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