3-[4-(3-oxo-2,4,5-triphenylcyclopenta-1,4-dien-1-yl)phenyl]-2,4,5-triphenylcyclopenta-2,4-dien-1-one

对苯二甲醛

苯甲醛

对苯二甲酸二甲酯

4-碘苯甲醛