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3-(2-ETHOXYCARBONYL-ET)-5-METHYL-1H-PYRROLE-2,4-DICARBOXYLIC ACID 2-BENZYL ESTER 3-(2-ETHOXYCARBONYL-ET)-5-METHYL-1H-PYRROLE-2,4-DICARBOXYLIC ACID 2-BENZYL ESTER