  the Company has financed its operations primarily
through  collaborative  research and  sublicense  agreements  with its strategic
alliance  partners  and the  issuance  of debt and  equity  securities.  Through
December 31, 1997, the Company had received  $2,885,000 of cumulative  sponsored
research  and   sublicensing   revenues   and   approximately   $19,687,000   in
consideration of the issuance of debt and equity securities.

         On January 12, 1995, the Company  completed an initial public  offering
(the "IPO") of 1,100,000  units ("Unit") at $7.00 per Unit.  Each Unit consisted
of one share of the  Company's  Common  Stock and one  Redeemable  Common  Stock
Purchase Warrant ("Warrant"), which entitled the holder to purchase one share of
Common  Stock at $8.75 per  share.  The  Warrants,  which  were due to expire on
January 12, 1998,  three years after issuance,  were extended to April 13, 1998.
Additionally,  on February  16,  1995, a  representative  of Royce  Investments,
Underwriters in the IPO, (the "Representative")  exercised an option to purchase
an  additional  165,000  Units at $7.00  per  Unit.  Proceeds  from the IPO were
approximately  $7,200,000  of  cash,  net of  underwriting  and  other  costs of
$1,655,000.  Of such net proceeds, the Company used approximately  $1,793,000 to
repay its  outstanding  indebtedness  (including  accrued  interest  and certain
fees).

         During the year ended  December 31,  1996,  the Company  completed  the
private  placement of 537,623 units (the "1996 Units")  pursuant to Section 4(2)
of the Securities Act of 1933, as amended (the "Act"), for $5.50 per unit. Each

                                      -20-
<PAGE>

1996  unit  consisted  of one  share  of the  Company's  Common  Stock  and  one
redeemable  Common Stock  Purchase  Warrant.  The warrants  included in the 1996
Units  expire four years from the date of issuance and have  exercise  prices of
$5.50 per share  until the first  anniversary  date,  $6.50 per share  until the
second  anniversary  date,  and $7.50 per share  thereafter.  Additionally,  the
warrants  included in the 1996 Units are subject to redemption by the Company at
$0.01 per  warrant,  provided  the  Company's  Common Stock closes at a price of
$8.50,  $9.50 or $10.50 per share for 20  consecutive  days  during the  second,
third or fourth years,  respectively,  of the term of the warrant. Proceeds from
the private placement were approximately $2,636,000,  net of placement agent and
other costs of approximately $321,000.

         Also during 1996, the Company offered  certain of its existing  warrant
holders a 30% reduction in their  applicable  exercise  price if they  exercised
their warrants prior to December 31, 1996. Additionally,  for each four warrants
exercised,  participants  were issued a warrant identical to the warrants issued
in the private  placement.  As a result of this warrant exchange offer,  236,721
outstanding  warrants  were  exercised in exchange for 236,721  shares of Common
Stock and 59,178 new warrants.  The Company  received  proceeds from the warrant
exchange  of  approximately  $459,000,  net of offering  costs of  approximately
$34,000.

         On March 28, 1997, the Company sold 1,828,286 units (the "1997 Units"),
each  consisting of one share of the Company's  Common Stock and one  redeemable
Common Stock  Purchase  Warrant (the "1997  Warrants")  for $3.50 per Unit.  The
Warrants included in the 1997 Units expire five years from the date of issuance.
In case of a "cashless  exercise," the 1997 Warrant  exercise price is $4.00 per
share plus forty percent of the difference  between the current trading price of
the  Company's  common  stock and $4.00;  in all other  cases,  the 1997 Warrant
exercise price is $4.00 per share plus thirty percent of the difference  between
the current trading price of the Company's  common stock and $4.00. The Warrants
are subject to  redemption  at the exercise  price by the Company,  provided the
Company's common stock closes at a price of $16.00,  $20.00,  $24.00,  or $28.00
per share for twenty consecutive days during the second,  third, fourth or fifth
years, respectively,  of the term of the 1997 Warrant. Proceeds from the private
placement were  $6,116,500,  net of placement  agent and other offering costs of
$282,500.  During the nine months ended  December 31, 1997,  the Company sold an
additional  120,000  1997  Units  and  received  proceeds  of  $378,000,  net of
placement costs of $42,000.

         On March 28, 1997, the Company, subject to exercise by an investor of a
warrant  amendment  agreement,  amended the terms of the warrants  issued in the
private  placement  of 537,623  units and in the warrant  exchange  resulting in
59,178 new warrants,  to provide that (i) the warrant exercise price was reduced
to $3.00 per share,  (ii) the price of common  stock of the Company at which the
Company  can  exercise  the  call  feature  was  increased,  (iii)  the  warrant
expiration  date was extended to March 31, 2001,  and (iv) the Company would use
reasonable best efforts to register the resale of shares by June 30, 1997.
         During the year ended  December  31,  1997,  net cash used in operating
activities was $4,062,228,  as compared with  $2,604,413  during the prior year.
The higher  usage of cash by the  Company in 1997 was due to the larger net loss
and a reduction of accrued  liabilities.  The Company had net working capital of
approximately  $4,045,000  at December  31, 1997,  but will require  substantial
funds to continue  preclinical  testing  and  clinical  trials of its  potential
products.  The Company believes,  therefore,  that its currently  available cash
will satisfy its operating needs through mid the first quarter of 1999.

         The  Company  expects  to incur  substantial  additional  research  and
development  expenses,  including expenses associated with preclinical  studies,
clinical trials and  manufacturing.  The Company intends to use a portion of its
cash resources, together with funds from its existing collaborative arrangements
with  Warner-Lambert  and  Nippon  Kayaku,  for  these  purposes;  however,  the
Company's rights to receive payments from  Warner-Lambert  and Nippon Kayaku are

                                      -21-
<PAGE>

dependent  upon the  achievement  of certain  milestones by  Warner-Lambert  and
Nippon Kayaku,  respectively,  and are not within the control of the Company. No
assurance  can be made  that  such  milestones  will be  achieved  or that  such
payments  will be  received  by the  Company.  The  Company  intends  to  obtain
additional  funds  for  research  and  development   through  new  collaborative
arrangements  with corporate  partners,  additional  financings,  and from other
sources;  however,  there can be no  assurance  that the Company will be able to
obtain necessary financing when required or what the terms of any financing,  if
obtained,  might be.  Accordingly,  there can be no assurance  of the  Company's
future  success.  In addition,  the Company's  future success is affected by the
progress of the  Company's  research and  development,  the scope and results of
preclinical  studies  and  clinical  trials,  the cost and timing of  regulatory
approvals,  the  rate  of  technological  advances,  determinations  as  to  the
commercial potential of the Company's products under development,  the status of
competitive products, the establishment of manufacturing capacity or third-party
manufacturing arrangements,  its reliance on research institutions and corporate
partners, the uncertainty of health care reform and the competitive  environment
in which the Company operates. The Company's existing capital resources will not
be sufficient to fund the Company's operations to the point of introduction of a
commercially  successful  product,  if and when  that  time  should  arrive.  No
assurance  can be given that  additional  funds will be available on  acceptable
terms, if at all.

         The Company has incurred losses since inception and, therefore, has not
been subject to federal  income taxes.  As of December 31, 1997, the Company had
net operating loss ("NOL") and tax credit  carryforwards for income tax purposes
of approximately $13,327,000 and $464,000,  respectively, which may be available
to reduce future taxable income and future tax liabilities.  These carryforwards
begin to expire  in 2008.  The Tax  Reform  Act of 1986  provides  for an annual
limitation  on the  use of  NOL  and  credit  carryforwards  (following  certain
ownership  changes)  that could  significantly  limit the  Company's  ability to
utilize these  carryforwards.  The Company has made no determination  concerning
whether  there has been such a cumulative  change in  ownership.  It is possible
that  such a change  in  ownership  occurred  following  the  completion  of the
Company's  IPO,  subsequent  private  placements,  and  subsequent  exercise  of
warrants.  Accordingly,  the  Company's  ability to utilize  the  aforementioned
carryforwards  to  reduce  future  taxable  income  and tax  liabilities  may be
limited.  Additionally,  because  United  States tax laws limit the time  during
which these  carryforwards  may be applied against future taxes, the Company may
not be able to take full  advantage of these  attributes  for federal income tax
purposes.

ITEM 8.  FINANCIAL STATEMENTS.

         The  financial  statements  and  supplementary   financial  information
required to be filed under this Item are  presented on pages F-1 through F-19 of
this Annual Report on Form 10-KSB, and are incorporated herein by reference.

ITEM 9.  CHANGES  IN  AND  DISAGREEMENTS  WITH  ACCOUNTANTS  ON  ACCOUNTING  AND
         FINANCIAL DISCLOSURE.

         On January 23, 1996,  the Company filed a report on Form 8-K disclosing
a change in  independent  accountants  from  Arthur  Andersen  LLP to Deloitte &
Touche LLP.

                                      -22-
<PAGE>

                                    PART III

ITEM 9.  DIRECTORS,   EXECUTIVE   OFFICERS,   PROMOTERS  AND  CONTROL   PERSONS;
         COMPLIANCE WITH SECTION 16(A) OF THE EXCHANGE ACT.

         The information required by this item as to the directors and executive
officers of the Company is hereby incorporated by reference from the information
appearing under the captions "Election of Directors,"  "Executive  Compensation"
and "Compliance with Section 16(a)" in the Company's  definitive proxy statement
which  involves the election of directors and is to be filed with the Securities
and Exchange Commission  ("Commission")  pursuant to the Securities Exchange Act
of 1934,  as  amended  (the  "Exchange  Act")  within 120 days of the end of the
Company's fiscal year ended December 31, 1997.

ITEM 10. EXECUTIVE COMPENSATION.

         The  information  required  by this  item as to the  management  of the
Company is hereby incorporated by reference from the information appearing under
the captions "Executive Compensation" and "Election of Directors-Compensation of
Directors"  in the  Company's  definitive  proxy  statement  which  involves the
election of  directors  and is to be filed with the  Commission  pursuant to the
Exchange  Act  within  120 days of the end of the  Company's  fiscal  year ended
December 31, 1997.

ITEM 11. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT.

         The information required by this item as to the ownership by management
and others of securities of the Company is hereby incorporated by reference from
the  information  appearing  under the caption  "Security  Ownership  of Certain
Beneficial  Owners and Management" in the Company's  definitive  proxy statement
which  involves the election of directors and is to be filed with the Commission
pursuant to the Exchange Act within 120 days of the end of the Company's  fiscal
year ended December 31, 1997.

ITEM 12. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS.

         The  information   required  by  this  item  as  to  certain   business
relationships  and transactions with management and other related parties of the
Company is hereby incorporated by reference from the information appearing under
the captions "Certain  Relationships and Related  Transactions" in the Company's
definitive proxy statement which involves the election of directors and is to be
filed with the  Commission  pursuant to the  Exchange Act within 120 days of the
end of the Company's fiscal year ended December 31, 1997.

ITEM 13. EXHIBITS AND REPORTS ON FORM 8-K.

         (a)   Exhibits


       Exhibit
         No.                           Description
       -------                         -----------    

         3.1  --    Certificate of  Incorporation  (incorporated by reference to
                    Exhibit 3.1 to the Company's


                                      -23-
<PAGE>

       Exhibit
         No.                          Description
       -------                        -----------    

                    Registration  Statement  on  Form  SB-2)  (Registration  No.
                    33-85416-A)(the "Registration Statement")).

          3.2  --   Bylaws  (incorporated  by  reference  to Exhibit  3.2 to the
                    Company's Registration Statement).

          4.1  --   Specimen Common Stock Certificate (incorporated by reference
                    to  Exhibit  4.1  to  Amendment   No.  2  to  the  Company's
                    Registration Statement).

          4.2  --   Revised  Form of Warrant  Agreement  relating to  Redeemable
                    Common Stock Purchase Warrants (incorporated by reference to
                    Exhibit 4.2 to Amendment No.3 to the Company's  Registration
                    Statement).

          4.4  --   Investment   Agreement  between  the  Company  and  SunPharm
                    Investors,  L.P.,  Quarterly  Report on Form  10-QSB for the
                    fiscal  quarter  ended  June 30,  1997 (the  "June 1997 Form
                    10-QSB")  dated January 11, 1993,  relating to the Company's
                    9.5%  Extendable   Notes  and  Warrants   (incorporated   by
                    reference  to  Exhibit  4.4  to the  Company's  Registration
                    Statement).

          4.5  --   Revised  form  of  Unit  Purchase  Option  issued  to  Royce
                    Investment Group, Inc. (incorporated by reference to Exhibit
                    4.5  to  Amendment  No.  3  to  the  Company's  Registration
                    Statement).

          4.6  --   Unit Purchase  Agreement  dated March 28, 1997,  between the
                    Company and several purchasers name therein (incorporated by
                    reference to Exhibit 4.1 to the Company  Quarterly Report on
                    Form  10-QSB for fiscal  quarter  ended  March 30, 1997 (the
                    "March 1997 Form 10-QSB")).

          4.7  --   Warrant Agreement dated March 28, 1997,  between the Company
                    and  several  purchasers  named  therein   (incorporated  by
                    reference  to Exhibit 4.2 to the  Company's  March 1997 Form
                    10-QSB).

         10.1  --   Patent  License   Agreement  between  the  Company  and  the
                    University  of  Florida  Research  Foundation,   Inc.  dated
                    December 9, 1991, as amended by the First Amendment  thereto
                    dated December 30, 1992 and the Second Amendment dated March
                    26, 1993  (incorporated  by reference to Exhibit 10.1 to the
                    Company's Registration Statement).

         10.2  --   Corporate  Research  Agreement  between  the Company and the
                    University of Florida Research Foundation,  Inc. dated April
                    30, 1993,  as amended by the First  Amendment  dated May 16,
                    1994  (incorporated  by  reference  to  Exhibit  10.2 to the
                    Company's Registration Statement).

                                      -24-
<PAGE>

     Exhibit
        No.                        Description
      -------                      -----------    

         10.3  --   Sublicense  Agreement between the Company and Warner-Lambert
                    Company  dated May 1, 1993  (incorporated  by  reference  to
                    Exhibit 10.3 to the Company's Registration Statement).

         10.4  --   Exclusive  Sublicense  Agreement  between  the  Company  and
                    Nippon   Kayaku   Co.,   Ltd.   dated   February   28,  1994
                    (incorporated  by reference to Exhibit 10.4 to the Company's
                    Registration Statement).

         10.5  --   Amended and restated 1994 Stock Option Plan (incorporated by
                    reference to Exhibit 10. 1 to the Company's Quarterly Report
                    on Form  10-QSB for the fiscal  quarter  ended June 30, 1997
                    (the "June 1997 Form 10-QSB")).

         10.6  --   Employment Agreement between the Corporation and Stefan Borg
                    dated April 1, 1993  (incorporated  by  reference to Exhibit
                    10.6 to the Company's Registration Statement).

         10.7  --   Stock  Appreciation  Rights Agreement between the Registrant
                    and Craig Siegler dated August 1,

                    1994  (incorporated  by  reference  to  Exhibit  10.7 to the
                    Company's Registration Statement).

         10.8  --   Stock  Purchase  Warrant  between the  Registrant  and Craig
                    Siegler dated August 18, 1994  (incorporated by reference to
                    Exhibit 10.8 to the Company's Registration Statement).

