(S)-2-tert-Butoxycarbonylamino-3-[1-(1,1-dimethyl-allyl)-1H-indol-3-yl]-propionic acid methyl ester

(S)-2-[[(S)-3-[1-(1,1-Dimethyl-allyl)-1H-indol-3-yl]-2-(9H-fluoren-9-ylmethoxycarbonylamino)-propionyl]-(3-methyl-but-2-enyl)-amino]-3-(1H-indol-3-yl)-propionic acid methyl ester

(S)-3-[1-(1,1-Dimethyl-allyl)-1H-indol-3-yl]-2-(9H-fluoren-9-ylmethoxycarbonylamino)-propionic acid