(4R)-4-{N-[1-(N-{(1S)-2-[2-(N-{(1S)-2-Oxo-2-[N-benzylcarbamoyl]-1-propylethyl}carbamoyl)(2S,4R)-4-(phenylmethoxy)pyrrolidinyl]-1-(methylethyl)-2-oxoethyl}carbamoyl)-2-methylbutyl]carbamoyl}-4-[(2S)-2-(acetylamino)-3-carboxypropanoylamino]butanoic acid AIDS-097718 AIDS097718 HCV NS3 protease inhibitor derived from substrate