         10.9  --   Consulting  Agreement between the Company and Dr. Raymond J.
                    Bergeron dated December 9, 1991, as amended by letters dated
                    April 2, 1993 and April 29, 1994  (incorporated by reference
                    to Exhibit 10. 9 to the Company's Registration Statement).

        10.10  --   Form  of  Bridge  Warrant   Certificate   (incorporated   by
                    reference  to Exhibit  10.10 to the  Company's  Registration
                    Statement).

        10.11  --   Form  of   Subscription   Agreement  for  Bridge   Financing
                    (incorporated by reference to Exhibit 10.13 to the Company's
                    Registration Statement).

        10.12  --   Second Amended and Restated  Registration  Rights  Agreement
                    (incorporated by reference to Exhibit 10.14 to the Company's
                    Registration Statement).

        10.13  --   Agency Agreement between the Registrant and Royce Investment
                    Group, Inc. dated August 12, 1994 (incorporated by reference
                    to Exhibit 10.15 to the Company's Registration Statement).

        10.14  --   First Amendment to Second Amended and Restated  Registration
                    Rights Agreement (incorporated by reference to Exhibit 10.16
                    to Amendment No. 1 to the Company's Registration Statement).

        10.15  --   Third  Amendment  to Patent  License  Agreement  between the
                    Company and the University of Florida  Research  Foundation,
                    Inc.   (incorporated   by  reference  to  Exhibit  10.17  to
                    Amendment No. 1 to the Company's Registration Statement).

        10.16  --   License  Agreement between the Company and the University of
                    Florida  Research  Foundation,  Inc.  dated October 23, 1995
                    (incorporated by reference to Exhibit 10.16 to the Company's
                    Annual Report on Form 10-KSB for the year ended December 31,
                    1995).

                                      -25-
<PAGE>

     Exhibit
        No.                        Description
      -------                      -----------    

        10.17  --   SunPharm  Corporation  Amended and Restated 1995 Nonemployee
                    Directors'  Stock Option Plan  (incorporated by reference to
                    Exhibit 10.2 to the Company's June 1997 Form 10-QSB).

        10.18  --   Form   of   Redeemable   Common   Stock   Purchase   Warrant
                    (incorporated  by reference to Exhibit 4.2 to the  Company's
                    Quarterly  Report  on  Form  10-QSB  for the  quarter  ended
                    September 30, 1996 (the "September 1996 Form 10-QSB")).

        10.19  --   Form of  Subscription  Agreement  relating  to 1996  Private
                    Placement of Units consisting of Common Stock and Redeemable
                    Common Stock Purchase Warrants (incorporated by reference to
                    Exhibit 4.1 to the Company's ( "September 1996 Form 10-QSB).

        10.20  --   Fourth  Amendment to Patent  License  Agreement  between the
                    Company and the University of Florida  Research  Foundation,
                    Inc. effective September 9, 1996. *

        10.21  --   Lock-up  Agreement  between  University of Florida  Research
                    Foundation,  Inc.  and  members  of  Board of  Directors  of
                    Company effective is December 31, 1996. *

        10.22  --   Fifth  Amendment  to Patent  License  Agreement  between the
                    Company and the University of Florida  Research  Foundation,
                    Inc. dated December 26, 1997. *

        11.1   --   Statement regarding computation of loss per share. *

        16.1   --   Letter  from  Arthur   Andersen  LLP  regarding   change  in
                    accountants  (incorporated  by reference to Exhibit attached
                    to the Company's  current  report on Form 8-K filed with the
                    Securities and Exchange Commission on January 23, 1996).

        27.1   --   Financial Data Schedule. *


* Filed herewith.

          (b)       Reports on Form 8-K.


                                      -26-
<PAGE>

                                   SIGNATURES

         In accordance with Section 13 or 15(d) of the Exchange Act, the Issuert
caused this report to be signed on its behalf by the undersigned, thereunto duly
authorized.

                                SUNPHARM CORPORATION


                                By:  /s/ STEFAN BORG
                                      ------------------------------------------
                                         Stefan Borg
                                         President and Chief Executive Officer

                                Date:    MARCH 30 , 1998
                                      ------------------------------------------

         In accordance  with the Exchange Act, this report has been signed below
by the following  persons on behalf of the Issuer and in the  capacities  and on
the dates indicated.


Date:  March 30, 1998                 /s/ STEFAN BORG
                                      ------------------------------------------
                                          Stefan Borg,
                                          President and 
                                          Chief Executive Officer
                                         (Principal Executive Officer)


Date:  March 30, 1998                 /s/ PAUL M. HERRON
                                      ------------------------------------------
                                          Paul M. Herron,
                                          Vice President and
                                          Chief Financial Officer
                                         (Principal Financial and 
                                          Accounting Officer)

Date:  March 30, 1998                 /s/ PHILIP R. TRACY
                                      ------------------------------------------
                                          Philip R. Tracy, 
                                          Chairman of the Board of Directors

Date:  March 30, 1998                 /s/ CHARLES L. DIMMLER, III
                                      ------------------------------------------
                                          Charles L. Dimmler, III,
                                          Director

Date:  March 30, 1998                 /s/ JERRY  T. JACKSON
                                      ------------------------------------------
                                          Jerry T. Jackson, 
                                          Director


                                      -27-
<PAGE>

Date:  March 30, 1998                 /s/ 
                                      ------------------------------------------
                                          Robert S.  Janicki, 
                                          Director

Date:  March 30, 1998                                        
                                      /s/ NORMAN LIPOFF
                                      ------------------------------------------
                                          Norman Lipoff, 
                                          Director

Date:  March 30, 1998                 /s/ JAY MOORIN
                                      ------------------------------------------
                                          Jay Moorin,
                                          Director

Date:  March 30, 1998                 /s/ JACQUES F. REJEANGE
                                      ------------------------------------------
                                          Jacques F.  Rejeange,
                                          Director

Date:  March 30, 1998                 /s/ ROBERT A. SCHOELLHORN
                                      ------------------------------------------
                                          Robert A.  Schoellhorn, Director

Date:  March 30, 1998                 /s/ GEORGE B. SCHWARTZ
                                      ------------------------------------------
                                          George B.  Schwartz, Director


                                      -28-
<PAGE>


INDEPENDENT AUDITORS' REPORT


To the Board of Directors and Shareholders of SunPharm Corporation:

We have audited the accompanying balance sheets of SunPharm Corporation (a
development stage company) as of December 31, 1997 and 1996, and the related
statements of operations, stockholders' equity, and cash flows for the years
then ended, and for the period from May 3, 1990 (date of incorporation) to
December 31, 1997. These financial statements are the responsibility of the
Company's management. Our responsibility is to express an opinion on these
financial statements based on our audits. The Company's financial statements for
the period May 3, 1990 (date of incorporation) through December 31, 1994 were
audited by other auditors whose report, dated April 3, 1995, expressed an
unqualified opinion on those statements. The financial statements for the period
May 3, 1990 (date of incorporation) through December 31, 1994 reflect total
revenues and net loss of $1,885,000 and $4,390,367, respectively, of the related
totals. The other auditors' report has been furnished to us, and our opinion,
insofar as it relates to the amounts included for such prior period, is based
solely on the report of such other auditors.

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

In our opinion, based on our audits and the report of other auditors, such
financial statements present fairly, in all material respects, the financial
position of SunPharm as of December 31, 1997 and 1996, and the results of its
operations and its cash flows for the two years then ended, and for the period
from May 3, 1990 (date of incorporation) to December 31, 1997, in conformity
with generally accepted accounting principles.

The Company is in the development stage at December 31, 1997. As discussed in
Note 1 to the financial statements, successful completion of the Company's
development program and ultimately, the attainment of profitable operations is
dependent upon future events, including obtaining adequate financing to fulfill
its development activities, obtaining regulatory approval, and achieving a level
of sales adequate to support the Company's cost structure.



DELOITTE & TOUCHE LLP
Jacksonville, Florida
February 27, 1998


                                      F-1
<PAGE>

SUNPHARM CORPORATION
(A Development Stage Company)

BALANCE SHEETS
DECEMBER 31, 1997 AND 1996
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------

                                                                     1997            1996
ASSETS

<S>                                                              <C>             <C>         
CURRENT ASSETS:
  Cash                                                           $    356,969    $    341,145
  Investments                                                       4,268,566       1,795,312
  Sublicensing fee receivable                                              --         500,000
  Prepaid expenses and other assets                                   206,024         112,066
                                                                 ------------    ------------

          Total current assets                                      4,831,559       2,748,523

RECEIVABLE FROM STOCKHOLDER                                           106,611          10,000

PROPERTY AND EQUIPMENT, net of accumulated
  depreciation of $10,322 and $7,110                                   30,319           9,187

OTHER ASSETS                                                            3,250           3,250
                                                                 ------------    ------------

TOTAL ASSETS                                                     $  4,971,739    $  2,770,960
                                                                 ============    ============


LIABILITIES AND STOCKHOLDERS' EQUITY

CURRENT LIABILITIES:
  Accounts payable                                               $    399,996    $    323,451
  Accrued liabilities                                                 231,754         869,245
  Note payable                                                        155,271         112,201
                                                                 ------------    ------------

          Total current liabilities                                   787,021       1,304,897

COMMITMENTS AND CONTINGENCIES
  (Notes 3, 5, 6, 8 and 10)

STOCKHOLDERS' EQUITY:
  Undesignated serial preferred stock, $.001 par value,
    2,500,000 shares authorized, none issued and outstanding               --              --
  Common stock, $.0001 par value, 25,000,000 shares
    authorized, 5,737,828 and 3,708,879 issued and outstanding            574             371
  Additional paid-in capital                                       19,687,198      13,062,321
  Deficit accumulated during development stage                    (15,503,054)    (11,596,629)
                                                                 ------------    ------------

          Total stockholders' equity                                4,184,718       1,466,063
                                                                 ------------    ------------

TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY                       $  4,971,739    $  2,770,960
                                                                 ============    ============
</TABLE>

The accompanying notes are an integral part of these financial statements.


                                      F-2
<PAGE>

SUNPHARM CORPORATION
(A Development Stage Company)

STATEMENTS OF OPERATIONS
- -----------------------------------------------------------------------------

                                                                PERIOD FROM
                                                                MAY 3, 1990
                                                                 (DATE OF
                                                               INCORPORATION)
                                       YEARS ENDED                   TO
                                       DECEMBER 31,             DECEMBER 31,
                               ----------------------------    ------------
                                   1997            1996             1997

SPONSORED RESEARCH/
  SUBLICENSING REVENUES                  --    $  1,000,000    $  2,885,000

INTEREST INCOME                $    280,045          72,605         515,307
                               ------------    ------------    ------------
          Total revenues            280,045       1,072,605       3,400,307
                               ------------    ------------    ------------

EXPENSES:
  Research and development        2,417,209       2,227,716       9,986,240
  General and administrative      1,769,261       1,401,498       8,427,121
  Royalty                                --         280,000         490,000
                               ------------    ------------    ------------

          Total expenses          4,186,470       3,909,214      18,903,361
                               ------------    ------------    ------------

NET LOSS                       $ (3,906,425)   $ (2,836,609)   $(15,503,054)
                               ============    ============    ============

LOSS PER SHARE: BASIC          $      (0.75)   $      (0.92)
                               ============    ============

SHARES USED IN COMPUTING
  LOSS PER SHARE                  5,214,733       3,085,093
                               ============    ============


The accompanying notes are an integral part of these financial statements.

                                      F-3
<PAGE>

SUNPHARM CORPORATION
(A Development Stage Company)

STATEMENTS OF STOCKHOLDERS' EQUITY
<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------------------------

                                                                                REDEEMABLE CONVERTIBLE
                                                                                    PREFERRED STOCK
                                                                -------------------------------------------------------
                                                                         SERIES A                       SERIES B
                                                                --------------------------         --------------------
                                                                     SHARES         AMOUNT         SHARES       AMOUNT
<S>                                                                   <C>          <C>              <C>       <C> 
  Issuance of common stock for services,
    October 1991 ($.0064 per share)
  Issuance of common stock for license agreement rights,
    December 1991 ($.0064 per share)
  Issuance of common stock for cash, December 1991
    ($.0064 per share)
                                                                     --------      --------        -------    ---------

BALANCE, DECEMBER 31, 1991
  Issuance of Series A for cash, February through
    November 1991 ($1.67 per share)                                   307,500      $513,525
  Issuance of Series B for cash, October through
    December 1992 ($5.00 per share)                                                                 32,500    $ 162,500
  Issuance of common stock for services, October 1992
    ($.32 per share)
  Issuance of Series B for services, December 1992
    ($5.00 per share)                                                                                5,000       25,000
  Net loss
                                                                     --------      --------        -------    ---------

BALANCE, DECEMBER 31, 1992                                            307,500       513,525         37,500      187,500
  Issuance of Series B for cash, April through June 1993
    ($5.00 per share)                                                                               57,500      287,500
  Issuance of Series B for services, June 1993
    ($5.00 per share)                                                                                1,500        7,500
  Issuance of common stock for services, March 1993
    ($.32 per share)
  Issuance of common stock for cash, December 1993
    ($.32 per share)
  Net loss
                                                                     --------      --------        -------    ---------

BALANCE, DECEMBER 31, 1993                                            307,500       513,525         96,500      482,500
  Deferred compensation
  Amortization of deferred compensation
  Exercise of stock options, September 1994 ($.32 per share)
  Issuance of warrants to purchase common stock in
    connection with the Bridge notes ($2.63 per share)
  Net loss
                                                                     --------      --------        -------    ---------

BALANCE, DECEMBER 31, 1994                                            307,500       513,525         96,500      482,500
  Compensation expense
  Conversion of preferred stock to common stock                      (307,500)     (513,525)       (96,500)    (482,500)
  Initial public offering
  Net loss

                                                                     --------      --------        -------    ---------
BALANCE, DECEMBER 31, 1995                                                  -             -              -            -
  Exercise of warrants
  Issuance of common stock
  Issuance of common stock for settlement of litigation
  Net loss
                                                                     --------      --------        -------    ---------

BALANCE, DECEMBER 31, 1996                                                         $                          $
                                                                     ========      ========        =======    =========

</TABLE>
The accompanying notes are an integral part of these financial statements.


