pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.6	IUPAC digitized pKa	0	-1	CCCCC#CC(=O)O	CCCCC#CC(=O)[O-]	mol9985	CCCCC#CC(=O)O
2.61	Datawarrior	0	-1	CCCCC#CC(=O)O	CCCCC#CC(=O)[O-]	mol9985	CCCCC#CC(=O)O
2.6099999	OCHEM	0	-1	CCCCC#CC(=O)O	CCCCC#CC(=O)[O-]	mol9985	CCCCC#CC(=O)O
2.60999989509583	QSARToolbox	0	-1	CCCCC#CC(=O)O	CCCCC#CC(=O)[O-]	mol9985	CCCCC#CC(=O)O