5448-16-8
3-甲基-1H-吡咯-2,4-二羧酸二乙酯
→
5462-34-0
diethyl 5-iodo-3-methyl-1H-pyrrole-2,4-dicarboxylate
37789-75-6
4-甲基-3,5-二乙氧羰基-2-吡咯甲酸