                                      F-4
<PAGE>


                                                                     DEFICIT
                                                                   ACCUMULATED
          COMMON STOCK          ADDITIONAL        DEFERRED            DURING
      ---------------------      PAID-IN          DEFERRED         DEVELOPMENT
        SHARES     AMOUNT        CAPITAL        COMPENSATION          STAGE
        ------     ------        -------        ------------          -----

        467,400    $  47      $      2,953

        311,600       31             1,969

        148,010       15               935
      ---------    -----      ------------       ----------        ------------

        927,010       93             5,857





          3,895                      1,250


                                                                   $   (998,004)
      ---------    -----      ------------       ----------        ------------
        930,905       93             7,107                             (998,004)





         31,160        3             9,997

         15,580        2             4,998
                                                                     (1,233,352)
      ---------    -----      ------------       ----------        ------------
        977,645       98            22,102                           (2,231,356)
                                   818,308       $ (818,308)
                                                    818,308
          7,790        1             2,499

                                   600,000
                                                                     (2,159,011)
      ---------    -----      ------------       ----------        ------------
        985,435       99         1,442,909                           (4,390,367)
                                    28,188
        634,100       63           995,962
      1,265,000      126         7,175,375
                                                                     (4,369,653)
      ---------    -----      ------------       ----------        ------------
      2,884,535      288         9,642,434                           (8,760,020)
        236,721       24           458,697
        537,623       54         2,636,195
         50,000        5           324,995
                                                                     (2,836,609)
      ---------    -----      ------------       ----------        ------------
      3,708,879    $ 371      $ 13,062,321       $        -        $(11,596,629)
      =========    =====      ============       ==========        ============


                                      F-5
<PAGE>

SUNPHARM CORPORATION
(A Development Stage Company)

STATEMENTS OF STOCKHOLDERS' EQUITY (Continued)
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------
                                                                                REDEEMABLE CONVERTIBLE
                                                                                    PREFERRED STOCK
                                                                   -----------------------------------------------------
                                                                          SERIES A                        SERIES B
                                                                   -----------------------         ---------------------
                                                                     SHARES         AMOUNT         SHARES       AMOUNT

<S>                                                                  <C>           <C>             <C>          <C>     

BALANCE, DECEMBER 31, 1996                                                              
  Exercise of stock options                                                             
  Issuance of common stock                                                              
  Issuance of warrants for service                                                      
  Net loss                                                                              
                                                                     --------      --------        -------      -------
BALANCE, DECEMBER 31, 1997                                                         $                            $   
                                                                     ========      ========        =======      =======
</TABLE>

The accompanying notes are an integral part of these financial statements.


                                      F-6

<PAGE>

- --------------------------------------------------------------------------------
                                                                     DEFICIT
                                                                   ACCUMULATED
          COMMON STOCK          ADDITIONAL        DEFERRED            DURING
      ---------------------      PAID-IN          DEFERRED         DEVELOPMENT
        SHARES     AMOUNT        CAPITAL        COMPENSATION          STAGE
        ------     ------        -------        ------------          -----

      3,708,879    $ 371      $ 13,062,321                       $ (11,596,629)
         75,663        8            15,802                 
      1,953,286      195         6,519,055                 
                                    90,020                 
                                                                    (3,906,425)
      ---------    -----      ------------     -------           -------------
                         
      5,737,828    $ 574      $ 19,687,198     $     -           $ (15,503,054)
      =========    =====      ============     =======           =============



                                      F-7
<PAGE>


SUNPHARM CORPORATION
(A Development Stage Company)

STATEMENTS OF CASH FLOWS
<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------------
                                                                                                          PERIOD FROM
                                                                                                          MAY 3, 1990
                                                                                                           (DATE OF
                                                                                                         INCORPORATION)
                                                                              YEARS ENDED                      TO
                                                                              DECEMBER 31,                DECEMBER 31,
                                                                    -----------------------------        --------------
                                                                         1997             1996                 1997

<S>                                                                 <C>              <C>                 <C>           
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net loss                                                          $ (3,906,425)    $ (2,836,609)       $ (15,503,054)
  Adjustments to reconcile net loss to net cash
    used in operating activities:
      Depreciation and amortization                                        5,692            1,800               77,398
      Issuance of warrants for services                                   90,020                               133,770
      Compensation expense related to options, warrants
        and stock appreciation rights                                                                          865,246
      Amortization of deferred offering costs incurred in
        connection with issuance of Bridge Notes                                                               775,000
      Write-off of patents                                                                                      70,120
      (Increase) decrease in receivable from stockholder                 (96,611)           3,114             (106,611)
      (Decrease) increase in prepaid expenses
       and other assets                                                  406,042         (452,209)            (207,665)
      Increase (decrease) in accounts payable                             76,545          (37,271)             399,996
      (Decrease) increase in accrued liabilities                        (637,491)         716,762              238,004
      Increase in accrued legal fees                                                                           300,000
                                                                    ------------     ------------        -------------
          Total adjustments                                             (155,803)         232,196            2,545,258
                                                                    ------------     ------------        -------------

          Net cash used in operating activities                       (4,062,228)      (2,604,413)         (12,957,796)
                                                                    ------------     ------------        -------------

CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchases of short-term investments                                (12,815,678)      (1,795,312)         (17,935,052)
  Sales and maturities of short-term investments                      10,342,424        1,290,464           13,666,486
  Purchases of property and equipment                                    (26,824)                              (44,022)
  Payment of patent costs                                                                                      (67,424)
                                                                    ------------     ------------        -------------

          Net cash used in investing activities                       (2,500,078)        (504,848)          (4,380,012)
                                                                    ------------     ------------        -------------

                                                                                                          (Continued)
</TABLE>


                                      F-8
<PAGE>


SUNPHARM CORPORATION
(A Development Stage Company)

STATEMENTS OF CASH FLOWS (Continued)
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------
                                                                                    PERIOD FROM
                                                                                    MAY 3, 1990
                                                                                     (DATE OF
                                                                                   INCORPORATION)
                                                              YEARS ENDED               TO
                                                              DECEMBER 31,         DECEMBER 31,
                                                      --------------------------   --------------
                                                          1997           1996           1997

<S>                                                   <C>            <C>           <C>        
CASH FLOWS FROM FINANCING ACTIVITIES:
  Proceeds (repayments) of notes payable              $    43,070    $    24,367   $    55,271
  Increase in deferred offering costs                                                  597,348
  Issuance of Series A redeemable convertible
    preferred stock                                                                    513,525 
  Issuance of Series B redeemable convertible
    preferred stock                                                                    450,000
  Issuance of common stock                              6,535,060      3,094,970    17,273,329
  Proceeds from payable to stockholders                                                542,500
  Repayment of payable to stockholders                                                (542,500)
                                                      -----------    -----------   -----------

          Net cash provided by financing activities     6,578,130      3,119,337    17,694,777
                                                      -----------    -----------   -----------

NET CHANGE IN CASH                                         15,824         10,076       356,969

CASH AT BEGINNING OF PERIOD                               341,145        331,069            --
                                                      -----------    -----------   -----------

CASH AT END OF PERIOD                                 $   356,969    $   341,145   $   356,969
                                                      ===========    ===========   ===========

SUPPLEMENTAL INFORMATION:
  Cash paid for interest                              $     2,512    $     3,030   $   167,452
                                                      ===========    ===========   ===========

The accompanying notes are an integral part of these financial statements.       (Concluded)
</TABLE>


                                      F-9


<PAGE>


SUNPHARM CORPORATION
(A DEVELOPMENT STAGE COMPANY)

NOTES TO FINANCIAL STATEMENTS
YEARS ENDED DECEMBER 31, 1997 AND 1996 AND THE PERIOD FROM
MAY 3, 1990 (DATE OF INCORPORATION) TO DECEMBER 31, 1997
- --------------------------------------------------------------------------------


1.    ORGANIZATION

      SunPharm Corporation ("SunPharm" or the "Company"), formerly LexiGen,
      Incorporated, was incorporated in the State of Delaware on May 3, 1990,
      issued shares of its common stock in 1991, and commenced operations in
      February 1992. The Company was formed to develop and commercialize unique
      and proprietary polyamine analogs with antiproliferative and other
      therapeutic uses.

      The Company is a development stage company which has devoted substantially
      all of its efforts to research and product development and has not yet
      generated any revenues from the sale of products. At this time, there can
      be no assurance of future revenues. In addition, the Company expects to
      continue to incur losses for the foreseeable future, and there can be no
      assurance that the Company will successfully complete the transition from
      a development stage company to successful operations. The research and
      development activities in which the Company is engaged involve a high
      degree of risk and uncertainty. The ability of the Company to successfully
      develop, manufacture and market its proprietary products is dependent upon
      many factors. These factors include, but are not limited to, the need for
      additional financing, the reliance on collaborative arrangements for
      research and contractual agreements with corporate partners, the Company's
      dependence on its exclusive license agreement with the University of
      Florida, the ability to attract and retain key personnel and consultants,
      including its founder, and the ability to develop manufacturing, sales and
      marketing expertise. Additional factors include uncertainties as to
      patents and proprietary technologies, technological change and risk of
      obsolescence, development of the product, competition, government
      regulations and regulatory approval, the uncertainty of health care reform
      and product liability exposure.

      In order to continue its research and product development activities as
      planned, the Company has raised equity through an initial public offering
      ("IPO") and various private placements of the Company's common stock and
      Series A and Series B redeemable convertible preferred stocks. Such
      offerings through December 31, 1997 have resulted in net proceeds of
      approximately $18,237,000. The Company intends to obtain additional funds
      for research and development through collaborative arrangements with
      corporate partners, additional financings, and from other sources;
      however, there can be no assurance that the Company will be able to obtain
      necessary financing when required or what the terms of any financing, if
      obtained, might be. Accordingly, there can be no assurance of the
      Company's future success.

      Presently, the Company is exploring a number of financing alternatives
      which would generate cash resources through a private sale of equity in
      the Company. There can be no assurance that a transaction will be
      completed or, if completed, there can be no assurance as to the terms or
      amount of such transaction.


                                      F-10

<PAGE>

SUNPHARM CORPORATION
(A DEVELOPMENT STAGE COMPANY)

NOTES TO FINANCIAL STATEMENTS
YEARS ENDED  DECEMBER 31, 1997 AND 1996 AND THE PERIOD FROM MAY 3, 1990 (DATE OF
INCORPORATION) TO DECEMBER 31, 1997 (CONTINUED)
- --------------------------------------------------------------------------------


      In August 1994, the board of directors authorized a 1.558-for-1 stock
      split of all outstanding stock, increased the number of shares of
      authorized common stock to 25,000,000 and changed the par value of the
      common stock to $.0001 per share, all of which was approved by the
      stockholders in October 1994. All share and per share amounts have been
      retroactively restated to reflect the stock split for all years presented.

2.    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

      BASIS OF PRESENTATION - The financial statements are presented in
      accordance with generally accepted accounting principles, which require
      management to make estimates that affect the reported amounts and
      contingency disclosures in the financial statements. Actual results could
      differ from these estimates.

      PATENT COSTS - The Company reimburses the University of Florida Research
      Foundation, Inc. ("UFRFI"), for direct expenses related to the Company's
      licensed patents. Patent costs consist of legal fees and other direct
      costs incurred in filing, prosecuting and maintaining the licensed
      patents. These costs are charged directly to research and development
      expense.

      RESEARCH AND DEVELOPMENT - Sponsored research payments are recognized as
      revenue when the research underlying such payments has been performed.
      Research and development expenses are charged to operations as incurred.
      Research and development expenses principally include, among other things,
      consulting fees and cost reimbursements to UFRFI, preclinical and clinical
      testing of compounds under investigation and salaries and benefits of
      employees engaged in research and development activities.

      EQUIPMENT - Office and laboratory equipment is carried at cost less
      accumulated depreciation, which is computed on a straight-line basis over
      the estimated useful lives of the related assets. The useful lives
      generally fall between 5 and 10 years.

      EARNINGS PER SHARE - During the year ended December 31, 1997, the Company
      adopted SFAS No. 128, "Earnings per Share" (SFAS 128). This Statement
      establishes standards for computing and presenting earnings per share
      ("EPS") and applies to all entities with publicly held common stock or
      potential common stock. This Statement replaces the presentation of
      primary EPS and fully diluted EPS with a presentation of basic EPS and
      diluted EPS, respectively. Basic EPS excludes dilution and is computed by
      dividing earnings available to common stockholders by the weighted-average
      number of common shares outstanding for the period. Similar to fully
      diluted EPS, diluted EPS reflects the potential dilution of securities
      that could share in the earnings. Since the Company has experienced losses
      since inception, there is no dilutive effect of any of its common stock
      equivalents. Accordingly, only basic EPS is shown.


                                      F-11
<PAGE>
SUNPHARM CORPORATION
(A DEVELOPMENT STAGE COMPANY)

NOTES TO FINANCIAL STATEMENTS
YEARS ENDED  DECEMBER 31, 1997 AND 1996 AND THE PERIOD FROM MAY 3, 1990 (DATE OF
INCORPORATION) TO DECEMBER 31, 1997 (CONTINUED)
- --------------------------------------------------------------------------------

      STOCK OPTIONS, WARRANTS AND SARS - Effective January 1, 1996, the Company
      adopted SFAS No. 123, "Accounting for Stock-Based Compensation" (SFAS
      123). SFAS 123 establishes a fair value based method of accounting for
      stock-based employee compensation plans; however, it also allows an entity
      to continue to measure compensation cost for those plans using the
      intrinsic value based method of accounting prescribed by Accounting
      Principles Board ("APB") Opinion No. 25, "Accounting for Stock Issued to
      Employees." Under the fair value based method, compensation cost is
      measured at the grant date based on the value of the award and is
      recognized over the service period, which is usually the vesting period.
      The Company has elected to continue to account for its employee stock
      compensation plans under APB Opinion No. 25 with pro forma disclosures of
      net earnings and earnings per share, as if the fair value based method of
      accounting defined in SFAS 123 has been applied.

      NEW ACCOUNTING STANDARDS - In June, 1997 the Financial Accounting
      Standards Board issued Statement of Financial Accounting Standards No.
      130, "Reporting Comprehensive Income" (SFAS 130). This statement
      establishes standards for reporting and display of comprehensive income
      and its components (revenues, expenses, gains, and losses) in a full set
      of general-purpose financial statements. SFAS 130 requires that all items
      that are required to be recognized under accounting standards as
      components of comprehensive income be reported in a financial statement
      that is displayed with the same prominence as other financial statements.
      SFAS 130 does not require a specific format for that financial statement
      but requires that an enterprise display an amount representing total
      comprehensive income for the period in that financial statement.
      Additionally, SFAS 130 requires that an enterprise (a) classify items of
      other comprehensive income by their nature in a financial statement and
      (b) display the accumulated balance of other comprehensive income
      separately from retained earnings and additional paid-in capital in the
      equity section of a statement of financial position. This Statement is
      effective for fiscal years beginning after December 15, 1997.
      Reclassification of financial statements for earlier periods provided for
      comparative purposes is required. Management has not determined the effect
      of this statement on its financial statement disclosure.

      RECLASSIFICATIONS - Certain reclassifications have been made in the 1996
      and period from May 3, 1990 (Date of Incorporation) to December 31, 1996
      financial statements to conform to the classifications used in the 1997
      financial statements.

3.    INITIAL PUBLIC OFFERING AND SUBSEQUENT SECURITIES OFFERING

      On January 12, 1995, the Company completed an IPO of 1,100,000 units
      ("Unit") at $7.00 per Unit. Each Unit consisted of one share of the
      Company's common stock and one Redeemable Common Stock Purchase Warrant
      ("IPO Warrant"), which entitled the holder to purchase one share of common
      stock at $8.75 per share until expiration on April 13, 1998, as extended
      from the original expiration of January 12, 1998. The IPO Warrants have
      been subject to redemption by the Company commencing January 1996 at $.05
      per Warrant, providing the closing bid price of the Company's common stock
      exceeds $12.25 per share for 20 consecutive trading days ending within
      five days of the notice of redemption. Additionally, on February 16, 1995,
      the underwriter of the offering (the "Representative") exercised an option
      to purchase an additional 165,000 Units at $7.00 per Unit
      (Representative's over-allotment option).


