Nc1cnc2ncnc(N)c2n1    mol4754    0_1
Nc1cnc2ncnc(N)c2[nH+]1    mol4754    1_1
Nc1cnc2nc[nH+]c(N)c2n1    mol4754    1_2
Nc1cnc2[nH+]cnc(N)c2n1    mol4754    1_3
Nc1ncnc2ncc([NH3+])nc12    mol4754    1_4
Nc1cnc2ncnc([NH3+])c2n1    mol4754    1_5
Nc1c[nH+]c2ncnc(N)c2n1    mol4754    1_6