InChI=1S/C25H26O9/c1-13(2)3-7-16-9-14(4-5-15-10-17(26)12-18(27)11-15)6-8-19(16)33-25-22(30)20(28)21(29)23(34-25)24(31)32/h3-12,20-23,25-30H,1H2,2H3,(H,31,32)/b5-4+,7-3+