1,2-Benzenediol, 4-phenyl- 3,4-Biphenyldiol 3,4-Dihydroxybiphenyl 4-Phenyl-1,2-benzenediol 4-Phenylcatechol 4-Phenylpyrocatechol 92-05-7 NSC1267 [1,1'-Biphenyl]-3,4-diol