pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.96	Organic Oxygen Acids and Nitrogen Bases	0	-1	CC=C(C)C(=O)O	CC=C(C)C(=O)[O-]	mol21784	CC=C(C)C(=O)O
4.29	OCHEM	0	-1	CC=C(C)C(=O)O	CC=C(C)C(=O)[O-]	mol21784	CC=C(C)C(=O)O
4.30000019073486	QSARToolbox	0	-1	CC=C(C)C(=O)O	CC=C(C)C(=O)[O-]	mol21784	CC=C(C)C(=O)O
4.96000003814697	QSARToolbox	0	-1	CC=C(C)C(=O)O	CC=C(C)C(=O)[O-]	mol21784	CC=C(C)C(=O)O
4.28999996185303	QSARToolbox	0	-1	CC=C(C)C(=O)O	CC=C(C)C(=O)[O-]	mol21784	CC=C(C)C(=O)O