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

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

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

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