(3S)-3-[[(1S)-1-carbamoyl-2-(1H-indol-3-yl)ethyl]carbamoyl]-3-[[(2S)-1 -[(2S)-2-[[(2S)-2-[[(2S)-3-carbamoyl-2-[[(2S)-4-methyl-2-[[(2S)-5-oxop yrrolidine-2-carbonyl]amino]pentanoyl]amino]propanoyl]amino]-3-(4-hydr oxyphenyl)propanoyl]amino]-3-hydroxy-propanoyl]pyrrolidine-2-carbonyl] amino]propanoic acid