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