methyl (S)-2''-(1-((tert-butoxycarbonyl)amino)-2-methylpropyl)-[2,4':2',4''-teroxazole]-4-carboxylate

2-((S)-2-tert-Butoxycarbonylamino-3-methyl-butyrylamino)-3-hydroxy-propionic acid methyl ester

(S)-2-(1-((tert-butoxycarbonyl)amino)-2-methylpropyl)oxazole-4-carboxylic acid methyl ester

4-<2-<(S)-1-tert-butyloxycarbonylamino-2-methylpropyl>>-oxazole carboxylic acid