pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.67	IUPAC digitized pKa	0	-1	CC=CC#CC(=O)O	CC=CC#CC(=O)[O-]	mol9537	CC=CC#CC(=O)O
2.6700001	OCHEM	0	-1	CC=CC#CC(=O)O	CC=CC#CC(=O)[O-]	mol9537	CC=CC#CC(=O)O