InChI=1S/C18H19N5O2/c1-11(17(24)20-16-10-15(21-22-16)13-2-3-13)12-4-6-14(7-5-12)23-9-8-19-18(23)25/h4-7,10-11,13H,2-3,8-9H2,1H3,(H,19,25)/b20-16+/t11-/m0/s1