3-bromo-4-methyl-pyrrole-2,5-dicarboxylic acid diethyl ester

2-Ethoxycarbonyl-3-methyl-1H-pyrrol-1-propionsaeure-ethylester

氯甲酸乙酯

diethyl 5-bromo-3-methyl-1H-pyrrole-2,4-dicarboxylate