Ascletis Pharma Inc., a biotechnology company, engages in the research and development, manufacture, marketing, and sale of pharmaceutical products in Mainland China and internationally. The company offers Ritonavir oral tablet, a pharmacokinetic booster of various oral antiviral drugs targeting viral proteases and a component of the approved oral antiviral drug Paxlovid; ASCLEVIR and GANOVO for the treatment of Hepatitis C virus. It is also developing ASC22 for treating chronic hepatitis B (CHB) and human immunodeficiency virus functional cure; ASC42 for chronic hepatitis B functional cure; ASC10 and ASC11 to treat COVID-19; ASC40, ASC41, ASC42, ASC43F FDC, ASC44F FDC, and ASC45F FDC for non-alcoholic steatohepatitis; and ASC42 for the treatment of primary biliary cholangitis. In addition, the company is developing ASC40 to treat recurrent glioblastoma, drug resistant breast cancer, and KRAS mutant non-small cell lung cancer; ASC61 and ASC63 for advanced solid tumors; ASC60 to treat solid tumors; and ASC40 for the treatment of acne, Ascletis Pharma Inc. was founded in 2013 and is headquartered in Hangzhou, the People's Republic of China.