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