(3S,4S)-3-{(R)-2-[(S)-2-((S)-2-Benzyloxycarbonylamino-3-phenyl-propionylamino)-propionylamino]-4-methyl-pentanoyloxy}-4-methyl-octanoic acid 4-nitro-benzyl ester

(3S,4S)-4-nitrobenzyl 3-((S)-2-(tert-butoxycarbonylamino)-3-phenylpropanoyloxy)-4-methyl octanoate