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