InChI=1S/C24H26O9/c1-3-17(24(12(2)33-24)14-6-8-15(25)9-7-14)13-4-10-16(11-5-13)31-23-20(28)18(26)19(27)21(32-23)22(29)30/h3-12,18-21,23,25-28H,1-2H3,(H,29,30)/b17-3+