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