(1,1'-Biphenyl)-2,2'-diyl oxide 132-64-9 2,2'-Biphenylene oxide 2,2'-Biphenylylene oxide 214827-48-2 AI3-00039 CCRIS 1436 DIBENZOFURAN Dibenzo(b,d)furan Dibenzofurans Dibenzol(b,d)furan Diphenylene oxide EINECS 205-071-3 HSDB 2163 NSC 1245