InChI=1S/C22H22O10/c1-10-13(24)9-14(31-22-19(28)17(26)18(27)20(32-22)21(29)30)15(16(10)25)12(23)8-7-11-5-3-2-4-6-11/h2-9,17-20,22,24-28H,1H3,(H,29,30)/b8-7+