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