(4R)-4-methyl-2-phenyl-4,5-dihydrothiazole-4-carboxylic acid

N-Boc-methylcysteine methyl ester

methyl (R)-2-((tert-butoxycarbonyl)amino)-2-methyl-3-(((S)-4-methyl-2-phenyl-4,5-dihydrothiazole-4-carbonyl)thio)propanoate