InChI=1S/C25H26O8/c26-18(14-8-7-11-16-9-3-1-4-10-16)15-19(17-12-5-2-6-13-17)32-25-22(29)20(27)21(28)23(33-25)24(30)31/h1-14,19-23,25,27-29H,15H2,(H,30,31)/b11-7+,14-8?