Benzoic acid (2R,4S)-4-({(2S,3R)-2-amino-3-(tert-butyl-dimethyl-silanyloxy)-3-[1-(1,1-dimethyl-allyl)-1H-indol-3-yl]-propionyl}-methyl-amino)-4-[(S)-1-((1S,2R)-2-methoxy-1-methoxycarbonyl-2-phenyl-ethylcarbamoyl)-ethylcarbamoyl]-2-methyl-butyl ester

(2S,3R)-2-Amino-3-methoxy-3-phenyl-propionic acid methyl ester