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