5,8-dihydroxy-6-methyl-2,3-dihydronaphthalene-1,4-dione

4-氯-2,5-二甲氧基-苯甲醛

2,5-二乙氧基甲苯

4,4'-二甲基-1,1'-联苯-2,2',5,5'-四酮

2,5-二甲氧基-4-甲苯甲醛