InChI=1S/C19H26O9/c1-9(2)13(20)12(8-10-4-6-11(26-3)7-5-10)27-19-16(23)14(21)15(22)17(28-19)18(24)25/h4-7,9,12,14-17,19,21-23H,8H2,1-3H3,(H,24,25)