InChI=1S/C16H19N5O2/c1-16(8-7-10-5-3-2-4-6-10)11(9-22)18-12-13(21-16)19-15(17)20-14(12)23/h2-6,22H,7-9H2,1H3,(H4,17,19,20,21,23)/t16-/m0/s1