InChI=1S/C21H28N2O11/c1-7(2)21(4,20(31)32)23-16(22)9-5-8(3)11(6-10(9)17(27)28)33-19-14(26)12(24)13(25)15(34-19)18(29)30/h5-7,12-15,19,24-26H,1-4H3,(H2,22,23)(H,27,28)(H,29,30)(H,31,32)