pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.01999998092651	QSARToolbox	0	-1	COC1=C(C2=C(O)C(=O)C(C)=CC2=O)C(=O)C=C(C)C1=O	COC1=C(C2=C([O-])C(=O)C(C)=CC2=O)C(=O)C=C(C)C1=O	mol36643	COC1=C(C2=C(O)C(=O)C(C)=CC2=O)C(=O)C=C(C)C1=O