ethyl 2-((S)-1-(2-((S)-1-(2-iodothiazole-4-carboxamido)-3-(methylamino)-3-oxopropyl)-5-methylthiazole-4-carboxamido)-2-methylpropyl)-5-(methoxymethyl)thiazole-4-carboxylate

(S)-2-(1-tert-butoxycarbonylamino-2-N-methylcarbamoyl)ethyl-5-methylthiazole-4-carboxylic acid

2-((S)-1-tert-butoxycarbonylamino-2-methyl-propyl)-thiazole-4-carboxylic acid ethyl ester

(S)-2-(1-amino-2-methylpropyl)thiazole-4-carboxylic acid ethyl ester

2-((S)-1-(2-((S)-1-(2-(2-bromo-6-(4-(tert-butoxycarbonyl)thiazol-2-yl)pyridin-3-yl)thiazole-4-carboxamido)-3-(methylamino)-3-oxopropyl)-5-methylthiazole-4-carboxamido)-2-methylpropyl)-5-(methoxymethyl)thiazole-4-carboxylic acid

ethyl (S)-2-(1-amino-2-methylpropyl)-5-(methoxymethyl)thiazole-4-carboxylate

(S)-5-methoxymethyl-2-[2-methyl-1-(tritylamino)propyl]-thiazole-4-carboxylic acid ethyl ester

ethyl 2-((S)-1-(2-((S)-1-(2-(2-bromo-6-(4-(tert-butoxycarbonyl)thiazol-2-yl)pyridin-3-yl)thiazole-4-carboxamido)-3-(methylamino)-3-oxopropyl)-5-methylthiazole-4-carboxamido)-2-methylpropyl)-5-(methoxymethyl)thiazole-4-carboxylate

methyl (S)-2-(1-tert-butoxycarbonylamino-2-carboxy)ethyl-5-methylthiazole-4-carboxylate

(S)-2-[2-methyl-1-(tritylamino)propyl]-thiazole-4-carboxylic acid ethyl ester

ethyl 2-((S)-1-(2-((S)-1-((tert-butoxycarbonyl)amino)-3-(methylamino)-3-oxopropyl)-5-methylthiazole-4-carboxamido)-2-methylpropyl)-5-(methoxymethyl)thiazole-4-carboxylate

(S)-2-(2-benzyloxycarbonyl-1-tert-butoxycarbonylaminoethyl)-5-methylthiazole-4-carboxylic acid methyl ester

ethyl 2-((S)-1-(2-((S)-1-(2-(2,6-dibromopyridin-3-yl)thiazole-4-carboxamido)-3-(methylamino)-3-oxopropyl)-5-methylthiazole-4-carboxamido)-2-methylpropyl)-5-(methoxymethyl)thiazole-4-carboxylate