InChI=1S/C19H28O8/c1-10-11(19(2,3)8-7-12(10)20)6-4-5-9-26-18-15(23)13(21)14(22)16(27-18)17(24)25/h4-5,13-16,18,21-23H,6-9H2,1-3H3,(H,24,25)/b5-4-