InChI=1S/C19H26O9/c1-8(2)12(20)11-6-4-10(5-7-11)9(3)18(26)28-19-15(23)13(21)14(22)16(27-19)17(24)25/h4-9,12-16,19-23H,1-3H3,(H,24,25)