胡椒醛 、
6-溴-3,4-亚甲基二氧苯甲醛 、 Ethyl-2-bromo-4,5-methylenedioxyphenylpropiolate 、 以The corresponding 2-bromo-4, 5-methylenedioxyphenylpropiolic acid (4) was obtained by alkaline hydrolysis of the ester (crude)的产率得到2-Brom-4,5-methylendioxy-phenylpropiolsaeure