InChI=1S/C22H20O12/c1-31-10-3-8(2-9(23)4-10)14-7-13(25)16-12(24)5-11(6-15(16)33-14)32-22-19(28)17(26)18(27)20(34-22)21(29)30/h2-7,17-20,22-24,26-28H,1H3,(H,29,30)