pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.0	IUPAC digitized pKa	0	-1	O=C1C=C(O)C(=O)c2ccccc21	O=C1C=C([O-])C(=O)c2ccccc21	mol11172	O=C1C=C(O)C(=O)c2ccccc21
2.38	IUPAC digitized pKa	0	-1	O=C1C=C(O)C(=O)c2ccccc21	O=C1C=C([O-])C(=O)c2ccccc21	mol11172	O=C1C=C(O)C(=O)c2ccccc21
3.19	Datawarrior	0	-1	O=C1C=C(O)C(=O)c2ccccc21	O=C1C=C([O-])C(=O)c2ccccc21	mol11172	O=C1C=C(O)C(=O)c2ccccc21
3.1900001	OCHEM	0	-1	O=C1C=C(O)C(=O)c2ccccc21	O=C1C=C([O-])C(=O)c2ccccc21	mol11172	O=C1C=C(O)C(=O)c2ccccc21
2.38000011444092	QSARToolbox	0	-1	O=C1C=C(O)C(=O)c2ccccc21	O=C1C=C([O-])C(=O)c2ccccc21	mol11172	O=C1C=C(O)C(=O)c2ccccc21