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