pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.61	IUPAC digitized pKa	0	-1	CCC#CC(=O)O	CCC#CC(=O)[O-]	mol9307	CCC#CC(=O)O
2.6	Datawarrior	0	-1	CCC#CC(=O)O	CCC#CC(=O)[O-]	mol9307	CCC#CC(=O)O
2.5999999	OCHEM	0	-1	CCC#CC(=O)O	CCC#CC(=O)[O-]	mol9307	CCC#CC(=O)O
2.59999990463257	QSARToolbox	0	-1	CCC#CC(=O)O	CCC#CC(=O)[O-]	mol9307	CCC#CC(=O)O