Nc1ncc(Cl)nc1C=O    mol6772    0_1
Nc1ncc(Cl)[nH+]c1C=O    mol6772    1_1
Nc1[nH+]cc(Cl)nc1C=O    mol6772    1_2
[NH3+]c1ncc(Cl)nc1C=O    mol6772    1_3