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