N=C(N)Nc1nc(N)nc(N)n1    mol4272    0_1
N=C(N)Nc1nc(N)nc([NH3+])n1    mol4272    1_1
N=C(N)Nc1nc(N)nc(N)[nH+]1    mol4272    1_2
N=C(N)Nc1nc(N)[nH+]c(N)n1    mol4272    1_3
NC(=[NH2+])Nc1nc(N)nc(N)n1    mol4272    1_4