英文别名
                        3,3'-Diethoxycarbonyl-4,4'-dimethyl-5,5'-dichlor-2,2'-dipyrryl-methen;5,5'-dichloro-4,4'-dimethyl-1H,2'H-2,2'-methanylylidene-bis-pyrrole-3-carboxylic acid diethyl ester;ethyl 5-chloro-2-[(5-chloro-3-ethoxycarbonyl-4-methyl-1H-pyrrol-2-yl)methylidene]-4-methylpyrrole-3-carboxylate