InChI=1S/C23H30O9/c1-3-5-6-7-12-17(14-13-16(25)11-9-8-10-15(24)4-2)31-23-20(28)18(26)19(27)21(32-23)22(29)30/h13-14,17-21,23,26-28H,3-7,12H2,1-2H3,(H,29,30)/b14-13+