InChI=1S/C21H30O9/c1-9-5-6-10-20(2,3)11(22)7-8-21(10,4)12(9)18(28)30-19-15(25)13(23)14(24)16(29-19)17(26)27/h5,10,12-16,19,23-25H,6-8H2,1-4H3,(H,26,27)