1,2-Dimethyl-3-methoxycarbonyl-4-(2-nitro-4,5-dimethoxyphenyl)pyrrole 117648-83-6 1H-Pyrrole-3-carboxylic acid, 4-(4,5-dimethoxy-2-nitrophenyl)-1,2-dimethyl-, methyl ester Compound 87-305 Methyl 4-(4,5-dimethoxy-2-nitrophenyl)-1,2-dimethyl-1H-pyrrole-3-carboxylate