Enanta Pharmaceuticals, Inc., a biotechnology company, engages in the development of small molecule drugs for the infectious disease areas. Its product candidates include ABT-450, an inhibitor of NS3 protease that is in Phase III clinical trials for the treatment of hepatitis C virus (HCV) infection; EDP-239, an NS5A Inhibitor for HCV infection; EDP-546, a Cyclophilin inhibitor, which is in preclinical studies for HCV infection treatment; and Nucleotide Polymerase inhibitor for HCV infection. The company also develops EDP-788, an intravenous drug for the treatment of methicillin-resistant Staphylococcus aureus bacteria. It has collaboration and license agreements with Novartis Institutes for BioMedical Research, Inc. and Abbott Laboratories. The company was founded in 1995 and is headquartered in Watertown, Massachusetts.