pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.04	IUPAC digitized pKa	0	-1	CC1=CC(=O)C=C(O)C1=O	CC1=CC(=O)C=C([O-])C1=O	mol9953	CC1=CC(=O)C=C(O)C1=O
4.86	AttenGpKa training set	0	-1	CC1=CC(=O)C=C(O)C1=O	CC1=CC(=O)C=C([O-])C1=O	mol9953	CC1=CC(=O)C=C(O)C1=O