3-[4-(2-carboxy-ethyl)-2-methyl-1H-pyrrole-3-sulfonyl]-benzoic acid ethyl ester 、
二甲胺 以to give 3-[4-(2-dimethylcarbamoyl-ethyl)-2-methyl-1H-pyrrole-3-sulfonyl]-benzoic acid ethyl ester的产率得到3-[4-(2-dimethylcarbamoyl-ethyl)-2-methyl-1H-pyrrole-3-sulfonyl]-benzoic acid ethyl ester