5-Phenylazobenzene-2-ol

2-Hydroxy-5-phenylazobenzene

4-Hydroxy-3-(phenylazo)biphenyl

3-(Phenylazo)-1,1'-biphenyl-4-ol

(1,1'-Biphenyl)-4-ol, 3-(phenylazo)-

(1,1'-Biphenyl)-4-ol, 3-(2-phenyldiazenyl)-