ethyl 2-ethoxycarbonyl-5-(diethylaminomethyl)-3-methylpyrrole-4-propionate

4-ethyl-3,5-dimethyl-1H-pyrrole-2-carboxylic acid

3-(2,4-二甲基-5-羧基-1H-3-吡咯)丙酸

(5-carboxy-2,4-dimethyl-pyrrol-3-yl)-succinic acid

甲酸