The Phase II study will assess the safety and efficacy of Archexin when used in combination with both carboplatin and paclitaxel as a second-line therapy in subjects who are platinum-sensitive following their first relapse. The study will be conducted at multiple centers in the United States, and subjects will be randomized to receive either carboplatin/paclitaxel or carboplatin/paclitaxel/Archexin. Various measures of clinical benefit will be assessed.

Ovarian cancer is the fifth most common cancer among women, and it causes more deaths than any other type of female reproductive cancer.

“Treatment options are limited for patients who are stricken with ovarian cancer, therefore we look forward to investigating Archexin as a potential combination treatment for this disease.” said Rick Soni, President of Rexahn. “To date, Archexin has demonstrated promising safety profile, and it has been granted orphan drug designation in ovarian cancer and several other solid tumors by the FDA. We expect to report preliminary Phase IIa results from our pancreatic cancer trial with Archexin later this year.”

About Archexin®
Archexin is a first-in-class, potent Akt protein kinase inhibitor with potential utility to inhibit cancer cell survival and proliferation, angiogenesis and drug resistance. Based upon Phase I clinical trial data, Archexin has an excellent human safety profile, with fatigue being the only side effect. Archexin has FDA Orphan drug designation for five different cancer types, including renal cell carcinoma, glioblastoma, pancreatic, stomach and ovarian cancers.

About Rexahn Pharmaceuticals, Inc.
Rexahn Pharmaceuticals is a clinical stage pharmaceutical company dedicated to developing and commercializing first in class and market leading therapeutics for cancer, CNS disorders, sexual dysfunction and other unmet medical needs. Rexahn currently has three drug candidates in Phase II clinical trials, Archexin®, Serdaxin®, and Zoraxel™ and a robust pipeline of preclinical compounds to treat multiple cancers and CNS disorders. Rexahn also operates key R&D programs of nano-medicines, 3D-GOLD, and TIMES drug discovery platforms. For more information, please visit www.rexahn.com.

Safe Harbor
To the extent any statements made in this press release deal with information that is not historical, these are forward-looking statements under the Private Securities Litigation Reform Act of 1995. Such statements include, but are not limited to, statements about Rexahn’s plans, objectives, expectations and intentions with respect to future operations and products and other statements identified by words such as “will,” “potential,” “could,” “can,” “believe,” “intends,” “continue,” “plans,” “expects,” “anticipates,” “estimates,” “may,” other words of similar meaning or the use of future dates. Forward-looking statements by their nature address matters that are, to different degrees, uncertain. Uncertainties and risks may cause Rexahn’s actual results to be materially different than those expressed in or implied by Rexahn’s forward-looking statements. For Rexahn, particular uncertainties and risks include, among others, the difficulty of developing pharmaceutical products, obtaining regulatory and other approvals and achieving market acceptance; the marketing success of Rexahn’s licensees or sublicensees; the success of clinical testing; and Rexahn’s need for and ability to obtain additional financing. More detailed information on these and additional factors that could affect Rexahn’s actual results are described in Rexahn’s filings with the Securities and Exchange Commission, including its most recent annual report on Form 10-K and subsequent quarterly reports on Form 10-Q. All forward-looking statements in this news release speak only as of the date of this news release. Rexahn undertakes no obligation to update or revise any forward-looking statement, whether as a result of new information, future events or otherwise.

Rick Soni, President of Rexahn, noted, “We are very pleased to obtain this additional patent coverage for RX-1792 in Japan, which broadens and strengthens our global intellectual property position. RX-1792 continues to demonstrate exciting anti-proliferative and anti-tumor effects in preclinical studies, and we look forward to accelerating its development.”
Preclinical studies have shown that RX-1792 inhibits in vitro proliferation of cancer cells derived from human solid tumors, including drug-resistant cells, by inhibiting EGFR tyrosine kinase. RX-1792 has also inhibited tumor growth in xenograft human tumor models.

About Rexahn Pharmaceuticals, Inc.
Rexahn Pharmaceuticals is a clinical stage pharmaceutical company dedicated to developing and commercializing first in class and market leading therapeutics for cancer, CNS disorders, sexual dysfunction and other unmet medical needs. Rexahn currently has three drug candidates in Phase II clinical trials, Archexin®, Serdaxin®, and Zoraxel™ and a robust pipeline of preclinical compounds to treat multiple cancers and CNS disorders. Rexahn also operates key R&D programs of nano-medicines, 3D-GOLD, and TIMES drug discovery platforms. For more information, please visit www.rexahn.com.

