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