InChI=1S/C22H18O13/c1-31-17-8(24)5-10-11(12-16(32-10)7-3-2-6(23)4-9(7)33-21(12)30)18(17)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)