Narlaprevir
Narlaprevir is an azabicyclohexane that is (1R,5S)-6,6-dimethyl-3-azabicyclo[3.1.0]hexane substituted by [(3S)-1-(cyclopropylamino)-1,2-dioxoheptan-3-yl]aminoacyl and N-({1-[(tert-butylsulfonyl)methyl]cyclohexyl}carbamoyl)-3-methyl-L-valyl groups at positions 2S and 3, respectively. It is a hepatitis C virus (HCV) NS3/4A serine protease inhibitor (Ki = 6 nM) that is used for the treatment of chronic hepatitis C. It has a role as a hepatitis C protease inhibitor, an antiviral drug, an EC 3.4.22.69 (SARS coronavirus main proteinase) inhibitor and an anticoronaviral agent. It is a sulfone, a member of ureas, a tertiary carboxamide, an azabicyclohexane, a pyrrolidinecarboxamide, a secondary carboxamide and a member of cyclopropanes.