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