InChI=1S/C21H30O9/c1-9-5-4-6-11-16(21(8-20(9,11)3)10(2)7-28-19(21)27)30-18-14(24)12(22)13(23)15(29-18)17(25)26/h9,11-16,18,22-24H,2,4-8H2,1,3H3,(H,25,26)