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