                                      F-12
<PAGE>

SUNPHARM CORPORATION
(A DEVELOPMENT STAGE COMPANY)

NOTES TO FINANCIAL STATEMENTS
YEARS ENDED  DECEMBER 31, 1997 AND 1996 AND THE PERIOD FROM MAY 3, 1990 (DATE OF
INCORPORATION) TO DECEMBER 31, 1997 (CONTINUED)
- --------------------------------------------------------------------------------


      Proceeds from the Company's IPO were approximately $7,200,000 of cash, net
      of underwriting costs and other offering costs of $1,655,000. Of such net
      proceeds, approximately $1,793,000 were used to repay the outstanding
      indebtedness (including accrued interest and certain fees) of the Company.
      In addition, other expenses which were paid included approximately
      $310,000 for human clinical trials of DEHOP and DENSPM, $150,000 for
      research and development of other potential products, $240,000 for general
      corporate expenses, and approximately $210,000 to pay royalties to UFRFI.

      In connection with the IPO, the Company sold to the Representative, for
      nominal consideration, a unit purchase option to purchase up to 110,000
      Units substantially identical to the Units sold in the offering in all
      respects, except that each warrant included in the unit purchase option
      entitled the holder to purchase one share of common stock at $11.375 per
      share. The unit purchase option will be exercisable during the four-year
      period commencing January 12, 1996, at an exercise price of $11.20 per
      Unit.

      Also, during the five-year period from the date of the offering, in the
      event the Representative originates a financing or a merger, acquisition,
      joint venture, strategic alliance introduction or other similar
      transaction to which the Company is a party, the Representative would be
      entitled to a finder's fee in consideration of the origination of the
      transaction. The fee is based upon a percentage of the consideration paid
      in the transaction or, in the case of an introduction to a customer, a
      five-year royalty on sales. In both instances, the consideration would
      consist of 5% of the first $1,000,000, 4% of the next $1,000,000, and 3%
      of any amount in excess of $2,000,000.

      During the year ended December 31, 1996, the Company completed a private
      placement of 537,623 units pursuant to Regulation D of the Securities Act
      of 1933 for $5.50 per Unit. Each unit consists of one share of the
      Company's common stock and one redeemable Common Stock Purchase Warrant
      ("1996 Warrant"). The 1996 Warrants included in these units expire four
      years from the date of issuance and have exercise prices of $5.50 per
      share until the anniversary date, $6.50 per share until the second
      anniversary date, and $7.50 per share thereafter. The 1996 Warrants are
      subject to redemption by the Company at $.01` per 1996 Warrant, provided
      the Company's common stock closes at a price of $8.50, $9.50 or $10.50 per
      share for twenty consecutive days during the second, third or fourth
      years, respectively, of the term of the 1996 Warrant.

      Proceeds from the private placement as well as proceeds from the warrant
      exchange discussed in Note 8 were approximately $3,095,000 in cash, net of
      placement agent and other offering costs of approximately $355,000.

      During the year ended December 31, 1997, the Company sold 1,948,286 units,
      each consisting of one share of the Company's common stock and one
      redeemable Common Stock Purchase Warrant ("1997 Warrant") for $3.50 per
      unit. The 1997 Warrants included in the units expire five years from the
      date of issuance. In case of a "cashless exercise," the 1997 Warrant
      exercise price is $4.00 per share plus forty percent of the difference
      between the current trading price of the Company's common stock and 


                                      F-13
<PAGE>


SUNPHARM CORPORATION
(A DEVELOPMENT STAGE COMPANY)

NOTES TO FINANCIAL STATEMENTS
YEARS ENDED  DECEMBER 31, 1997 AND 1996 AND THE PERIOD FROM MAY 3, 1990 (DATE OF
INCORPORATION) TO DECEMBER 31, 1997 (CONTINUED)
- --------------------------------------------------------------------------------

      $4.00, in all other cases, the 1997 Warrant exercise price is $4.00 per
      share plus thirty percent of the difference between the current trading
      price of the Company's common stock and $4.00. The 1997 Warrants are
      subject to redemption by the Company at the exercise price, provided the
      Company's common stock closes at a price of $16.00, $20.00, or $28.00 per
      share for twenty consecutive days during the second, third, fourth or
      fifth years, respectively, of the term of the 1997 Warrant. Proceeds from
      the private placement were $6,519,250, net of placement agent and other
      offering costs of $324,500.

4.    INVESTMENTS

      At December 31, 1997 and 1996, the Company's investments consisted
      primarily of United States treasury bills and agency obligations, as well
      as certificates of deposit. These investments are available for sale, and
      cost plus accrued interest approximates fair market value. At December 31,
      1997 and 1996, these securities had maturities of less than one year.

5.    NOTES PAYABLE

      In January and March 1993, the Company issued notes payable in the
      aggregate principal amount of $522,500 primarily to SunPharm Investors
      L.P., a limited partnership in which 7 percent of the funds loaned to the
      Company were contributed by existing stockholders of the Company. Costs
      associated with this issuance totaled $57,500. There were also stock
      purchase warrants issued as discussed in Note 8. The notes bore interest
      at 9.5 percent through January 1995, when they were repaid.

      In August and September 1994, two directors of the Company loaned $5,000
      and $50,000, respectively, to the Company. The loans were repaid from the
      proceeds of the Bridge Financing discussed below. In addition, the
      directors were granted warrants to acquire 500 and 5,000 shares,
      respectively, of common stock at an exercise price of $5.50.

      On September 27, 1994, the Company issued notes totaling $1,000,000 as a
      bridge financing for the IPO (the "Bridge Notes"). The holders of the
      Bridge Notes also received warrants to purchase 228,573 shares of common
      stock at an exercise price of $4.375 per share. The estimated value of
      $600,000 for the warrants was recorded as additional paid-in capital and
      deferred offering costs during 1994. Proceeds of the Bridge Notes were
      $825,000, net of a $100,000 placement fee paid to the placement agent and
      $75,000 of offering costs. The total deferred offering costs of $775,000
      were charged to expense upon repayment of the Bridge Notes in 1995. The
      Bridge Notes bore interest at an annual rate of 10% and were repaid in
      January and February 1995 from the proceeds of the IPO.

      In November and December 1994, two directors of the Company loaned
      $100,000 and $75,000, respectively, to the Company. The notes bore
      interest at 12% per annum and were repaid from the proceeds of the
      Offering in January 1995. In addition, the directors were granted 10,000
      and 7,500 warrants, respectively, to acquire shares of common stock at an
      exercise price of $7.00. The warrants were not exercisable until the
      second anniversary of the completion of the IPO.


                                      F-14
<PAGE>

SUNPHARM CORPORATION
(A DEVELOPMENT STAGE COMPANY)

NOTES TO FINANCIAL STATEMENTS
YEARS ENDED  DECEMBER 31, 1997 AND 1996 AND THE PERIOD FROM MAY 3, 1990 (DATE OF
INCORPORATION) TO DECEMBER 31, 1997 (CONTINUED)
- --------------------------------------------------------------------------------


      In January 1995, two directors of the Company loaned a total of $25,000 to
      the Company. The notes bore interest at 12% per annum and were repaid from
      the proceeds of the IPO. In addition, the directors were granted warrants
      to acquire 2,500 shares of common stock at an exercise price of $7.00. The
      warrants were not exercisable until the second anniversary of the
      completion of the IPO.

      At December 31, 1997 and 1996, Note Payable as shown on the Company's
      balance sheets represents obligations for insurance premiums.

6.    COMMITMENTS AND CONTINGENCIES

      The Company has entered into an agreement with Dr. Raymond Bergeron,
      inventor of the technology which the Company has licensed, under which the
      Company is obligated to pay $8,000 per month for consulting services
      through December 1998.

      In March 1993, the Company entered into an employment agreement with the
      founder. The agreement provides for an annual base salary of $120,000 for
      a three-year period beginning April 1, 1993. The board of directors
      approved a $30,000 bonus upon the closing of the bridge financing
      discussed in Note 5 and, effective June 1, 1994, the annual base salary
      was increased to $132,000. In March 1995, the board of directors approved
      a $35,000 bonus for services performed during the preceding twelve months,
      extended the agreement to March 31, 1997 and agreed to increase the annual
      base salary to $150,000, effective April 1, 1995. In August 1997, the
      board of directors approved a bonus of $15,000, the grant of 25,000
      incentive stock options (see "1994 Plan" in Note 8) and an increase in
      annual base salary to $200,000 effective April 1, 1997.

      On December 20, 1995, Dean L. Rider, M.D. ("Rider"), a stockholder of the
      Company, filed suit against the Company and Stefan Borg in Superior Court
      for the City and County of San Francisco, California, seeking compensatory
      damages of over $41 million and punitive damages based upon an alleged
      agreement between SunPharm and Rider. In June 1996, the Company settled
      this litigation with Rider by issuing Rider 50,000 shares of SunPharm
      common stock. Such shares have subsequently been registered for resale.
      The issuance of the shares was recorded by a reduction in legal fees
      accrued at December 31, 1995, which approximated the fair value of the
      shares issued. The Company believes that the claims made by Rider were
      without merit, and did not admit to any wrongdoing in connection with the
      settlement. The Company agreed to the settlement because it believed the
      cost of the settlement to be more economical than the cost of continuing
      to incur significant legal expenses to defend this matter.

      The Company leases office space and office equipment under operating
      leases. Lease expense for the years ended December 31, 1997 and 1996 was
      approximately $75,500 and $62,700, respectively.

      During January 1998, the Company entered into a commitment to lease
      certain office space, anticipated to be occupied in September 1998. This
      operating lease has a term of 5 years, with total minimum rents of
      $556,500.


                                      F-15
<PAGE>

SUNPHARM CORPORATION
(A DEVELOPMENT STAGE COMPANY)

NOTES TO FINANCIAL STATEMENTS
YEARS ENDED  DECEMBER 31, 1997 AND 1996 AND THE PERIOD FROM MAY 3, 1990 (DATE OF
INCORPORATION) TO DECEMBER 31, 1997 (CONTINUED)
- --------------------------------------------------------------------------------


7.    PREFERRED STOCK

      Upon the closing of the IPO in January 1995, the Series A and Series B
      Redeemable Convertible Preferred Stock outstanding automatically converted
      into 479,700 and 154,400 shares of common stock, respectively. The Company
      presently has 2,500,000 shares of undesignated serial preferred stock
      authorized, with none issued and outstanding.

8.    STOCK OPTIONS, WARRANTS AND OTHER INCENTIVE COMPENSATION

      In 1992, the Company issued warrants to a director to purchase 77,900
      shares of the Company's common stock. The warrants are exercisable at
      $1.93 per share. In connection with certain notes payable issued in 1993,
      the Company issued warrants to purchase 155,021 shares and 133,234 shares
      of the Company's common stock at exercise prices of $1.93 per share and
      $3.21 per share, respectively. These warrants have been recorded at zero
      in the accompanying financial statements as the value at the time of
      issuance was de minimus.

      During 1996, the Company offered the Bridge Note warrant holders discussed
      in Note 5 and SunPharm Investors L.P. discussed above a thirty percent
      reduction in their applicable exercise price if they exercised their
      warrants prior to December 31, 1996. Additionally, for each four warrants
      exercised, a warrant identical to those included in the units described in
      Note 2 would be issued. As a result of this warrant exchange offer, 62,858
      of the Bridge Note warrants and 173,863 of SunPharm L.P. warrants were
      exercised in exchange for 236,721 shares of stock and 59,178 new warrants.
      Proceeds from this transaction were approximately $459,000 of cash, net of
      offering costs of approximately $34,000.

      The Company's board of directors granted stock options to employees and
      other parties to purchase common stock. Employee options generally vest
      over a sixty month period or over the term of an employment agreement.
      Options granted to consultants generally vest over a particular service
      period or in connection with certain milestones. Also, certain options
      previously granted had immediate vesting provisions. Most options expire
      seven years from the date of grant if not exercised.

      In April 1994, the board of directors of the Company approved the 1994
      Stock Option Plan (1994 Plan) and reserved 350,550 shares of common stock
      for issuance of stock options to employees and consultants. In 1997, the
      board of directors increased the number of shares reserved by the Plan to
      750,000 shares. The 1994 plan is composed of incentive stock options and
      nonqualified stock options. The options generally vest over a two- to
      five-year period, and the incentive stock options expire 10 years from the
      date of grant. For the years ended December 31, 1997 and 1996, there were
      200,865 shares and 80,000 shares granted from this plan, respectively.


                                      F-16
<PAGE>


SUNPHARM CORPORATION
(A DEVELOPMENT STAGE COMPANY)

NOTES TO FINANCIAL STATEMENTS
YEARS ENDED  DECEMBER 31, 1997 AND 1996 AND THE PERIOD FROM MAY 3, 1990 (DATE OF
INCORPORATION) TO DECEMBER 31, 1997 (CONTINUED)
- --------------------------------------------------------------------------------


      On July 10, 1995, the stockholders of the Company approved the SunPharm
      Corporation 1995 Nonemployee Directors' Stock Option Plan (the "1995
      Directors' Plan"). The maximum number of shares of common stock with
      respect to which options may be granted under this plan is 300,000 as
      amended in 1997, subject to appropriate adjustment upon a reorganization,
      stock split, recapitalization or other change in the Company's capital
      structure. Directors who are not employees or consultants to the Company
      are eligible to receive nonqualified stock options which, in accordance
      with the plan, must be issued at one hundred percent (100%) of the fair
      market value of the common stock of the Company on the date of grant.
      Directors who are eligible to receive options under the 1995 Directors'
      Plan, will be entitled to receive an option to purchase 25,000 shares of
      common stock on the date on which they become a director. Additionally,
      eligible directors will be entitled to receive options annually on the
      date of their reelection to the Board of Directors to purchase 5,000
      shares (with an additional 10,000 shares for the Chairman of the Board of
      Directors, if he is eligible) of common stock. For the years ended
      December 31, 1997 and 1996, options to purchase 240,000 and 60,000 shares
      of common stock were granted under the 1995 Directors' Plan.

      In August 1994, the Company elected a director of the Company, and engaged
      him as a consultant to provide management, marketing, economic and
      strategic planning services during a two-year period. The director was
      compensated under such consulting agreement at a rate of $7,500 per month,
      and by the issuance of a stock appreciation right ("SAR") for 150,000
      common stock equivalents, exercisable (commencing in 1996 with respect to
      50% and in 1997 with respect to the remainder) in an amount equal to the
      excess of the fair market value of the Company's common stock on the date
      of exercise over the initial public offering price of the Units. Such
      stock appreciation right terminates on January 1, 2000. As consideration
      for his serving on the Board of Directors, the director was granted a
      five-year stock purchase warrant ("Warrant") for 225,000 shares of common
      stock of the Company, such warrant being exercisable at a price of $5.50
      per share. In 1995, the Company recorded compensation expense of $18,750
      and $28,188 in connection with the SAR and the warrant, respectively, and
      due to the terms, may incur additional non-cash charges in the future. No
      compensation expense was recorded in 1997 or 1996 related to any options,
      warrants or SARs based on the quoted market value of the Company's common
      stock.

      During the year ended December 31, 1997, the Company issued warrants to
      two investment companies to purchase 150,000 shares of the Company's
      common stock. The warrants were valued at approximately $90,000 which
      represents the fair value of the services provided. Such amount has been
      charged to current period operations with an increase to additional
      paid-in-capital.


