pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
6.59999990463257	QSARToolbox	-1	-2	O=C(NCP(=O)([O-])O)c1ccccc1	O=C(NCP(=O)([O-])[O-])c1ccccc1	mol37164	O=C(NCP(=O)(O)O)c1ccccc1