(R)-N-((S)-1-{(2R,3S)-3-[(1-Benzyl-2-methyl-propylcarbamoyl)-methyl]-oxiranyl}-2-phenyl-ethyl)-2-(3-cyclopropyl-3-methyl-ureido)-3-methanesulfonyl-3-methyl-butyramide AIDS-045208 AIDS045208 c-PrNCON(MeSO2-Val)Phe Epoxy deriv.