(4-chlorophenoxy)methyl (S)-3-(3,4-diethoxycarbonyloxyphenyl)-2-hydrazino-2-methylpropanoate 、
(4-chlorophenoxy)methyl (S)-3-(3,4-dihydroxyphenyl)-2-hydrazino-2-methylpropanoate 、
4-pyridylmethyl (S)-3-(3,4-dihydroxyphenyl)-2-hydrazino-2-methylpropanoate 生成 4-Pyridylmethyl (s)-3-(3,4-diethylcarbonyloxyphenyl)-2-hydrazino-2-methylpropanoate