Catalyst Biosciences, Inc., a clinical-stage biopharmaceutical company, focuses on development and commercialization of liver fibrosis associated with a broad spectrum of chronic liver diseases in the United States and internationally. It develops Hydronidone, that has completed phase 1 clinical trial for the treatment of nonalcoholic steatohepatitis, a severe form of nonalcoholic fatty liver disease. The company was founded in 2002 and is headquartered in South San Francisco, California.