ciluprevir
18-(4-bromobenzenesulfonyloxy)-14-cyclopentyloxycarbonylamino-2,15-dioxo-3,16-diaza-tricyclo-[14.3.0.0(4,6)]nonadec-7-ene-4-carboxylic acid methyl ester
(1S,2R)-1-{[(2S,4S)-4-(4-bromo-benzenesulfonyloxy)-1-((S)-2-cyclopentyloxycarbonylamino-oct-7-enoyl)pyrrolidine-2-carbonyl]-amino}-2-vinylcyclopropanecarboxylic acid methyl ester