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