4,4'-Bis(iodooxy)-2,2'-dimethyl-5,5'-bis(1-methylethyl-1,1'-biphenyl 5,5'-Diisopropyl-2,2'-dimethylbiphenyl-4,4'-diyl dihypoiodite 552-22-7 8048-66-6 Annidalin Aristol Bithymol