5,5'-diisopropyl-2,2'-dimethylbiphenyl-3,3',4,4'-tetrol InChI=1/C20H26O4/c1-9(2)13-7-15(11(5)17(21)19(13)23)16-8-14(10(3)4)20(24)18(22)12(16)6/h7-10,21-24H,1-6H [1,1'-biphenyl]-3,3',4,4'-tetrol, 2,2'-dimethyl-5,5'-bis(1-methylethyl)-