3-(2-ethoxycarbonyl-ethyl)-4-ethoxycarbonylmethyl-pyrrole-2,5-dicarboxylic acid-5-ethyl ester

ethyl 3-(2-ethoxycarbonylethyl)-4-ethoxycarbonylmethyl-2-methylpyrrole-5-carboxylate

1H-Pyrrole-2,5-dicarboxylic acid, 3-(2-carboxyethyl)-4-methyl-

5,5'-dicarboxy-3,3'-bis-(2-carboxyethyl)-4,4'-dimethyldipyrrylmethane

醋酸