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