InChI=1S/C19H30O8/c1-5-6-11(12-9(2)10(20)7-8-19(12,3)4)26-18-15(23)13(21)14(22)16(27-18)17(24)25/h5-6,9,11-16,18,21-23H,7-8H2,1-4H3,(H,24,25)/b6-5-