pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
3.98	Datawarrior	0	-1	CNC(=O)/C=C\C(=O)O	CNC(=O)/C=C\C(=O)[O-]	mol13521	CNC(=O)/C=C\C(=O)O
4.0	QSARToolbox	0	-1	CNC(=O)/C=C\C(=O)O	CNC(=O)/C=C\C(=O)[O-]	mol13521	CNC(=O)/C=C\C(=O)O