pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
7.67	IUPAC digitized pKa	-1	-2	O=C([O-])c1occc(=O)c1O	O=C([O-])c1occc(=O)c1[O-]	mol9531	O=C(O)c1occc(=O)c1O