1197-13-3 1H-pyrrole-2-carboxylic acid, 5-formyl-, methyl ester InChI=1/C7H7NO3/c1-11-7(10)6-3-2-5(4-9)8-6/h2-4,8H,1H methyl 5-formyl-1H-pyrrole-2-carboxylate