(S)-2-[(2S,3S)-2-((S)-2-{(1S,4S)-4-[(S)-2-((S)-2-Acetylamino-4-methyl-pentanoylamino)-3-methyl-butanoylamino]-1-hydroxy-3-oxo-5-phenyl-pentylamino}-3-phenyl-propanoylamino)-3-methyl-pentanoylamino]-3-methyl-butyramide AIDS-057828 AIDS057828 Ac-Leu-Val-Phe-{CH2-(S)-CHOH}-Phe-Ile-Val-NH2