InChI=1S/C18H30O9/c1-2-3-4-5-6-7-8-11(9-10-12(19)20)26-18-15(23)13(21)14(22)16(27-18)17(24)25/h7-8,11,13-16,18,21-23H,2-6,9-10H2,1H3,(H,19,20)(H,24,25)/b8-7-