pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.66	IUPAC digitized pKa	0	-1	CC(C)(C)C#CC(=O)O	CC(C)(C)C#CC(=O)[O-]	mol9987	CC(C)(C)C#CC(=O)O
2.6600001	OCHEM	0	-1	CC(C)(C)C#CC(=O)O	CC(C)(C)C#CC(=O)[O-]	mol9987	CC(C)(C)C#CC(=O)O
2.66000008583069	QSARToolbox	0	-1	CC(C)(C)C#CC(=O)O	CC(C)(C)C#CC(=O)[O-]	mol9987	CC(C)(C)C#CC(=O)O