1H-Pyrrole-2-acetic acid, 3-carboxy-1,4-dimethyl-, 2-methyl ester
1H-Pyrrole-2-acetic acid, 3-carboxy-1,4-dimethyl-, α-methyl ester
2-Methyl 3-carboxy-1,4-dimethyl-1H-pyrrole-2-acetate
2-(2-Methoxy-2-oxoethyl)-1,4-dimethyl-1H-pyrrole-3-carboxylic acid