6-chloro-3-(4'-chloro-2'-nitrophenyl)-2,1-benzisoxazole

3,6-dichloro-N-hydroxyacridone

3,6-dichloro-10H-acridin-9-one

3,8-dichlorodibenzo<1,2>diazepin-11-one-5-oxide

4,4'-dichloro-2,2'-dinitro-benzophenone