                                      F-17
<PAGE>


SUNPHARM CORPORATION
(A DEVELOPMENT STAGE COMPANY)

NOTES TO FINANCIAL STATEMENTS
YEARS ENDED  DECEMBER 31, 1997 AND 1996 AND THE PERIOD FROM MAY 3, 1990 (DATE OF
INCORPORATION) TO DECEMBER 31, 1997 (CONTINUED)
- --------------------------------------------------------------------------------


      SFAS NO. 123 REQUIRED DISCLOSURE

      If compensation cost for stock option, SARs and warrant grants ("Grants")
      had been determined based on the fair value at the grant dates for 1997
      and 1996 consistent with the method prescribed by SFAS No. 123, the
      Company's net loss and loss per share would have been adjusted to the pro
      forma amounts indicated below:

<TABLE>
<CAPTION>
                                                            1997               1996
                                                       ------------       -------------
<S>                             <C>                    <C>                <C>          
Net loss                        As reported            $ (3,906,425)      $ (2,836,609)
                                Pro forma                (4,464,082)        (3,242,139)

Loss per share                  As reported                   (0.75)             (0.92)
                                Pro forma                     (0.86)             (1.05)
</TABLE>

      Under SFAS No. 123, the fair value of each Grant is estimated on the date
      of grant using the Black-Scholes option-pricing model with the following
      weighted-average assumptions used for grants in 1997 and 1996,
      respectively: dividend yield of 0 and 0 percent, expected volatility of
      77.8% and 52.6% percent, risk-free interest rates of 6.33% and 6.54%
      percent, and expected lives of 7 and 10 years.

      A summary of the status of Grants under the Company's stock-based
      compensation plans as of December 31, 1997 and 1996, and changes during
      the years ending on those dates is presented below:

<TABLE>
<CAPTION>
                                                             1997                       1996
                                                  -------------------------  ---------------------------
                                                                  WEIGHTED-                    WEIGHTED-
                                                                   AVERAGE                      AVERAGE
                                                                  EXERCISED                    EXERCISED
                                                    GRANTS          PRICE       GRANTS           PRICE
                                                    ------          -----       ------           -----

<S>                                                <C>             <C>         <C>              <C>   
Outstanding at beginning of year                  1,384,696        $ 3.25      1,244,696        $ 2.97

  Granted                                           249,500          3.79        140,000          5.75
  Exercised                                         (72,806)         0.10
                                                  ---------

Outstanding at end of year                        1,561,390        $ 3.48      1,384,696        $ 3.25
                                                  =========                  ===========

Grants exercisable at year-end                    1,205,703                    1,003,926
                                                  =========                  ===========

Weighted-average fair value of
  Grants granted during the year                  $ 717,531                  $   610,530
                                                  =========                  ===========
</TABLE>

                                      F-18
<PAGE>

SUNPHARM CORPORATION
(A DEVELOPMENT STAGE COMPANY)

NOTES TO FINANCIAL STATEMENTS
YEARS ENDED  DECEMBER 31, 1997 AND 1996 AND THE PERIOD FROM MAY 3, 1990 (DATE OF
INCORPORATION) TO DECEMBER 31, 1997 (CONTINUED)
- --------------------------------------------------------------------------------


      The following table summarizes information about the outstanding Grants at
December 31, 1997:

<TABLE>
<CAPTION>
                                                   GRANTS OUTSTANDING                        GRANTS EXERCISABLE
                                       --------------------------------------------     ------------------------------
                                         NUMBER            WEIGHTED-                      NUMBER
                                       OUTSTANDING          AVERAGE       WEIGHTED-     EXERCISABLE          WEIGHTED-
                                            AT             REMAINING       AVERAGE          AT                AVERAGE
   RANGE OF                            DECEMBER 31,       CONTRACTUAL     EXERCISE      DECEMBER 31,          EXERCISE
EXERCISE PRICES                            1997               LIFE          PRICE          1997                PRICE
- ---------------                            ----               ----          -----          ----                -----

<S>                                      <C>                  <C>          <C>           <C>                  <C>   
$.0064 to $.32                           390,446              2.90         $ 0.31        1316,441             $ 0.30
$1.60 to $2.80                           312,070              5.78           1.91         215,900               1.75
$3.00 to $4.50                           148,374              9.33           3.56          54,669               3.48
$5.00 to $5.50                           545,500              4.11           5.52         462,583               5.53
$6.54 to $8.75                           165,000              6.86           4.38         156,110               7.19
                                       ---------                                        ---------

                                       1,561,390                                        1,205,703
                                       =========                                        =========
</TABLE>


      Remaining  non-exercisable Grants as of December 31, 1997 become available
as follows:

                                1998                                135,117
                                1999                                125,292
                                2000                                 40,900
                                2001                                 36,900
                                2002                                 17,478
                                                                    -------

                                                                    355,687

9.    FEDERAL INCOME TAXES

      The Company has incurred losses since inception and, therefore, has not
      been subject to federal income taxes. As of December 31, 1997, the Company
      has net operating loss (NOL) and tax credit carryforwards for income tax
      purposes of approximately $13,327,000 and $464,000, respectively, which
      may be available to reduce future taxable income and future tax
      liabilities. These carryforwards begin to expire in 2008.

      The Tax Reform Act of 1986 provides for an annual limitation on the use of
      NOL and credit carryforwards (following certain ownership changes) that
      could significantly limit the Company's ability to utilize these
      carryforwards. The Company has made no determination concerning whether
      there has been such a cumulative change in ownership, and it is possible
      that such a change in ownership occurred following the completion of the
      Company's IPO, subsequent private placements, and subsequent exercise of
      the Warrants. Accordingly, the Company's ability to utilize the
      aforementioned carryforwards to reduce future taxable income and tax
      liabilities may be limited. Additionally, because United States tax laws
      limit the time during which these carryforwards may be 


                                      F-19
<PAGE>
SUNPHARM CORPORATION
(A DEVELOPMENT STAGE COMPANY)

NOTES TO FINANCIAL STATEMENTS
YEARS ENDED  DECEMBER 31, 1997 AND 1996 AND THE PERIOD FROM MAY 3, 1990 (DATE OF
INCORPORATION) TO DECEMBER 31, 1997 (CONTINUED)
- --------------------------------------------------------------------------------

      applied against future taxes, the Company may not be able to take full
      advantage of these attributes for federal income tax purposes.

      As the Company has had cumulative losses and there is no assurance of
      future taxable income, a valuation allowance has been established to fully
      offset the deferred tax asset related to the net operating losses and
      other items. The components of the Company's deferred tax assets at
      December 31, 1997 and 1996 are as follows:

                                                  1997         1996
                                               ----------   ----------

        Net operating loss carryforwards       $4,997,000   $3,582,000
        Research and development tax credits      464,000      338,000
        Deferred compensation                     326,000      326,000
                                               ----------   ----------
             Total deferred tax assets          5,787,000    4,246,000

        Less valuation allowance                5,787,000    4,246,000
                                               ----------   ----------

        Net deferred tax assets                $       --   $       --
                                               ==========   ==========


10.   RESEARCH AND DEVELOPMENT

      In 1991, the Company issued 311,600 shares of common stock to UFRFI,
      recorded at $2,000, for exclusive, worldwide license agreement rights. The
      Company also paid a maintenance fee to UFRFI in the amount of $50,000
      which was charged to research and development expense. This fee is
      credited toward sponsored research payments and/or royalties. In March
      1993, the license agreement was amended to provide for additional patent
      rights for the Company in exchange for the Company's payment of patent
      costs incurred by UFRFI prior to the amendment, a license fee of $40,000
      payable to UFRFI upon execution of the amendment, the issuance of 31,160
      shares of common stock valued at $10,000 and an increase in annual
      maintenance fee payable to UFRFI from $50,000 to $100,000. In September
      1996, this agreement was further amended providing for more patent rights
      for the Company in exchange for the Company's payment of a one-time
      license fee of $50,000 and an increase in the annual maintenance to
      $200,000 beginning in 1997.

      The Company has also entered into a research agreement with UFRFI. For the
      years ended December 31, 1996 and 1995, the Company paid $535,000 and
      $869,000, respectively, to UFRFI under the terms of the research
      agreement. The amount paid in 1995 includes the maintenance fee of
      $100,000 for 1996. In September 1996, this agreement was amended
      concurrently with the license agreement described above for increased
      sponsored research payments related to the Company's products from
      $625,000 in 1995 to $641,000 in 1996, $854,250 in 1997 and $875,000 in
      1998. These expenses are charged to operations as incurred. Failure to pay
      such costs could result in termination of the license agreement rights. If
      UFRFI were to terminate the license, the Company's rights to manufacture
      and market the technology and related products would terminate and such an
      event would have a material adverse effect on the Company. In 1995, the
      Company paid $50,000 to UFRFI for an additional license, described below.
      The Company also paid UFRFI $210,00 and $151,000 in 1997 and 1996,
      respectively, for reimbursement of patent costs.


                                      F-20
<PAGE>


SUNPHARM CORPORATION
(A DEVELOPMENT STAGE COMPANY)

NOTES TO FINANCIAL STATEMENTS
YEARS ENDED  DECEMBER 31, 1997 AND 1996 AND THE PERIOD FROM MAY 3, 1990 (DATE OF
INCORPORATION) TO DECEMBER 31, 1997 (CONTINUED)
- --------------------------------------------------------------------------------


      The Company agreed to pay a royalty on net sales of licensed products up
      to 6 percent of net sales for each product. A royalty of 28 percent of
      sublicensee payments, but no less than 2 percent of net sales by such
      sublicensee, will also be payable to UFRFI. The Company paid UFRFI
      $210,000 in royalties in 1995, which were payable as a result of licensing
      fees received in 1993. At December 31, 1996 the Company had accrued an
      additional $280,000 liability to UFRFI for sublicense payments related to
      the $1 million Warner Lambert milestone payment earned in 1996. Such
      amount was paid in 1997.

      On May 1, 1993, the Company entered into a sublicensing agreement with
      Warner-Lambert. The agreement grants Warner-Lambert the right of first
      refusal in the event the Company decides to develop certain other licensed
      products under certain circumstances. Under the terms of the agreement,
      Warner-Lambert paid the Company $100,000 in May 1993 upon the execution of
      the agreement and $750,000 in October 1993 related to the filing of the
      investigational new drug application. The payments were recognized as
      revenue when the payments were received. Additional payments may be
      received for the completion of certain scientific milestones. The
      agreement provides for Warner-Lambert to pay the

      Company a royalty on net sales, as defined. On March 1, 1994,
      Warner-Lambert paid the Company $750,000 in consideration for the
      Company's research and development activities performed. In 1996, the
      Company earned an additional $1 million from Warner Lambert, of which
      $500,000 was receivable as of December 31,1996 and was collected in
      January, 1997. The agreement will terminate on the later of the last
      expiration date of a licensed patent or 10 years from Warner-Lambert's
      marketing of a licensed product.

      In February 1994, the Company entered into an exclusive sublicense
      agreement with Nippon Kayaku. Upon execution of the agreement, Nippon
      Kayaku paid the Company $225,000 for research and development performed.
      The sponsored research payment was recognized as revenue when the payment
      was received. Additional payments may be payable to the Company for the
      completion of certain scientific milestones. The agreement provides for
      Nippon Kayaku to pay the Company a royalty on net sales, as defined.

      In addition, Nippon Kayaku will reimburse the Company for direct costs
      incurred for preclinical studies performed prior to the agreement. Nippon
      Kayaku will also pay a running royalty of 2 percent of net sales as
      defined for 10 years in the event that Nippon Kayaku elects to manufacture
      the product. The agreement will terminate on the later of the last
      expiration of a licensed patent or 10 years from Nippon Kayaku's marketing
      of a licensed product in Japan.

      A director was issued options with an exercise price of $.32 per share to
      purchase 77,900 shares of common stock in connection with the exclusive
      sublicense agreement with Nippon Kayaku. The original option agreement
      stipulated that the options vested upon the completion of specified
      milestones and, accordingly, compensation expense was recorded for the
      portion of the options that had not vested through September 1994, at
      which time the Company amended the agreement to reflect vesting based upon
      time or the completion of specified milestones (see Note 8).

                                    * * * * *

                                      F-21



                                  EXHIBIT 11.1


                              SUNPHARM CORPORATION
               CALCULATION OF WEIGHTED AVERAGE SHARES OUTSTANDING


For twelve months ended December 31, 1997:

<TABLE>
<CAPTION>
                 TOTAL SHARES                            DAYS OUTSTANDING
                --------------                           ----------------

<S>                <C>           <C>                           <C>                             <C>        
                   3,708,879     thru  3/28                     87                              322,672,473
                   5,537,165     thru   4/2                      5                               27,685,825
                   5,608,101     thru  6/17                     76                              426,215,676
                   5,672,471     thru  7/31                     44                              249,588,724
                   5,732,471     thru 11/21                    113                              647,769,223
                   5,735,328     thru 12/18                     27                              154,853,856
                   5,737,828     thru 12/31                     13                               74,591,764
                                                         ----------------                     -------------
                                                               365                            1,903,377,541

                                        WEIGHTED AVERAGE SHARES           5,214,733
                                                                          =========

                                            NET LOSS                     (3,906,425)
                                           PER SHARE                          (0.75)
</TABLE>


For twelve months ended December 31, 1997:


           TOTAL SHARES               DAYS OUTSTANDING
           ------------               ----------------
             2,884,535    thru  6/22          173         499,024,555
             3,223,617    thru  7/22           30          96,708,510
             3,273,617    thru 12/31          162         530,325,954

             3,708,879      on 12/31            -                   -
                                       ----------       -------------
                                              365       1,126,059,019

            WEIGHTED AVERAGE SHARES           3,085,093
                                              =========

                 NET LOSS                    (2,836,609)
                 PER SHARE                        (0.92)




                  FOURTH AMENDMENT TO PATENT LICENSE AGREEMENT
                         WITH RESEARCH COMPONENT BETWEEN
               THE UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC.
                            AND SUNPHARM CORPORATION


     This Fourth Amendment to Patent License  Agreement with Research  Component
(hereinafter "Fourth Amendment") is entered into this 9TH day of September, 1996
(the "Effective  Date") between THE UNIVERSITY OF FLORIDA  RESEARCH  FOUNDATION,
INC., a not for profit corporation duly organized and existing under the laws of
the State of Florida (hereinafter "UFRFI") and SUNPHARM CORPORATION,  a Delaware
corporation (hereinafter "LICENSEE").

     WHEREAS,  LICENSEE  and  UFRFI  are  also  parties  to that  certain  First
Amendment to Patent License Agreement with Research Component dated December 30,
1992  (hereinafter  "First  Amendment"),  Second  Amendment  to  Patent  License
Agreement  with Research  Component  dated March 26, 1993  (hereinafter  "Second
Amendment")  and Third  Amendment  to Patent  License  Agreement  with  Research
Component dated November 15, 1994 (the "Third Amendment").

     WHEREAS,  UFRFI and LICENSEE  desire to make certain  other  changes to the
Agreement, as provided herein;

     NOW,  THEREFORE,  in  consideration  of the  premises  and  other  good and
valuable  consideration,  the  receipt  and  sufficiency  of  which  are  hereby
acknowledged, the parties hereto agree as follows:

     1. Section 1.2,  "Patent  Rights",  of the  Agreement is hereby  amended by
adding the issued United States patents and corresponding foreign patents and/or
patent applications listed in Exhibit A to this Fourth Amendment,  together with
any divisionals,  continuations,  continuations in part,  and/or  reissuances of
such patents and/or patent applications.

     2. Section 1.7, "Field of Use", of the Agreement is hereby amended to mean,
with  respect  to the  Patent  Rights  identified  on  Exhibit A to this  Fourth
Amendment,  "polyamine analogues and metal chelators,  their synthesis and their
use for any human or animal diagnostic and/or therapeutic indication."

