InChI=1S/C23H30O9/c1-3-4-5-6-7-8-9-12-16(24)13-10-11-14-17(25)15(2)31-23-20(28)18(26)19(27)21(32-23)22(29)30/h9,12,15,18-21,23,26-28H,3-8H2,1-2H3,(H,29,30)/b12-9+