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

(S)-1-(1-tert-butoxycarbonylamino-2-methylpropylthiazol-4-yl)-3-carbomethoxy-1-ethoxy-2-aza-1,3-butadiene

2-((S)-1-{[2-((S)-1-{[(4S,5R)-2-((S)-1-Amino-2-methyl-propyl)-5-methyl-4,5-dihydro-oxazole-4-carbonyl]-amino}-2-methyl-propyl)-oxazole-4-carbonyl]-amino}-2-methyl-propyl)-thiazole-4-carboxylic acid ethyl ester

2-((S)-1-Amino-2-methyl-propyl)-thiazole-4-carboxylic acid tert-butyl ester

allyl (S)-2-(1-amino-2-methylpropyl)thiazole-4-carboxylate