(1,1'-Biphenyl)-4,4'-diol, 3,3'-dimethyl- (m,m'-Bitolyl)-4,4'-diol 154499-65-7 3,3'-Dimethyl-4,4'-biphenol 3,3'-Dimethyl-4,4'-biphenyldiol 4,4'-Bi-o-cresol 4,4'-Dihydroxy-3,3'-dimethylbiphenyl 52645-04-2 612-84-0 NSC 4187