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