Nc1ncc([N+](=O)[O-])c(N)n1    mol7310    0_1
Nc1ncc([N+](=O)[O-])c([NH3+])n1    mol7310    1_1
Nc1nc([NH3+])ncc1[N+](=O)[O-]    mol7310    1_2
Nc1ncc([N+](=O)[O-])c(N)[nH+]1    mol7310    1_3
Nc1nc(N)c([N+](=O)[O-])c[nH+]1    mol7310    1_4