(1,1'-Biphenyl)-2,2'-diol 1806-29-7 2,2'-BIPHENOL 2,2'-Dihydroxybiphenyl 2,2'-Dihydroxydiphenyl 4-06-00-06645 (Beilstein Handbook Reference) BRN 1638363 Biphenyl-2,2'-diol CCRIS 2980 EINECS 217-303-0 NSC 37068 O,O'-Biphenol o,o'-Dihydroxybiphenyl o,o'-Diphenol o-Dihydroxydiphenyl