CN(C)c1nc(N)nc(N)n1    mol25753    0_1
CN(C)c1nc(N)[nH+]c(N)n1    mol25753    1_1
C[NH+](C)c1nc(N)nc(N)n1    mol25753    1_2
CN(C)c1nc(N)nc([NH3+])n1    mol25753    1_3
CN(C)c1nc(N)nc(N)[nH+]1    mol25753    1_4