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