pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
1.95000004768372	QSARToolbox	0	-1	O=C(O)C(=O)C(=O)C(=O)O	O=C([O-])C(=O)C(=O)C(=O)O	mol33956	O=C(O)C(=O)C(=O)C(=O)O