InChI=1S/C25H26O8/c1-14(2)5-11-18-19(31-3)12-8-16(21(18)27)13-25(24(30)32-4)20(22(28)23(29)33-25)15-6-9-17(26)10-7-15/h5-10,12,26-28H,11,13H2,1-4H3/t25-/m1/s1