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WALTHAM, Mass., Aug. 17, 2011 /PRNewswire/ -- Syndax Pharmaceuticals, a clinical-stage epigenetics oncology company, today announced allowance by the European Patent Office for the patent application titled "N-(2-AMINOPHENYL)-4[N-(PYRIDINE-3-YL) - METHOXYCARBONYL - AMINOMETHYL]-BENZAMINE (MS-275) POLYMORPH B." This allowance follows the recent US issuance which was granted in June adding to the extensive patent estate for the Company's lead product, entinostat.

The patent covers the novel polymorph form B of the oral histone deacetylase inhibitor, entinostat, which is the specific polymorph being developed by Syndax for combination therapy with aromatase inhibitors for metastatic breast cancer and epidermal growth factor receptor tyrosine kinase inhibitors for advanced non-small cell lung cancer.