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Ethyl 3,5-dimethyl-1H-pyrrole-2-carboxylate Methyl 2-pyrrolecarboxylate 4-(2-CARBOXYETHYL)-3,5-DIMETHYLPYRROLE-2-CARBOXYLIC ACID, ETHYL ETHER 3,4-DIMETHYL-1H-PYRROLE-2-CARBOXYLIC ACID ETHYL ESTER METHYL 5-(BENZYLOXYCARBONYL)-2,4-DIMETHYL-3-PYRROLEPROPIONATE ethyl 4-(2-methoxycarbonylethyl)-3,5-dimethyl-1H-pyrrole-2-carboxylate TERT-BUTYL 3,4,5-TRIMETHYL-2-PYRROLECARBOXYLATE