(R)-2-Acetylamino-3-methanesulfonyl-3-methyl-N-((S)-1-{(2R,3S)-3-[((R)-2-methyl-1-phenyl-propylcarbamoyl)-methyl]-oxiranyl}-2-phenyl-ethyl)-butyramide AIDS-045194 AIDS045194 Ac(MeSO2Val)Phe Epoxy deriv.