Nc1cnc(N)nc1    mol4125    0_1
Nc1ncc([NH3+])cn1    mol4125    1_1
Nc1cnc(N)[nH+]c1    mol4125    1_2
Nc1cnc([NH3+])nc1    mol4125    1_3
[NH3+]c1cnc([NH3+])nc1    mol4125    2_1
Nc1cnc([NH3+])[nH+]c1    mol4125    2_2
Nc1ncc([NH3+])c[nH+]1    mol4125    2_3
Nc1c[nH+]c(N)[nH+]c1    mol4125    2_4