1H-吡唑-3,5-二羧酸二甲酯

苯戊醇

4-hydroxy-4-phenyl-but-2-ynoic acid methyl ester

2-溴-2-丁烯酸甲酯

cis bromo-1 methoxymethyl-2 dicarbomethoxy-1,2 cyclopropane