pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
5.18	IUPAC digitized pKa	0	-1	NC(=O)C[N+](=O)[O-]	NC(=O)[CH-][N+](=O)[O-]	mol8946	NC(=O)C[N+](=O)[O-]
5.15	IUPAC digitized pKa	0	-1	NC(=O)C[N+](=O)[O-]	NC(=O)[CH-][N+](=O)[O-]	mol8946	NC(=O)C[N+](=O)[O-]
5.17999982833862	QSARToolbox	0	-1	NC(=O)C[N+](=O)[O-]	NC(=O)[CH-][N+](=O)[O-]	mol8946	NC(=O)C[N+](=O)[O-]