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