InChI=1S/C23H32O9/c1-2-3-4-5-6-7-8-11-15(24)12-9-10-13-16(17-14-30-17)31-23-20(27)18(25)19(26)21(32-23)22(28)29/h8,11,15-21,23-27H,2-7,14H2,1H3,(H,28,29)/b11-8-