Safe Harbor
To the extent any statements made in this press release deal with information that is not historical, these are forward-looking statements under the Private Securities Litigation Reform Act of 1995. Such statements include, but are not limited to, statements about Rexahn’s plans, objectives, expectations and intentions with respect to future operations and products and other statements identified by words such as “will,” “potential,” “could,” “can,” “believe,” “intends,” “continue,” “plans,” “expects,” “anticipates,” “estimates,” “may,” other words of similar meaning or the use of future dates. Forward-looking statements by their nature address matters that are, to different degrees, uncertain. Uncertainties and risks may cause Rexahn’s actual results to be materially different than those expressed in or implied by Rexahn’s forward-looking statements. For Rexahn, particular uncertainties and risks include, among others, the difficulty of developing pharmaceutical products, obtaining regulatory and other approvals and achieving market acceptance; the marketing success of Rexahn’s licensees or sublicensees; the success of clinical testing; and Rexahn’s need for and ability to obtain additional financing. More detailed information on these and additional factors that could affect Rexahn’s actual results are described in Rexahn’s filings with the Securities and Exchange Commission, including its most recent annual report on Form 10-K and subsequent quarterly reports on Form 10-Q. All forward-looking statements in this news release speak only as of the date of this news release. Rexahn undertakes no obligation to update or revise any forward-looking statement, whether as a result of new information, future events or otherwise.

About RX-3117
RX-3117 is a small molecule, new chemical entity (NCE), nucleoside compound that inhibits DNA methyltransferase, a cyclin-dependent kinase, and DNA synthesis. Potential indications of RX-3117 are solid tumors including colon, lung and pancreatic cancers. RX-3117 has demonstrated its ability to overcome cancer drug resistance in cancer cells, in particular, gemcitabine-resistance in the human lung cancer cell. The US and European patent issued for RX-3117 claims composition of matter, synthesis and methods (2008 and 2010, respectively).

About Rexahn Pharmaceuticals, Inc.
Rexahn Pharmaceuticals is a clinical stage pharmaceutical company dedicated to developing and commercializing first in class and market leading therapeutics for cancer, CNS disorders, sexual dysfunction and other unmet medical needs. Rexahn currently has three drug candidates in Phase II clinical trials, Archexin®, Serdaxin®, and Zoraxel™ – all potential best in class therapeutics – and a robust pipeline of preclinical compounds to treat multiple cancers and CNS disorders. Rexahn also operates key R&D programs of nano-medicines, 3D-GOLD, and TIMES drug discovery platforms. For more information, please visit www.rexahn.com.

Safe Harbor
To the extent any statements made in this press release deal with information that is not historical, these are forward-looking statements under the Private Securities Litigation Reform Act of 1995. Such statements include, but are not limited to, statements about Rexahn’s plans, objectives, expectations and intentions with respect to future operations and products and other statements identified by words such as “will,” “potential,” “could,” “can,” “believe,” “intends,” “continue,” “plans,” “expects,” “anticipates,” “estimates,” “may,” other words of similar meaning or the use of future dates. Forward-looking statements by their nature address matters that are, to different degrees, uncertain. Uncertainties and risks may cause Rexahn’s actual results to be materially different than those expressed in or implied by Rexahn’s forward-looking statements. For Rexahn, particular uncertainties and risks include, among others, the difficulty of developing pharmaceutical products, obtaining regulatory and other approvals and achieving market acceptance; the marketing success of Rexahn’s licensees or sublicensees; the success of clinical testing; and Rexahn’s need for and ability to obtain additional financing. More detailed information on these and additional factors that could affect Rexahn’s actual results are described in Rexahn’s filings with the Securities and Exchange Commission, including its most recent annual report on Form 10-K and subsequent quarterly reports on Form 10-Q. All forward-looking statements in this news release speak only as of the date of this news release. Rexahn undertakes no obligation to update or revise any forward-looking statement, whether as a result of new information, future events or otherwise.

About RX-3117
RX-3117 is a small molecule, new chemical entity (NCE), nucleoside compound that inhibits DNA methyltransferase, a cyclin-dependent kinase, and DNA synthesis. Potential indications of RX-3117 are solid tumors including colon, lung and pancreatic cancers. RX-3117 has demonstrated its ability to overcome cancer drug resistance in cancer cells, in particular, gemcitabine-resistance in the human lung cancer cell. The US and European patent issued for RX-3117 claims composition of matter, synthesis and methods (2008 and 2010, respectively).

About Rexahn Pharmaceuticals, Inc.
Rexahn Pharmaceuticals is a clinical stage pharmaceutical company dedicated to developing and commercializing first in class and market leading therapeutics for cancer, CNS disorders, sexual dysfunction and other unmet medical needs. Rexahn currently has three drug candidates in Phase II clinical trials, Archexin®, Serdaxin®, and Zoraxel™ – all potential best in class therapeutics – and a robust pipeline of preclinical compounds to treat multiple cancers and CNS disorders. Rexahn also operates key R&D programs of nano-medicines, 3D-GOLD, and TIMES drug discovery platforms. For more information, please visit www.rexahn.com.