     3. As  consideration  for the execution of this Fourth  Amendment by UFRFI,
LICENSEE  agrees that it will (I) enter into the Second  Amendment  to Corporate
Research  Agreement  in the form of  Exhibit C attached  hereto,  and (ii) pay a
one-time  license fee of $50,000 to UFRFI,  payable  one-half on signing by both
parties and one-half on January 1, 1997.

     4. As an inducement to LICENSEE to enter into this Fourth Amendment and the
Second Amendment to Corporate Research Agreement,  UFRFI represents and warrants
to LICENSEE  that (I) it owns the full and complete  title to the Patent  Rights
described in Exhibit A assigned,  licensed or otherwise  transferred  any rights
with  respect to such  Patent  Rights to any third  party  other  than  LICENSEE
hereunder  (other than  CIBA-GEIGY) and that any rights which CIBA- GEIGY had or
may have in such Patent Rights have been terminated;  provided, however, that no
representation or warranty is given as to those compounds  identified on Exhibit
B hereto;  and provided  further,  that LICENSEE  acknowledges  that the federal
government  has certain  rights in the Patent  Rights to the extent that federal
funds were applied in their development.

     5. All other  terms and  conditions  of the  agreement,  as  amended by the
First, Second,


<PAGE>


and Third  Amendments,  except as  expressly  modified or amended in this Fourth
Amendment, shall remain in full force and effect.

     6. This Fourth  Amendment shall be effective as of the Effective Date. This
Fourth  Amendment  may be  executed in  counterparts,  each of which shall be an
original but all of which, taken together, shall constitute one instrument.

     IN WITNESS  WHEREOF,  the parties have executed this Fourth Amendment as of
the date or dates set out below.

                                            THE UNIVERSITY OF FLORIDA
                                            RESEARCH FOUNDATION, INC.



Date: September 7, 1996                     By: /s/ Ronald M. Kudla
- -----------------                               ---------------------
                                            Name:   Ronald M. Kudla
                                            Title:  Director - OTL



                                            SUNPHARM CORPORATION

Date: September 9th, 1996                   By: /s/ Stefan Borg
                                                ---------------------
                                            Name:   Stefan Borg
                                            Title:  President & CEO

                                            Reviewed by UFRFI's Attorney:

                                                /s/ Gregory A. Nelson
                                                ---------------------
                                                    Gregory A. Nelson

                                            Sept 9, 1996

                                            (This attorney shall not be deemed a
                                            signatory to this agreement)



                                LOCKUP AGREEMENT

         This Lockup  Agreement  having an effective  date of December 31, 1996,
("Agreement"),  is entered into by and between the Mr. Phillip Tracy, Mr. Stefan
Borg, Dr. Robert Janicki, Dr. Robert Schoellhorn,  Mr. Jerry Jackson, Mr. Norman
Lipoff, Mr. Jacques Rejeange,  and Mr. George Schwartz (the members of the Board
of Directors of SunPharm  Corporation and collectively  referred to hereafter as
"Directors"),    the   University   of   Florida   Research   Foundation,   Inc.
("Foundation"),  and SunPharm Corporation  ("SunPharm"),  a Delaware corporation
whose principal office address is 4651 Salisbury Road, Suite 205,  Jacksonville,
Florida 32256.

                                   WITNESSETH

         WHEREAS,  SunPharm is a company engaged in the research and development
of certain chemical compounds; and

         WHEREAS,  Directors  and  Foundation  are  owners  of  common  stock of
SunPharm; and

         WHEREAS,  Directors and Foundation believe that the success of SunPharm
requires the active interest and support of its major Shareholders and therefore
desire to promote the best  interests of SunPharm and their mutual  interests by
agreeing to limit their  ability to transfer by sale or otherwise  the shares of
Common Stock of SunPharm owned by Shareholder as defined below:

         NOW THEREFORE,  for and in  consideration  of the above stated premises
and the mutual covenants  hereinafter set forth, and for other good and valuable
consideration, the parties hereby agree as set forth below.

         SECTION 1. DEFINITIONS. As used in this Agreement:

         "CHANGE OF CONTROL" means the happening of any of the following:

         (A) When any "person" as defined in Section 3(a)(9) of the Exchange Act
and as used in Sections 13(d) and 14(d) thereof,  including a "group" as defined
in Section  13(d) of the  Exchange  Act,  but  excluding  (I)  SunPharm  and any
subsidiary thereof,  (ii) Stefan Borg (SunPharm's  president and chief executive
officer on the Effective Date), and (iii) any employee benefit plan sponsored or
maintained  by SunPharm or its  subsidiary  (including  any trustee of such plan
acting as trustee),  directly or indirectly,  becomes the "beneficial owner" (as
defined in Rule 13d-3 under the Exchange Act, as amended from time to time),  of
securities  of SunPharm  representing  twenty-five  percent (25%) or more of the
combined voting power of SunPharm's then outstanding securities; or

         (B)  When,  during  any  period  of 12  consecutive  months  after  the
Effective Date, the individuals who, at the beginning of such period, constitute
the Board (the "Incumbent  Directors")  cease for any reason other than death to
constitute at least a majority thereof; provided however that a director who was
not a director at the beginning of such 12-month  period shall be deemed to have
satisfied  such  12-month  requirement  (and be an  Incumbent  Director) if such
director was elected by, or on the recommendation of or with the approval of, at
least  two-thirds  of the directors  who then  qualified as Incumbent  Directors
either  actually  (because they were directors at the beginning of such 12-month
period) or by prior operation of this paragraph; or


                                        1


<PAGE>


         (C) The occurrence of a transaction  requiring stockholder approval for
the  acquisition  of SunPharm by an entity other than SunPharm or its subsidiary
through purchase of assets, or by merger, or otherwise.

         "COMMISSION"shall  mean the Securities  and Exchange  Commission or any
other federal agency at the time administering the Securities Act.

         "COMMON STOCK" means the Common Stock, par value $.0001, of SunPharm.

         "EFFECTIVE DATE" means December 31, 1996.

         "EXCHANGE  ACT"  shall mean the  Securities  Exchange  Act of 1934,  as
amended,  or any similar  federal  statute and the rules and  regulations of the
Commission thereunder, all as the same shall be in effect at the time.

         "LOCKUP  SHARES"shall  mean all  shares  of  Common  Stock to which all
right,  title and interest owned by any  Shareholder as of the Effective Date of
this Agreement and all securities of SunPharm  convertible  into or exchangeable
for and any rights to purchase or acquire Common Stock of SunPharm including all
such stock of SunPharm now owned by any  Shareholder and his spouse as community
property or as separate property.  All references herein to the stock owned by a
Shareholder include the community interest of such Shareholder's  spouse in such
stock and all  obligations of a Shareholder  under this  Agreement  include like
obligations  on  the  part  of  his  spouse.  The  termination  of  the  marital
relationship of any Shareholder and his spouse for any reason shall not have the
effect of removing  any stock of SunPharm  otherwise  subject to this  agreement
from the coverage hereof.

         "PERMITTED  TRANSFERS" means any Sale of the Lockup Shares as permitted
in Sections  4,5,6 and 10 of this Agreement or any transfer or assignment of the
Lockup Shares in accordance with the Foundations's contractual commitments under
the published patent policies of the University of Florida.

         "PERSON"shall include an individual,  a corporation,  a partnership,  a
trust, or any other organization or entity.

         "REGISTRABLE  SECURITIES"  means any and all Lockup  Shares held by any
Shareholder  during  the  Term of  Agreement  issued  by  SunPharm  prior to the
Effective Date herein,  or other securities issued or issuable in respect of the
above upon any stock split, stock dividend, recapitalization or similar events.
         "SECURITIES  ACT" shall mean the Securities Act of 1933 as amended,  or
any similar  federal  statute and the rules and  regulations  of the  Commission
thereunder, all as the same shall be in effect at the time.

         "REGISTER",  "REGISTERED", AND "REGISTRATION" shall mean a registration
effected by preparing and filing a registration statement in compliance with the
Securities  Act, and the  declaration or ordering of the  effectiveness  of such
registration statement.


                                        2


<PAGE>


         "REGISTRATION  EXPENSES"  shall mean all  expenses,  other than Selling
Expenses,  incurred by SunPharm in complying  with Section 6 hereof,  including,
without  limitation,  all registration,  qualification and filing fees, exchange
listing fees, printing expenses,  escrow fees, fees and disbursements of counsel
for  SunPharm,  blue sky fees and expenses,  the expenses of any special  audits
incident to or required by such  registration (but excluding the compensation of
regular  employees of SunPharm which shall be paid in any event by SunPharm) and
the reasonable fees and disbursements of one counsel for all Shareholders.

         "SALE",  "SELL",  OR "SOLD"shall  mean and include,  either directly or
indirectly,  any sale, contract to sell or other disposition of Lockup Shares of
SunPharm,  including but not limited to a disposition by gift,  pledge, or other
form of inter vivos  transfer,  voluntary or  involuntary,  or  distribution  of
common stock subsequent to the date of this Agreement;  provided  however,  that
such definition  shall not include the exercise by any Shareholder of options or
warrants to purchase
 Common Stock in the definition of Lockup Shares.

         "SELLING  EXPENSES"  shall  mean all  underwriting  discounts,  selling
commissions and stock transfer taxes applicable to the securities  registered by
the Shareholders  and, except as set forth above, all fees and  disbursements of
counsel for any Shareholder.

         "SHAREHOLDER(S)"shall  mean the Directors and the  Foundation and their
respective heirs, legal representatives, administrators, and successors.

         "TERM OF  AGREEMENT"shall  mean the  period  from  the  Effective  Date
through December 31, 1999.

         SECTION 2. LIMITATION ON SALE OF LOCKUP SHARES. Shareholders agree that
no Lockup Shares or any interest therein shall be sold by any Shareholder except
for Permitted  Transfers and as otherwise  provided in this Agreement during the
Term of Agreement.  Any sale or attempted sale not made in compliance  with this
Agreement shall be void and of no effect.

         SECTION  3. ONE  YEAR  AGREEMENT  OF  SHAREHOLDERS  NOT TO SELL  LOCKUP
SHARES.  Except  for  Permitted  Transfers,  Shareholders  agree not to sell any
Lockup Shares from the Effective  Date of this  Agreement  through  December 31,
1997.

         SECTION 4. ONE YEAR AGREEMENT OF  SHAREHOLDERS  TO LIMIT SALE OF LOCKUP
SHARES.  The Shareholders agree to further limit their rights to sell the Lockup
Shares from January 1, 1998 through and including  December 31, 1998 as follows:
each  Shareholder  shall  have the  right to sell on and  after the first day of
January,  1998 and on and  after  the  first  day of each  month  thereafter  in
calendar  year  1998,  Two  Percent  (2.0%)  of the total of the  Lockup  Shares
(rounded  to the  nearest  share  number)  held  by said  Shareholder  as of the
Effective  Date of this  Agreement.  Shareholder  may at his\its option sell the
monthly amount of such shares on the first of each month, or may accumulate such
monthly  amounts of shares to be sold in whole or in part at any time thereafter
by  Shareholder.  Any right of  Shareholder to sell Lockup Shares as provided in
this Agreement is subject to  restrictions on sale of such shares as provided by
the Exchange Act.

         SECTION 5. ONE YEAR  AGREEMENT OF STEFAN BORG AND  FOUNDATION  TO LIMIT
SALE OF


                                        3


<PAGE>


LOCKUP SHARES. Stefan Borg and Foundation agree to further limit their rights to
sell the Lockup Shares from January 1, 1999 through and  including  December 31,
1999.  Stefan Borg and Foundation each shall have the right to sell on and after
January 1, 1999 and on and after the first of each month  thereafter in calendar
year 1999,  Four Percent (4%) of the total of the Lockup Shares  (rounded to the
nearest share number) held by Stefan Borg or Foundation  respectively  as of the
Effective  Date of this  Agreement.  Shareholder  may at his\its option sell the
monthly amount of such shares on the first of each month, or may accumulate such
monthly  amounts of shares to be sold in whole or in part at any time thereafter
by Stefan Borg or  Foundation.  Any right of Stefan Borg or  Foundation  to sell
said Lockup Shares as provided in this Agreement is subject to  restrictions  on
sale of such shares as provided by the  Exchange  Act. No other  Shareholder  is
subject to the provisions of this Section 5.

         SECTION 6.  SALE OF LOCKUP SHARES BY REGISTRATION.

         (A) NOTICE OF REGISTRATION. If SunPharm shall determine during the Term
of  Agreement  to register  any of its  securities  (other  than a  registration
relating solely to employee benefit plans, or a registration  relating solely to
a  Commission  Rule 145  transaction),  SunPharm  will I) promptly  give to each
Shareholder  written  notice  thereof;  and ii) use its best  lawful  efforts to
include in such registration (and any related  qualification under blue sky laws
or  other  compliance),  and in any  underwriting  involved  therein  all of the
Registrable  Securities  specified in a written request by  Shareholder(s)  made
within twenty (20) days after receipt of such written notice from  SunPharm,  by
such Shareholders.

         (B) UNDERWRITING The right of any Shareholder to registration hereunder
shall be conditioned upon such  Shareholder's  participation  (on the same terms
and  conditions as are  applicable to each other  selling  Shareholder)  in such
underwriting,  and the inclusion of Registrable  Securities in the  underwriting
shall be limited to the extent provided  herein.  SunPharm and all  Shareholders
proposing to distribute their securities  through such underwriting  shall enter
into an underwriting  agreement in customary form with the managing  underwriter
selected for such underwriting by SunPharm.

         Notwithstanding  anything  herein  to the  contrary,  if  the  managing
underwriter determines that marketing factors require a limitation of the number
of shares to be underwritten, then SunPharm shall so advise all Shareholders and
the number of shares that may be included in the  registration  and underwriting
shall  be  allocated   among  all   Shareholders  in  proportion  as  nearly  as
practicable,  to the respective  amounts of Registrable  Securities held by each
Shareholder at the time of filing the registration  statement. To facilitate the
allocation of shares in accordance with the above provisions, SunPharm may round
the number of shares  allocable  to any  Shareholder  to the nearest one hundred
(100) shares.

         If any Shareholder  disapproves of the terms of any such  underwriting,
he\it may elect to withdraw  therefrom  by written  notice to  SunPharm  and the
managing  underwriter,  delivered  not less than seven days before the effective
date of the registration  statement.  Any securities  voluntarily withdrawn from
such  underwriting by a Shareholder  shall be withdrawn from such  registration,
and continue to be subject to this Agreement such that such securities  shall be
withdrawn  from the  market  for the term  provided  herein  but not less than a
period  of one  hundred  twenty  (120)  days  after  the  effective  date of the
registration statement relating thereto, or such other shorter period of time as
the underwriters may require.


                                       4


<PAGE>


         (C) RIGHT TO TERMINATE  REGISTRATION.  SunPharm shall have the right to
terminate   or  withdraw  any   registration   initiated  by  it  prior  to  the
effectiveness of such registration whether or not any Shareholder has elected to
include securities in such registration.

         (D) EXPENSES OF REGISTRATION.  All Registration Expenses shall be borne
by  SunPharm.   Unless  otherwise  stated,  all  Selling  Expenses  relating  to
securities  registered  on  behalf  of the  Shareholders  shall  be borne by the
Shareholders pro rata on the basis of the number of shares so registered.

