InChI=1S/C20H26O11/c1-20(2)12(31-20)7-9-5-8(6-10(21)17(25)26)3-4-11(9)29-19-15(24)13(22)14(23)16(30-19)18(27)28/h3-5,10,12-16,19,21-24H,6-7H2,1-2H3,(H,25,26)(H,27,28)