InChI=1S/C23H30O9/c1-2-16(24)12-9-10-14-17(25)13-8-6-4-3-5-7-11-15-31-23-20(28)18(26)19(27)21(32-23)22(29)30/h8,13,18-21,23,26-28H,2-7,11,15H2,1H3,(H,29,30)/b13-8+