pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.26999998092651	QSARToolbox	0	-1	O=[N+]([O-])Nc1ccc(Br)cc1	O=[N+]([O-])[N-]c1ccc(Br)cc1	mol23927	O=[N+]([O-])Nc1ccc(Br)cc1