InChI=1S/C20H18O14/c1-2-6-10(11(17(26)27)18(28)29)12(22)9-7(32-6)3-5(21)4-8(9)33-20-15(25)13(23)14(24)16(34-20)19(30)31/h2-4,11,13-16,20-21,23-25H,1H2,(H,26,27)(H,28,29)(H,30,31)