Rexahn Pharmaceuticals, Inc. (NYSE Amex: RNN), a clinical stage pharmaceutical company developing and commercializing potential best in class oncology and CNS therapeutics, today announced the publication of a research article in Journal of Medicinal Chemistry [55: 4521-4525, 2012] on the anti-tumor activity of its RX-3117 compound. The data demonstrates the synthesis of RX-3117 and its 2’-deoxy analogue, as well as its in vitro cell-line activity and strong in vivo anti-tumor effect. “This study provides further evidence of RX-3117’s potential as an anti-cancer compound,” said Rick Soni, President of Rexahn. “In the preclinical study, RX-3117 significantly inhibited growth of human cancer cells in vitro and the growth of tumors in in vivo models of nude mice.” About RX-3117 RX-3117 is a small molecule, new chemical entity (NCE) and nucleoside compound. Potential indications of RX-3117 are solid tumors including colon, lung and pancreatic cancers. In preclinical trials, RX-3117 has demonstrated its ability to overcome cancer drug resistance in cancer cells, in particular, gemcitabine-resistance in the human lung cancer cell. Rexahn has been awarded patents for RX-3117 in the US, China, Europe, Korea and Mexico. 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.