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-carboxylic acid methyl 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

2-(2-{[2-((S)-1-tert-Butoxycarbonylamino-ethyl)-thiazole-4-carbonyl]-amino}-acryloylamino)-acrylic acid

(1'S)-2-(1-{[2-(1'-tert-butoxycarbonylamino-ethyl)-thiazole-4-carbonyl]-amino}-ethyl)-thiazole-4-carboxylic acid ethyl ester

(S)-benzyl tert-butyl propane-1,2-diyldicarbamate