AIDS-045203 AIDS045203 EtOCO(MeSO2-Val)Phe Epoxy deriv. [(R)-1-((S)-1-{(2R,3S)-3-[(1-Benzyl-2-methyl-propylcarbamoyl)-methyl]-oxiranyl}-2-phenyl-ethylcarbamoyl)-2-methanesulfonyl-2-methyl-propyl]-carbamic acid ethyl ester