(S)-2-[(S)-2-((3S,4S)-4-{(S)-2-[(S)-2-Acetylamino-3-(1H-indol-3-yl)-propanoylamino]-3-methyl-butanoylamino}-3-hydroxy-6-methyl-heptanoylamino)-3-methyl-butanoylamino]-3-methyl-butyric acid benzyl ester AIDS-045155 AIDS045155 Ac-Trp-Val-Sta-Val-Val-OBz