pyrrole-1,2,5-tricarboxylic acid 1-tert-butyl ester 2,5-dimethyl ester

pyrrole-2,5-dicarboxylic acid monomethyl ester

2-吡咯甲醛

3,4-Dichloro-1H-pyrrole-2,5-dicarboxylic acid

(5-carboxy-pyrrol-2-yl)-glyoxylic acid