甲醛

3,5-二甲基-1H-吡咯-2-甲酸乙酯

4-acetoxymethyl-3,5-dimethyl-pyrrole-2-carboxylic acid ethyl ester

3,5-dimethyl-4-piperidinomethyl-pyrrole-2-carboxylic acid ethyl ester

4-甲酰基-3,5-二甲基-1H-吡咯-2-羧酸乙酯