chemical inhibits protein has role has role secondary carboxamide tertiary carboxamide EC 3.4.22.69 (SARS coronavirus main proteinase) inhibitor anticoronaviral agent PF-07321332 Nirmatrelvir CHEBI:170007 C23H32F3N5O4 0 499.535 (1R,2S,5S)-N-{(1S)-1-cyano-2-[(3S)-2-oxopyrrolidin-3-yl]ethyl}-6,6-dimethyl-3-[3-methyl-N-(trifluoroacetyl)-L-valyl]-3-azabicyclo[3.1.0]hexane-2-carboxamide chebi_ontology PF 07321332 InChI=1S/C23H32F3N5O4/c1-21(2,3)16(30-20(35)23(24,25)26)19(34)31-10-13-14(22(13,4)5)15(31)18(33)29-12(9-27)8-11-6-7-28-17(11)32/h11-16H,6-8,10H2,1-5H3,(H,28,32)(H,29,33)(H,30,35)/t11-,12-,13-,14-,15-,16+/m0/s1 An azabicyclohexane that is (1R,5S)-3-azabicyclo[3.1.0]hexane substituted by {(1S)-1-cyano-2-[(3S)-2-oxopyrrolidin-3-yl]ethyl}aminoacyl, 3-methyl-N-(trifluoroacetyl)-L-valinamide, methyl and methyl groups at positions 2S, 3, 6 and 6, respectively. It is an inhibitor of SARS-CoV-2 main protease which is currently under clinical development for the treatment of COVID-19. 499.24064 LIENCHBZNNMNKG-OJFNHCPVSA-N [H][C@]12CN([C@H](C(=O)N[C@@H](C[C@]3([H])CCNC3=O)C#N)[C@@]1([H])C2(C)C)C(=O)[C@@H](NC(=O)C(F)(F)F)C(C)(C)C PF07321332 azabicyclohexane nitrile organofluorine compound pyrrolidinecarboxamide pyrrolidin-2-ones 3C-like proteinase (SARS-CoV-2) 3C-like proteinase nsp5 (SARS-CoV-2)