(4R)-4-[N-(1-{N-[(1S)-2-((2S,4R)-2-{N-[(Diphenoxycarbonyl)butyl]carbamoyl}-4-(phenylmethoxy)pyrrolidinyl)-1-(methylethyl)-2-oxoethyl]carbamoyl}-2-methylbutyl)carbamoyl]-4-[(2S)-2-(acetylamino)-3-carboxypropanoylamino]butanoic acid AIDS-097717 AIDS097717 HCV NS3 protease inhibitor derived from substrate