InChI=1S/C22H38O9/c1-2-3-4-5-6-7-8-9-10-11-12-15(23)13-14-16(24)30-22-19(27)17(25)18(26)20(31-22)21(28)29/h13-15,17-20,22-23,25-27H,2-12H2,1H3,(H,28,29)/b14-13+