InChI=1S/C16H19N3O5/c1-7(2)16(4)14(22)17-12(19-16)9-5-8(3)11(20)6-10(9)13(21)18-15(23)24/h5-7,20H,1-4H3,(H,18,21)(H,23,24)(H,17,19,22)