         SECTION 7.  REGISTRATION  PROCEDURES.  In the case of each registration
effected  by  SunPharm  pursuant  to this  Agreement,  SunPharm  will  keep each
Shareholder  advised in writing as to the initiation of each registration and as
to the completion thereof. At its expense, SunPharm will:

         (A) Prepare and file with the Commission a registration  statement with
respect  to such  securities  and use its best  lawful  efforts  to  cause  such
registration  statement to become and remain  effective for at least one hundred
twenty  (120)  days or until  the  distribution  described  in the  registration
statement has been completed.

         (B) Furnish  each  underwriter  such number of copies of a  prospectus,
including a preliminary  prospectus,  in conformity with the requirements of the
Securities  Act, and such other  documents as such  underwriter  may  reasonably
request  in  order  to  facilitate  the  public  sale  of  the  shares  by  such
underwriter,  and promptly furnish to each underwriter and Shareholder notice of
any  stop-order or similar  notice issued by the  Commission or any state agency
charged with the regulation of securities, and notice of any NASDAQ listing; and

         (C) Use its best  efforts  to cause all  Registrable  Securities  to be
listed  on each  securities  exchange  on which  similar  securities  issued  by
SunPharm are listed;  and if not so listed, use its best efforts to be listed on
the NASDAQ system.

         SECTION 8.  INDEMNIFICATION.

         (A) To the  extent  permitted  by law,  SunPharm  will  indemnify  each
Shareholder  participating in a registration pursuant to this Agreement, each of
its  officers,  directors,  partners,  employees  and  agents  and  each  person
controlling such Shareholder  within the meaning of Section 15 of the Securities
Act , and each underwriter, if any, and each person who controls any underwriter
within the meaning of Section 15 of the  Securities  Act,  against all expenses,
claims,  losses,  damages or  liabilities,  (or  actions  in  respect  thereof),
including  any  of the  foregoing  incurred  in  settlement  of any  litigation,
commenced or threatened, to the extent such expenses, claims, losses, damages or
liabilities arise out of or are based on any untrue statement (or alleged untrue
statement)  of  a  material  fact  contained  in  any  registration   statement,
prospectus,  offering circular or other document, or any amendment or supplement
thereto,  incident to any such  registration  or securities law  compliance,  or
based on any omission (or alleged  omission)  to state  therein a material  fact
required to be stated  therein or necessary to make the statements  therein,  in
light of the  circumstances  in which they were  made,  not  misleading,  or any
violation  by  SunPharm  of  the  Securities  Act  or  any  rule  or  regulation
promulgated  under the Securities Act applicable to SunPharm in connection  with
any such registration, qualification or compliance, and SunPharm


                                       5


<PAGE>


will  reimburse  each  such  Shareholder,   each  of  its  officers,  directors,
employees,  agents  and each  person  controlling  such  Shareholder,  each such
underwriter and each person who controls any such underwriter, for any legal and
any  other  expenses  reasonably  incurred  in  connection  with  investigation,
preparing or  defending  any such claim,  loss,  damage,  liability,  or action,
PROVIDED HOWEVER, that the indemnity contained herein shall not apply to amounts
paid  in  settlement  of any  claim,  loss,  damage,  liability  or  expense  if
settlement is effected  without the consent of SunPharm (which consent shall not
unreasonably be withheld), provided that SunPharm will not be liable in any such
case to the extent  that any such  claim,  loss,  damage,  liability  or expense
arises out of or is based on any untrue  statement or omission or alleged untrue
statement  or omission,  made in reliance  upon and in  conformity  with written
information  furnished to SunPharm by such  Shareholder,  controlling  person or
underwriter specifically for use therein. Notwithstanding the foregoing, insofar
as the  foregoing  indemnity  relates to any such untrue  statement  (or alleged
untrue  statement)  or omission  (or  alleged  omission)  made in a  preliminary
prospectus but eliminated or remedied in an amended  prospectus on file with the
Commission at the time the registration  statement  becomes  effective or in the
final  prospectus  filed  with the  Commission  pursuant  to Rule  424(b) of the
Commission, the indemnity agreement herein shall not inure to the benefit of any
underwriter if a copy of the final  prospectus filed pursuant to Rule 424(b) was
not furnished to the person or entity  asserting the loss,  liability,  claim or
damage at or prior to the time such  furnishing  is required  by the  Securities
Act.

         (B)  To  the  extent  permitted  by  law,  each  Shareholder  will,  if
Registrable  Securities  are  included  in  the  securities  as  to  which  such
registration, qualification or compliance is being effected, indemnify SunPharm,
each of its  directors  and officers,  each  underwriter,  if any, of SunPharm's
securities  covered by such a registration  statement,  each person who controls
SunPharm or such underwriter  within the meaning of Section 15 of the Securities
Act, and each other such  Shareholder,  each of its officers and  directors  and
each person controlling such Shareholder within the meaning of Section 15 of the
Securities Act,  against all claims,  losses damages and liabilities (or actions
in respect  thereof)  arising  out of or based on any untrue  statement  by such
Shareholder  (or alleged  untrue  statement) of a material fact contained in any
such registration statement, prospectus, offering circular or other document, or
any omission by such other  Shareholder (or alleged omission) to state therein a
material fact  required to be stated  therein or necessary to make the statement
therein not  misleading,  or any  violation by such  Shareholder  of any rule or
regulation  promulgated  under the Securities Act applicable to such Shareholder
and relating to action or inaction  required of such  Shareholder  in connection
with any such  registration,  qualification  or  compliance,  and will reimburse
SunPharm,   such  other  Shareholders,   such  directors,   officers,   persons,
underwriters  or  control  persons  for any legal or other  expenses  reasonably
incurred in connection  with  investigating  or defending any such claim,  loss,
damage,  liability or action, in each case to the extent, but only to the extent
that such untrue statement (or alleged untrue statement) or omission (or alleged
omission) is made in such registration statement,  prospectus, offering circular
or other  document in reliance upon and in conformity  with written  information
furnished to SunPharm by such Shareholder specifically for use therein; PROVIDED
HOWEVER,  that the indemnity contained herein shall not apply to amounts paid in
settlement of any claim, loss, damage,  liability or expense if effected without
the  consent  of the  Shareholder  (which  consent  shall  not  be  unreasonably
withheld).  Notwithstanding  the  foregoing,  the liability of each  Shareholder
under  this  subsection  (B)  shall be  limited  in an  amount  equal to the net
proceeds  from the sale of the  shares  sold by such  Shareholder,  unless  such
liability arises out of or is based on willful conduct by such  Shareholder.  In
addition,  insofar  as  the  foregoing  indemnity  related  to any  such  untrue
statement (or alleged untrue statement) or omission (or alleged omission)


                                       6


<PAGE>


made in a  preliminary  prospectus  but  eliminated  or  remedied  in an amended
prospectus on file with the  Commission at the time the  registration  statement
becomes  effective or in the final  prospectus  filed pursuant to Rule 424(b) of
the Commission, the indemnity agreement herein shall not inure to the benefit of
SunPharm,  any underwriter or (if there is no underwriter)  any Shareholder if a
copy of the final  prospectus filed pursuant to Rule 424(b) was not furnished to
the person or entity asserting the loss, liability, claim, or damage at or prior
to the time such furnishing is required by the Securities Act.

         (C) Each partly entitled to  indemnification  under this Section 8 (the
"Indemnified  Party")  shall  give  notice  to the  party  required  to  provide
indemnification  (the Indemnifying Party") promptly after such Indemnified Party
has actual knowledge of any claim as to which indemnity may be sought, and shall
permit the  Indemnifying  Party to assume  the  defense of any such claim or any
litigation  resulting  therefrom,  provided  that  counsel for the  Indemnifying
Party,  who shall  conduct  the  defense of such claim or  litigation,  shall be
approved by the  Indemnified  Party (whose  approval shall not  unreasonably  be
withheld),  and the  Indemnified  Party may  participate in such defense at such
party's expense,  and provided further that the failure of any Indemnified Party
to give notice as provided  herein shall not relieve the  Indemnifying  Party of
its obligation  under this  Agreement  unless the failure to give such notice is
materially  prejudicial to an Indemnifying Party's ability to defend such action
and provided further,  that the Indemnifying  Party shall not assume the defense
for matters as to which there is a conflict of interest between,  or separate or
different  defenses  available to,  Indemnifying Party and Indemnified Party. No
Indemnifying  Party,  in the  defense  of any such claim or  litigation,  shall,
except  with the  consent  of each  Indemnified  Party,  consent to entry of any
judgement  or  enter  into  any   settlement   which  does  not  include  as  an
unconditional  term  thereof  the giving by the  claimant or  plaintiff  to such
Indemnified  Party of a release  from all  liability in respect to such claim or
litigation. No Indemnified Party shall consent to entry of any judgment or enter
into any settlement without the consent of each Indemnifying Party.

         (D)  If  the  indemnification   provided  for  in  this  Section  8  is
unavailable to any Indemnified Party in respect of any losses,  claims,  damages
or liabilities  referred to therein,  then each  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 or
liabilities  (i) in such  proportion as is  appropriate  to reflect the relative
benefits  received  by SunPharm  on the one hand and all  Shareholders  offering
securities in the offering (the  "Selling  Shareholders")  on the other from the
offering of SunPharm  securities,  or (ii) if the allocation  provided by clause
(i)  above  is not  permitted  by  applicable  law,  in  such  proportion  as is
appropriate to reflect not only the relative  benefits referred to in clause (i)
above but also the  relative  fault of  SunPharm on the one hand and the Selling
Shareholder  on the other in connection  with the  statement or omissions  which
resulted in such losses,  claims,  damages or liabilities,  as well as any other
relevant,  equitable considerations.  The relative benefits received by SunPharm
on the one  hand  and the  Selling  Shareholder  on the  other  shall be the net
proceeds from the offering (before deducting  expenses)  received by SunPharm on
the one hand  the  Selling  Shareholder  on the  other.  The  relative  fault of
SunPharm  on the one hand and the  Selling  Shareholder  on the  other  shall be
determined by reference  to, among other  things,  whether the untrue or alleged
untrue statement of material fact or the omission or alleged omission to state a
material  fact  relates to  information  supplied  by SunPharm or by the Selling
Shareholder and the parties' relevant intent,  knowledge,  access to information
and opportunity to correct or prevent such statement or omission.

         SunPharm  and the Selling  Shareholder  agree that it would not be just
and equitable if


                                       7


<PAGE>


contribution  pursuant to this Section 8(D) were based solely upon the number of
persons  from  whom  contribution  was  requested  or by  any  other  method  of
allocation which does not take account of the equitable  considerations referred
to above in this  Section  8(D).  The amount  paid or payable by an  Indemnified
Party as a result of the losses,  claims,  damages and  liabilities  referred to
above in this  Section  8(D)  shall be  deemed  to  include  any  legal or other
expenses  reasonably  incurred  by such  indemnified  party in  connection  with
investigating or defending any such action or claim,
subject to the provisions of Section 8(C) hereof. Notwithstanding the provisions
of this Section 8(D), no Shareholder  shall be required to contribute any amount
or make any other payments under this  agreement  which in the aggregate  exceed
the  proceeds  received  by such  Shareholder.  No person  guilty of  fraudulent
misrepresentation  (within the meaning of the Securities  Act) shall be entitled
to  contribution  from  any  person  who  was  not  guilty  of  such  fraudulent
misrepresentation.

         (E)  Notwithstanding  the  foregoing  provision  of this  Section 8, if
pursuant  to an  underwritten  public  offering  of capital  stock of  SunPharm,
SunPharm,   the  Selling   Shareholder  and  the  underwriters   enter  into  an
underwriting  or purchase  agreement  relating to such offering  which  contains
provisions covering indemnification among the parties thereto in connection with
such offering,  the indemnification  provisions of this Section 8, to the extent
they are in conflict  therewith,  shall be deemed inoperative for the purpose of
such offering, except as to any parties to this Agreement who are not parties to
such subsequent underwriting or purchase agreement.

         SECTION 9.  CERTAIN INFORMATION.

         (A) As a condition to exercising the  registration  rights provided set
forth  herein,  each  Shareholder,  with respect to any  Registrable  Securities
included in any registration,  shall furnish SunPharm such information regarding
such Shareholder,  the Registrable  Securities and the distribution  proposed by
such  Shareholder as SunPharm may request in writing and as shall be required in
connection with any  registration,  qualification  or compliance  referred to in
Section 6.

         (B) The failure of any Shareholder to furnish the information requested
pursuant  to Section  9(A) shall not affect the  obligation  of  SunPharm  under
Section 6 to the remaining  Shareholder(s) who furnish such information  unless,
in the  reasonable  opinion of counsel to  SunPharm  or the  underwriters,  such
failure impairs or may impair the legality of the registration  statement or the
underlying offering.

         (C)  Each  Shareholder,  with  respect  to any  Registrable  Securities
included in any  registration,  shall  cooperate in good faith with SunPharm and
its underwriters in connection with such  registration,  including  placing such
shares in escrow or custody to facilitate the sale and distribution thereof.

         (D)  Each  Shareholder,  with  respect  to any  Registrable  Securities
included in any registration, shall make no further sales or other dispositions,
of offers  therefor,  of such  shares  under such  registration  if,  during the
effectiveness of such registration  statement, an intervening event should occur
which, in the opinion of counsel to SunPharm,  makes the prospectus  included in
such registration statement no longer comply with the Securities Act, until such
time as such Shareholder has received from the SunPharm copies of a new, amended
or supplemented prospectus complying with the Securities Act.

         SECTION 10. TRANSFEREES BOUND. The provisions of Sections 2, 3, 4 and 5
above shall not


                                       8


<PAGE>


apply to a transfer by sale (as such term is defined herein) by a Shareholder or
some of all his Lockup Shares to his spouse, his lineal descendants  (natural or
adopted),  his parents, his grandparents,  or his siblings,  or to an intervivos
trust  established  on behalf of any such persons.  Any such  transferees  shall
receive and hold the Lockup Shares subject to the terms of this  Agreement,  and
there shall be no further  transfer of such Lockup  shares  except in accordance
with the terms of this Agreement.  Any transferees of Lockup Shares,  regardless
of the method by which said transferees acquired said Lockup Shares and provided
that the  transfer is not void under  Section 2 herein,  shall be subject to the
terms of this  Agreement,  and shall,  prior to the  receipt of any such  Lockup
Shares, agree in writing to be bound by the terms hereof. Any purported transfer
which does not comply  with such  provision  shall be null and void.  Any rights
granted to a  Shareholder  under this  Agreement may be assigned to a transferee
under this Section 10 provided  that (i) such transfer may otherwise be effected
in accordance with applicable securities laws, and (ii) the Shareholder notifies
SunPharm in writing prior to the transfer and the  transferee  agrees in writing
to be bound by the provisions of this Agreement..

         SECTION  11.  LEGEND ON STOCK  CERTIFICATES..  SunPharm  will  cause to
appear on all stock  certificates  representing  the Lockup Shares a conspicuous
legend in such form as the Board of Directors may  determine,  stating that such
shares are subject to an agreement  which restricts the  transferability  of the
shares,  and  otherwise  describes  the  rights  which may be  exercised  by the
Shareholder thereof.

