InChI=1S/C20H26O11/c1-7(17(25)26)8-4-5-10(21)9(6-11-20(2,3)31-11)15(8)29-19-14(24)12(22)13(23)16(30-19)18(27)28/h4-5,7,11-14,16,19,21-24H,6H2,1-3H3,(H,25,26)(H,27,28)