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