(E)-3-(5-ethoxycarbonyl-2,4-dimethyl-1H-pyrrol-3-yl)prop-2-enoic acid

3,5-二甲基-1H-吡咯-2-甲酸乙酯

ethyl 4-ethenyl-3,5-dimethyl-1H-pyrrole-2-carboxylate

乙醛

丙炔酸