InChI=1S/C19H30O8/c1-4-5-6-11-10(12(20)7-8-19(11,2)3)9-26-18-15(23)13(21)14(22)16(27-18)17(24)25/h4-5,10-11,13-16,18,21-23H,6-9H2,1-3H3,(H,24,25)/b5-4-