(S)-2-[(S)-2-({1-[(S)-1-((S)-3-(3,5-Difluorophenyl)-2-{(S)-2-[(S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-propanoylamino]-propanoylamino}-propanoyl)-pyrrolidin-2-yl]-methanoyl}-amino)-3-methyl-butanoylamino]-3-methyl-butyric acid methyl ester AIDS-082181 AIDS082181 Fmoc-Ala-Ala-Phe(F,F)m,m-Pro-OMe.B