InChI=1S/C21H26N2O10/c1-7(2)21(4)20(31)22-16(23-21)9-5-8(3)11(6-10(9)17(27)28)32-19-14(26)12(24)13(25)15(33-19)18(29)30/h5-7,12-15,19,24-26H,1-4H3,(H,27,28)(H,29,30)(H,22,23,31)