InChI=1S/C22H18O13/c1-31-6-2-8(23)12-10(4-6)33-18-13-9(24)3-7(5-11(13)34-21(30)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)