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