Safe Harbor
To the extent any statements made in this press release deal with information that is not historical, these are forward-looking statements under the Private Securities Litigation Reform Act of 1995. Such statements include, but are not limited to, statements about Rexahn’s plans, objectives, expectations and intentions with respect to future operations and products and other statements identified by words such as “will,” “potential,” “could,” “can,” “believe,” “intends,” “continue,” “plans,” “expects,” “anticipates,” “estimates,” “may,” other words of similar meaning or the use of future dates. Forward-looking statements by their nature address matters that are, to different degrees, uncertain. Uncertainties and risks may cause Rexahn’s actual results to be materially different than those expressed in or implied by Rexahn’s forward-looking statements. For Rexahn, particular uncertainties and risks include, among others, the difficulty of developing pharmaceutical products, obtaining regulatory and other approvals and achieving market acceptance; the marketing success of Rexahn’s licensees or sublicensees; the success of clinical testing; and Rexahn’s need for and ability to obtain additional financing. More detailed information on these and additional factors that could affect Rexahn’s actual results are described in Rexahn’s filings with the Securities and Exchange Commission, including its most recent annual report on Form 10-K and subsequent quarterly reports on Form 10-Q. All forward-looking statements in this news release speak only as of the date of this news release. Rexahn undertakes no obligation to update or revise any forward-looking statement, whether as a result of new information, future events or otherwise.

RX-3117 is a small molecule antimetabolite for the treatment of solid tumors.

“Preclinical studies demonstrate RX-3117 to have exciting anti-cancer properties, and we look forward to moving this compound into clinical development,” said Rick Soni, President and COO of Rexahn. “We will continue to develop RX-3117, which has potential therapeutic applications in a broad range of cancers, including colon, lung and pancreatic cancer.”

In September 2009, Rexahn entered into a commercialization and development agreement with Teva Pharmaceutical Industries Limited for RX-3117. Under the agreement, Rexahn is eligible to receive development, regulatory and sales milestone payments, as well as royalties on net sales worldwide.

About RX-3117
RX-3117 is a small molecule, new chemical entity (NCE), nucleoside compound that inhibits DNA methyltransferase, a cyclin-dependent kinase, and DNA synthesis. Potential indications of RX-3117 are solid tumors including colon, lung and pancreatic cancers. RX-3117 has demonstrated its ability to overcome cancer drug resistance in cancer cells, in particular, gemcitabine-resistance in the human lung cancer cell. The US and European patent issued for RX-3117 claims composition of matter, synthesis and methods (2008 and 2010, respectively).

About Rexahn Pharmaceuticals, Inc.
Rexahn Pharmaceuticals is a clinical stage pharmaceutical company dedicated to developing and commercializing first in class and market leading therapeutics for cancer, CNS disorders, sexual dysfunction and other unmet medical needs. Rexahn currently has three drug candidates in Phase II clinical trials, Archexin®, Serdaxin®, and Zoraxel™, and a robust pipeline of preclinical compounds to treat multiple cancers and CNS disorders. Rexahn also operates key R&D programs of nano-medicines, 3D-GOLD, and TIMES drug discovery platforms. For more information, please visit www.rexahn.com.

Safe Harbor
To the extent any statements made in this press release deal with information that is not historical, these are forward-looking statements under the Private Securities Litigation Reform Act of 1995. Such statements include, but are not limited to, statements about Rexahn’s plans, objectives, expectations and intentions with respect to future operations and products and other statements identified by words such as “will,” “potential,” “could,” “can,” “believe,” “intends,” “continue,” “plans,” “expects,” “anticipates,” “estimates,” “may,” other words of similar meaning or the use of future dates. Forward-looking statements by their nature address matters that are, to different degrees, uncertain. Uncertainties and risks may cause Rexahn’s actual results to be materially different than those expressed in or implied by Rexahn’s forward-looking statements. For Rexahn, particular uncertainties and risks include, among others, the difficulty of developing pharmaceutical products, obtaining regulatory and other approvals and achieving market acceptance; the marketing success of Rexahn’s licensees or sublicensees; the success of clinical testing; and Rexahn’s need for and ability to obtain additional financing. More detailed information on these and additional factors that could affect Rexahn’s actual results are described in Rexahn’s filings with the Securities and Exchange Commission, including its most recent annual report on Form 10-K and subsequent quarterly reports on Form 10-Q. All forward-looking statements in this news release speak only as of the date of this news release. Rexahn undertakes no obligation to update or revise any forward-looking statement, whether as a result of new information, future events or otherwise.