File:Xray crystal structure PDB-7si9.alt=Xray crystal structure PDB:X-ray crystal structure ( PDB:7SI9 and 7VH8) of the SARS-CoV-2 protease inhibitor<unk>  bound to the viral 3CLpro protease enzyme. Ribbon diagram of the protein with the drug shown as sticks. The catalytic residues (His41, Cys145) are shown as yellow sticks.<unk>  is an antiviral medication developed by Pfizer which acts as an orally active 3C-like protease inhibitor. It is part of the<unk> /ritonavir combination used to treat COVID-19 and sold under the brand name Paxlovid.
Nirmatrelvir
Odalasvir
Fostemsavir
Maribavir
Elbasvir
Ombitasvir
Coronavir
Saquinavir