1-Ethyl-2,3-dicarbomethoxy-7-oxabicyclo(2.2.1)hepta-2,5-diene

6-methyl-1,2,3,4-tetraphenylnaphthalene

3,4,5,6-tetraphenylphthalic acid

1,2-二氢-3,4,5,6-四苯基邻苯二甲酸酐