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