1-methyl-2,3-bis(methyl-4-tolylamino)-9-phenyl-1,9-dihydroimidazo[1,2-a]pyridine-5,6,7,8-tetracarboxylic acid-tetramethyl ester

丁炔二酸二甲酯

1-methyl-2-phenyl-4,5-bis(methyl-4-tolylamino)-1H-imidazole

对甲基苯甲醛

4-氯苯甲醛