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