InChI=1S/C23H30O9/c1-14(2)7-6-8-15(11-12-30-22(29)16-9-4-3-5-10-16)13-31-23-19(26)17(24)18(25)20(32-23)21(27)28/h3-5,7,9-11,17-20,23-26H,6,8,12-13H2,1-2H3,(H,27,28)/b15-11+