InChI=1S/C21H30O9/c1-19(2)5-9-4-10(8-22)21(28)12(7-20(21,3)11(9)6-19)29-18-15(25)13(23)14(24)16(30-18)17(26)27/h4,8-9,11-16,18,23-25,28H,5-7H2,1-3H3,(H,26,27)