InChI=1/C15H18N4O2/c1-20-12-5-11(6-13(7-12)21-2)18-15-17-9-10-8-16-4-3-14(10)19-15/h5-7,9,16H,3-4,8H2,1-2H3,(H,17,18,19)/p+1/fC15H19N4O2/h16,18H/q+1 672817A7E7C4268C