4-氯苯甲醛二乙基乙缩醛

1,4-bis(4-chlorophenyl)-1,4-dimethoxybutane

dl-1,2-bis(p-chlorophenyl)ethane-1,2-diol

1,2-双(4-氯苯基)-2-羟基乙酮

4,4'-二氯苯偶酰