Cc1ncc([N+](=O)[O-])c(N)n1    mol7103    0_1
Cc1ncc([N+](=O)[O-])c(N)[nH+]1    mol7103    1_1
Cc1nc(N)c([N+](=O)[O-])c[nH+]1    mol7103    1_2
Cc1ncc([N+](=O)[O-])c([NH3+])n1    mol7103    1_3