英文别名
3,4-Dicarbomethoxy-6,7,8,9-tetraphenyl-1,2-diazaspiro<4,4>nonatetraen;6,7,8,9-tetraphenyl-1,2-diaza-spiro[4.4]nona-1,3,6,8-tetraene-3,4-dicarboxylic acid dimethyl ester;Dimethyl 6,7,8,9-tetraphenyl-1,2-diazaspiro[4.4]nona-1,3,6,8-tetraene-3,4-dicarboxylate