InChI=1S/C24H26O9/c1-3-15(12-5-8-14(25)9-6-12)16(4-2)13-7-10-18(17(26)11-13)32-24-21(29)19(27)20(28)22(33-24)23(30)31/h3-11,19-22,24-29H,1-2H3,(H,30,31)/b15-3?,16-4+