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