英文别名
                        5-(4-ethyl-3-methyl-5-oxo-2,5-dihydro-pyrrol-2-ylmethyl)-3-(2-methoxycarbonyl-ethyl)-4-methyl-pyrrole-2-carboxylic acid tert-butyl ester;4-ethyl-4'-(2-methoxycarbonylethyl)-4,3'-dime-5-oxo-2,4-dihydro-2,2'-dipyrryl-methane-5'-carboxylic acid tert-butyl ester;tert-butyl 5-[(4-ethyl-3-methyl-5-oxo-1,2-dihydropyrrol-2-yl)methyl]-3-(3-methoxy-3-oxopropyl)-4-methyl-1H-pyrrole-2-carboxylate