benzyl [(1S)-1-{[2-({2-[(1S)-1-{[(benzyloxy)carbonyl]amino}-3-methylbutyl]-1,3-thiazol-4-yl}carbonyl)hydrazino]carbonyl}-3-methylbutyl]carbamate
benzyl [(1s)-1-{[2-({2-[(1s)-1-{[(benzyloxy)carbonyl]amino}-3-methylbutyl]-1,3-thiazol-4-yl}carbonyl)hydrazino]carbonyl}-3-methylbutyl]carbamate