2-[2-({1-[1-((S)-3-{2-[2-(2-Acetylamino-3-hydroxy-propanoylamino)-4-methyl-pentanoylamino]-3-carbamoyl-propanoylamino}-2-hydroxy-4-phenyl-butyl)-pyrrolidin-2-yl]-methanoyl}-amino)-3-methyl-pentanoylamino]-4-phenyl-butyric acid methyl ester AIDS-043113 AIDS043113 Ac-Ser-Leu-Asn-Phe[CHOHCH2]Pro-Ile-HPhe-OMe