2',7'-dibromo-2,3,6,7-tetraoctoxy-9,9'-spirobi[fluorene]

2,3-Dihydroimidazo<1,2-a>benzimidazol

3-methyl-2,4-dihydro-1,5-benzodioxepin-3-ol

2,3-dihydro-2-methyl-1,4-benzodioxin-2-methyl 4-tolylsulfonate

2-己基-2-甲基-1,3-苯并二氧戊环