InChI=1S/C18H30O9/c1-2-3-5-8-11(9-6-4-7-10-12(19)20)26-18-15(23)13(21)14(22)16(27-18)17(24)25/h6,9,11,13-16,18,21-23H,2-5,7-8,10H2,1H3,(H,19,20)(H,24,25)/b9-6-