InChI=1S/C19H26O9/c1-9(8-20)7-11-3-5-12(6-4-11)10(2)18(26)28-19-15(23)13(21)14(22)16(27-19)17(24)25/h3-6,9-10,13-16,19-23H,7-8H2,1-2H3,(H,24,25)