2-[(S)-1-({2-[((S)-2-Amino-3-methyl-butyrylamino)-methyl]-5-methyl-oxazole-4-carbonyl}-amino)-ethyl]-thiazole-4-carboxylic acid ethyl ester

2-((S)-1-{[2-({(S)-2-[(2-{6-Benzyloxymethyl-2-[2-((S)-1-tert-butoxycarbonylamino-ethyl)-5-methyl-oxazol-4-yl]-pyridin-3-yl}-thiazole-4-carbonyl)-amino]-3-methyl-butyrylamino}-methyl)-5-methyl-oxazole-4-carbonyl]-amino}-ethyl)-thiazole-4-carboxylic acid