pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.8	IUPAC digitized pKa	-1	-2	O=C1C([O-])=C(O)C(=O)C(O)=C1O	O=C1C([O-])=C(O)C(=O)C([O-])=C1O,O=C1C([O-])=C(O)C(=O)C(O)=C1[O-]	mol9533	O=C1C(O)=C(O)C(=O)C(O)=C1O
6.8	IUPAC digitized pKa	-2	-3	O=C1C([O-])=C(O)C(=O)C([O-])=C1O,O=C1C([O-])=C(O)C(=O)C(O)=C1[O-]	O=C1C([O-])=C([O-])C(=O)C(O)=C1[O-]	mol9533	O=C1C(O)=C(O)C(=O)C(O)=C1O