((R)-1-{(S)-1-[(2R,3S)-3-(2-tert-Butylsulfamoyl-ethyl)-oxiranyl]-2-phenyl-ethylcarbamoyl}-2-methanesulfonyl-2-methyl-propyl)-carbamic acid benzyl ester AIDS-056932 AIDS056932 Cbz-(MeSO2Val)Phe Epoxy deriv.