pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.73000001907349	QSARToolbox	0	-1	O=C1C=C(O)C(=O)C=C1O	O=C1C=C(O)C(=O)C=C1[O-]	mol5631	O=C1C=C(O)C(=O)C=C1O
5.17999982833862	QSARToolbox	-1	-2	O=C1C=C(O)C(=O)C=C1[O-]	O=C1C=C([O-])C(=O)C=C1[O-]	mol5631	O=C1C=C(O)C(=O)C=C1O