InChI=1S/C20H26O11/c1-8-3-10(21)7-11(29-8)4-9-5-12(28-2)14(22)13(6-9)30-20-17(25)15(23)16(24)18(31-20)19(26)27/h5-6,8,11,15-18,20,22-25H,3-4,7H2,1-2H3,(H,26,27)