InChI=1S/C23H30O9/c1-2-3-4-5-6-7-8-11-16(24)12-9-10-13-17(25)14-15-31-23-20(28)18(26)19(27)21(32-23)22(29)30/h8,11,18-21,23,26-28H,2-7,14-15H2,1H3,(H,29,30)/b11-8+