(R)-N-((S)-1-{(2R,3S)-3-[(1-Benzyl-2-methyl-propylcarbamoyl)-methyl]-oxiranyl}-2-phenyl-ethyl)-3-methanesulfonyl-3-methyl-2-(2-thiophen-3-yl-ethanoylamino)-butyramide 3-Thien-Ac(MeSO2-Val)Phe Epoxy deriv. AIDS-045220 AIDS045220