InChI=1S/C22H18O13/c1-31-9-4-6(23)5-10-12(9)18-11(21(30)32-10)7-2-3-8(24)17(16(7)33-18)34-22-15(27)13(25)14(26)19(35-22)20(28)29/h2-5,13-15,19,22-27H,1H3,(H,28,29)