InChI=1S/C21H28O11/c1-20(2)17(31-20)12(23)8-21(3,6-4-11(22)10-5-7-29-9-10)32-19-15(26)13(24)14(25)16(30-19)18(27)28/h5,7,9,13-17,19,24-26H,4,6,8H2,1-3H3,(H,27,28)