InChI=1S/C21H26O11/c1-21(2,8-30-20-15(25)13(23)14(24)17(32-20)19(27)28)18(26)12-10(29-3)6-4-9-5-7-11(22)31-16(9)12/h4-7,13-15,17-18,20,23-26H,8H2,1-3H3,(H,27,28)