2,6-dichloro-4-[(3,5-dichloro-4-hydroxyphenyl)hydrazinylidene]cyclohexa-2,5-dien-1-one

2-chloro-4,4'-azo-di-phenol

2,2'-dichloro-4,4'-azo-di-phenol

2,6,2'-trichloro-4,4'-azo-di-phenol

4,4’-二羟基偶氮苯