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