         SECTION 12.  SPECIFIC  ENFORCEMENT.  In view of the inadequacy of money
damages,  if any  Shareholder  or other  person  shall  fail to comply  with the
provisions of Sections 2, 3, 4 or 5 hereof,  SunPharm and the Shareholders shall
be entitled,  to the extent permitted by applicable law, to injunctive relief in
the  case  of  the  violation,  or  attempted  or  threatened  violation,  by  a
Shareholder or other person of any of the  provisions of such Sections,  or to a
decree compelling  specific  performance by a Shareholder or other person of any
such provisions, or to any other remedy legally allowed to them.

         SECTION  13.  VOID  TRANSFERS..  If any  Lockup  Shares  shall  be sold
otherwise than in accordance  with the terms and  conditions of this  Agreement,
such sale shall be void. The persons who would  otherwise have been  transferees
hereunder regarding such Lockup Shares shall have an
 "adverse claim" with the meaning of such term as used in the Uniform Commercial
Code of any state.  In addition to, and without  prejudice to, any and all other
rights or remedies which may be available to SunPharm and the Shareholders,  the
Shareholders  agree that SunPharm may, but shall have no obligation to, hold and
refuse to transfer any Lockup Shares, or any certificate  therefor,  tendered to
it for transfer if the transfer violates the provisions of the Agreement.

         SECTION 14. REISSUANCE OF STOCK SHARES.  SunPharm shall not transfer or
reissue any of its shares of stock in  violation  of this  Agreement  or without
requiring proof of compliance with this Agreement.

         SECTION 15. SPOUSES. The spouses of the Shareholders, if any, are fully
aware of,  understand  and fully  consent to and agree to the  provisions of the
Agreement and its binding effect upon any community  property  interest they may
now  or  hereafter  own.  They  agree  that  the   termination  of  the  marital
relationship of any Shareholder for any reason or their death shall not have the
effect of removing any Lockup Shares otherwise subject to the Agreement from its
coverage. Their awareness,  understanding,  consents and agreement are evidenced
by their signing


                                       9


<PAGE>


this  Agreement.  All  stock  described  in this  Agreement  shall  include  the
community property interest of the spouse of a Shareholder.

         SECTION 16. EVENTS OF TERMINATION This Agreement shall terminate upon a
change of control of SunPharm or by the mutual agreement of the parties hereto.

         SECTION  17.  NOTICES..  All  notices  and  communications  required or
permitted to be given or made under this Agreement shall be in writing and shall
be deemed to have been duly given or made when sent by mail, postage paid:


         (A) If to Foundation, to:          Dr. Arnold Heggestad
                                            Executive Director
                                            University of Florida
                                            Research Foundation, Inc.
                                            P. O. Box 11550
                                            Gainesville, Florida       32610

             and to:                        Dr. Karen Holbrook
                                            Vice President
                                            University of Florida
                                            223 Grinter Hall
                                            Gainesville, Florida 32611

         (B) If to SunPharm,  to the  attention of Mr.  Stefan Borg,  President,
SunPharm  Corporation,  4651 Salisbury Road, Suite 205,  Jacksonville,  Florida,
32256

         (C) If to any  Director,  to the address last shown on the stock record
books of SunPharm, or, in each case, at such other address as may hereafter have
been  designated  most  recently in writing,  with  specific  reference  to this
Section, by the addressee to the addressor.

         SECTION 18.  BINDING  FORCE;  AMENDMENT;  SEVERABILITY.  This Agreement
shall be binding on the parties  upon  execution  by SunPharm  and by all of the
Shareholders,  and may be amended, waived, discharged or terminated by a written
instrument  signed  by  each of the  shareholders;  NOTWITHSTANDING  THE  ABOVE,
Directors agree that, in the event Directors holding a two-thirds (2/3) majority
of the Lockup Shares shall vote in favor of such amendment,  waiver,  discharge,
or termination, each Director will thereafter take such actions as a Shareholder
as  are  requested  and  necessary  for  the  amendment,  waiver,  discharge  or
termination to have full force and effect.  PROVIDED HOWEVER, that if any of the
rights of a  Shareholder  are  adversely  affected  by such  amendment,  waiver,
discharge,  or termination  separately from the rights of other  Shareholders of
the same class of Lockup  Shares,  then in such instance the written  consent of
the Shareholder adversely affected shall be required.

         The invalidity or unenforceability of any particular provisions of this
Agreement shall not affect the other provisions hereof, and this Agreement shall
be construed in all respects as if such invalid or unenforceable provisions were
omitted.

         SECTION 19. DATE OF  TERMINATION.  This  Agreement  shall  terminate on
December 31, 1999,  unless its term is extended by the written  agreement of the
parties as provided in Section 18.


                                       10


<PAGE>


         SECTION 20.  MISCELLANEOUS..  This Agreement (a) constitutes the entire
agreement  and  supersedes  for  existing  one  and  all  prior   agreement  and
understandings,  both  written and oral,  among the parties  with respect to the
subject  matter  hereof,  (b) may be executed in several  counterparts,  each of
which shall be deemed an original, and all of which shall constitute one and the
same  instrument,  (c) shall inure to the benefit of, and be binding  upon,  the
successors, assigns, legatees,  distributees, legal representatives and heirs of
each party and is not intended to confer upon any person, other than the parties
and their permitted  successors and assigns,  any rights or remedies  hereunder,
and (d) shall be governed in all respects,  including  validity,  interpretation
and effect, by the laws of the State of Delaware without respect to the conflict
of laws rules of such state.  The captions in this Agreement are for convenience
of reference only and shall not affect its interpretation in any respect.

         SECTION 21. EFFECTIVE DATE. The effective date of this Agreement is the
date first above written.

         IN WITNESS WHEREOF, the undersigned have hereunto set their hands as of
the day and year first above written.

WITNESS:                                    UNIVERSITY OF FLORIDA
                                            RESEARCH FOUNDATION

                                       By  /s/ ARNOLD A. Heggestad
                                           -------------------------------
                                               Arnold A. Heggestad
                                               Its Executive Director

                                            SUNPHARM CORPORATION

                                       By  /s/ STEFAN Borg
                                           -------------------------------
                                               Stefan Borg, its President

                                            SHAREHOLDERS

                                           /s/ RS JANICKI
                                           -------------------------------
                                               Dr. Robert S. Janicki

                                           /s/ JERRY T. Jackson
                                           -------------------------------
                                               Jerry T. Jackson


                                       11


<PAGE>


                                           /s/ NORMAN M. LIPOFF
                                           -------------------------------
                                               Norman Lipoff

                                           /s/ J REJEANGE
                                           -------------------------------
                                               Jacques Rejeange

                                           /s/ GEORGE B. Schwartz
                                           -------------------------------
                                               George B. Schwartz

                                           /s/ ROBERT A. Schoellhorn
                                           -------------------------------
                                               Robert A. Schoellhorn

                                           /s/ PHILLIP R. Tracy
                                           -------------------------------
                                               Phillip R. Tracy

                                           /s/ STEFAN Borg
                                           -------------------------------
                                               Stefan Borg


                                       12



                                 FIFTH AMENDMENT
                                     TO THE
                PATENT LICENSE AGREEMENT WITH RESEARCH COMPONENT
                                     BETWEEN
                 UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC.
                                       AND
                              SUNPHARM CORPORATION


THIS FIFTH  AMENDMENT TO THE PATENT LICENSE  AGREEMENT  WITH RESEARCH  COMPONENT
(hereinafter  "Fifth  Amendment")  is entered  into this __26__ day of December,
1997  (the  "Effective   date")  between  the  University  of  Florida  Research
Foundation, Inc., a not-for-profit corporation duly organized and existing under
the laws of the State of Florida (hereinafter "UFRFI") and SunPharm Corporation,
a Delaware corporation (hereinafter "LICENSEE").

                                    RECITALS

     Whereas,  LICENSEE  and UFRFI are parties to that  certain  Patent  License
Agreement  with  Research   Component   dated  December  9,  1991   (hereinafter
"Agreement")  providing LICENSEE the exclusive worldwide rights to commercialize
certain Licensed Products and Licensed Processes (as defined in the Agreement);

     Whereas,  LICENSEE and UFRFI are also parties that certain First  Amendment
to Patent  License  Agreement with Research  Component  dated December 30, 1992,
Second Amendment to Patent License Agreement with Research Component dated March
26, 1993,  Third Amendment to Patent License  Agreement with Research  Component
dated November 15, 1994 , and Fourth Amendment to Patent License  Agreement with
Research Component dated September 9, 1996;

     Whereas,  UFRFI and LICENSEE  desire to make certain  other  changes to the
Agreement, as provided herein'

     NOW,  THEREFORE,  in  consideration  of the  premises  and  other  good and
valuation  consideration,  the  receipt  and  sufficiency  of which  are  hereby
acknowledged, the parties hereto agree as follows;

     1. Section 6 and Section 7 of the  Agreement  shall be amended and restated
as follows:

                         ARTICLE VI - PATENT PROSECUTION

          6.1 ALLOCATION OF RESPONSIBILITIES. During the term of this Agreement,
     LICENSEE shall be responsible  for filing,  prosecuting and maintaining the
     Patent Rights in the name of UFRFI in the United States and at least in the
     foreign countries listed in Appendix B hereto. LICENSEE shall retain patent
     counsel of its choosing but reasonably  acceptable to UFRFI. UFRFI shall be
     given reasonable  opportunity to discuss and advise LICENSEE with regard to
     LICENSEE's selection of patent counsel and the patenting activities.  UFRFI
     shall  cooperate with LICENSEE by providing all  information  and executing
     all documents reasonably necessary for LICENSEE to perform its obligations.
    

          6.2  ABANDONMENT OF PATENT RIGHTS.  If LICENSE  intends to abandon all
     claims  under  a  patent  application  contained  in  Patent  Rights  in  a
     particular  jurisdiction,  it will  provide  UFRFI  with a  written  notice
     ("Notice  of  Abandonment")   thereof.   Upon  receipt  of  the  Notice  of
     Abandonment,  UFRFI may, by written  notice to LICENSEE,  elect to continue
     the  prosecution  of such  application.  LICENSEE  may  assume  that  UFRFI
     approves  of any  proposed  abandonment  if it does not  receive  a written
     response  within  ten (10)  business  days  from  delivery  of a Notice  of
     Abandonment.

<PAGE>


          6.3  PATENTING  COSTS.  Payment of all fees and costs  relating to the
     filing,  prosecution,  and  maintenance  of the Patent  Rights shall be the
     responsibility of LICENSEE. If UFRFI elects not to abandon Patent Rights as
     provided in Section 6.2 above, the future costs relating to the prosecution
     and  maintenance  of such Patent Rights shall be borne by UFRFI;  provided,
     however,  that  LICENSEE  shall  reimburse  UFRFI for any such  costs  upon
     issuance of a patent  containing  claims which were contained in the Notice
     of Abandonment.

          6.4 REPORTING AND  COORDINATION.  LICENSEE shall keep UFRFI advised as
     to all  developments  with  respect to its  patenting  activities  (such as
     invention  disclosures,  actions  before patent  offices,  status of patent
     applications,  etc.)  At  meetings  or  telephone  conferences  to be  held
     quarterly with representatives of LICENSEE, patent counsel of LICENSEE, and
     UFRFI.  In  addition,  LICENSEE  shall  provide  UFRFI  with  copies of all
     relevant  documents  filed  with or  received  from  the  U.S.  Patent  and
     Trademark  Office and its foreign  equivalents  relating to the prosecution
     and maintenance of the Patent Rights.

          6.5  REINTERVENTION BY UFRFI. If LICENSEE fails to take actions in the
     prosecution or maintenance of Patent Rights which are necessary to preserve
     substantial  Patent Rights,  UFRFI shall have the right to provide  written
     notice to LICENSEE  requesting  that such action be taken. If LICENSEE does
     not take such action  within  thirty (30) days from  receipt of such notice
     (or such shorter  period as necessary to meet the  applicable  statutory of
     procedural  deadline).  UFRFI  shall have the right to take such  action in
     place of LICENSEE.

                           ARTICLE VII - INFRINGEMENT

          7.1  INFORMATION.  A party shall  inform the other party in writing of
     any alleged  infringement  of the Patent Rights by a third party and of any
     available evidence promptly after receiving notice of such infringement.

          7.2 DEFENSE AGAINST INFRINGEMENT BY LICENSEE.  LICENSEE shall have the
     right, but shall not be obligated, to bring an action against any infringer
     of the Patent Rights.  UFRFI may join LICENSEE as a party  plaintiff in any
     such suit, and LICENSEE may have UFRFI joined as a party-plaintiff,  if the
     law of the  country or state  where such suit is brought so  requires.  Any
     voluntary  joinder  by  UFRFI  is at  its  own  expense.  If  prior  to the
     initiation  of an  infringement  action UFRFI agrees to share the costs and
     expenses  associated with the  infringement  action  (including  LICENSEE's
     attorneys' fees), any recovery or damages for past infringement  awarded in
     such action  shall be shared  equally.  If UFRFI  decides not to share such
     costs and expenses,  LICENSEE may retain any recovery or damages awarded in
     such action.

          7.3 DEFENSE  AGAINST  INFRINGEMENT  BY UFRFI. If within six (6) months
     after having been notified of any alleged infringement or such shorter time
     proscribed by law, LICENSEE has been unsuccessful in persuading the alleged
     infringer to desist,  and LICENSEE has not brought an infringement  action,
     or if LICENSEE  notifies  UFRFI at any time prior  thereto of its intention
     not to bring  suit  against  any  alleged  infringer,  UFRFI  may  bring an
     infringement  action at its own cost and risk. The terms regarding  joinder
     and  sharing in awards and  damages  set forth in Section  7.2 above  apply
     mutatis mutandis.

          7.4  SETTLEMENTS.  No settlement,  consent judgment or other voluntary
     final  disposition of the infringement suit may be entered into without the
     consent  of the  other  party,  which  consent  shall not  unreasonably  be
     withheld.


<PAGE>


          7.5 COOPERATION.  In any infringement suit brought by a party pursuant
     to this Agreement, the other party shall, at the request and expense of the
     party  initiating  such suit,  cooperate in all respects and, to the extent
     possible,  have its employees  testify when  requested  and make  available
     relevant records, papers, information, samples, specimens, and the like.

          7.6 LOSS OF PATENT RIGHTS.  In the event that the alleged infringer or
     a third  party  bringing  a patent  infringement  action  against  UFRFI or
     LICENSEE  prevails,  LICENSEE  shall  be  entitled  to  deduct  damages  or
     royalties  payable to third  parties  from any  payments due to UFRFI under
     this Agreement,  provided,  however, that such payments hall not be reduced
     by more than fifty percent (50%).

                                            THE UNIVERSITY OF FLORIDA
                                            RESEARCH FOUNDATION, INC.

Date:  12/26/97                             By:  /s/ AA Heggestad
       --------                                  ----------------------
                                            Name:    AA Heggestad, PhD
                                                     ------------------
                                            Title:   Executive Director
                                                     ------------------

                                            SUNPHARM CORPORATION


Date:  December 23, 1997                    By: /s/ Stefan Borg
       -----------------                        ---------------
                                            Name:   Stefan Borg
                                                    -----------
                                            Title:  President
                                                    -----------



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THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM (A) SUNPHARM
CORPORATION  BALANCE SHEET AT DECEMBER 31, 1997 AND STATEMENT OF OPERATIONS  FOR
YEAR ENDED  DECEMBER  31, 1997 AND IS  QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH (B) FORM 10-KSB FOR YEAR ENDED DECEMBER 31, 1997.
(A)  Identify specific financial statements.
(B)  Identify filing.
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