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