pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.03000020980835	QSARToolbox	0	-1	C=C(CCC(=O)O)C(=O)O	C=C(CCC(=O)O)C(=O)[O-],C=C(CCC(=O)[O-])C(=O)O	mol33857	C=C(CCC(=O)O)C(=O)O