1,2-dibromo-4,5-dipentoxybenzene

7,8-dibromo-3,4-dihydro-2H-1,5-benzodioxepine

4,5-双(苯基甲氧基)-1,2-苯二甲腈

1,2-dibromo-4,5-dihexoxybenzene

4,5-dibutoxybenzene-1,2-dicarbonitrile