InChI=1/C15H18N4O2/c1-21-13-4-2-12(3-5-13)19-15(20)7-6-14(17-19)18-10-8-16-9-11-18/h2-7,16H,8-11H2,1H3/p+1/fC15H19N4O2/h16H/q+1 0C6C742C3E1FF3C6