(S)-2-((2S,4R)-2-tert-Butoxycarbonylamino-4-methyl-octanoylamino)-propionic acid methyl ester

tert-butyl N-((2S,4R)-2-((R)-2-((((2S,4R)-2-((S)-2-((S)-2-((tert-butoxycarbonyl)amino)-N,4-dimethylpentanamido)-3-(1-methoxy-1H-indol-3-yl)propanamido)-4-methyloctanoyl)-L-alanyl)oxy)-4-cyanobutanamido)-4-methyloctanoyl)-N-methyl-L-leucinate