benzyl 4-ethynyl-3,5-dimethylpyrrole-2-carboxylate

benzyl 4-(1-chlorovinyl)-3,5-dimethylpyrrole-2-carboxylate

benzyl 4-(bromoacetyl)-3,5-dimethylpyrrole-2-carboxylate

5-(苄氧羰基)-2,4-二甲基-3-吡咯丙酸甲酯

benzyl-5-(acetoxymethyl)-4-[2-(methoxycarbonyl)ethyl]-3-methylpyrrole-2--carboxylate