pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.29	OCHEM	0	-1	C/C=C(/C)C(=O)O	C/C=C(/C)C(=O)[O-]	mol2256	C/C=C(/C)C(=O)O
4.3	Baltruschat ChEMBL	0	-1	C/C=C(/C)C(=O)O	C/C=C(/C)C(=O)[O-]	mol2256	C/C=C(/C)C(=O)O
4.245	AttenGpKa training set	0	-1	C/C=C(/C)C(=O)O	C/C=C(/C)C(=O)[O-]	mol2256	C/C=C(/C)C(=O)O