(S)-2-[(S)-2-(2-{(2S,3S)-3-[(S)-2-((S)-2-Amino-propanoylamino)-propanoylamino]-2-hydroxy-4-phenyl-butylamino}-ethanoylamino)-3-methyl-butanoylamino]-3-methyl-butyric acid, methyl ester AIDS-000856 AIDS000856 Ala-Ala-Phe[CHOHCH2]Gly-Val-Val-OMe