(2S,5R)-5-(O-benzoyl-1-methyl-1-hydroxyethyl)-2-t-butyl-3-methyl-4-imidazolidinone

3,3-二甲基丙烯酸

苯基甲基3-甲基丁-2-烯酸酯

benzyl (2S)-2,3-dihydroxy-3-methylbutanoate

benzyl (4S)-5,5-dimethyl-1,3,2-dioxathiolane-4-carboxylate 2-oxide