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