(R)-3-Methanesulfonyl-3-methyl-N-((S)-1-{(2R,3S)-3-[((R)-2-methyl-1-phenyl-propylcarbamoyl)-methyl]-oxiranyl}-2-phenyl-ethyl)-2-(2-pyrrolidin-1-yl-ethanoylamino)-butyramide AIDS-045191 AIDS045191 Pyrrol-MeCO(MeSO2Val)Phe Epoxy deriv.