pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
3.9	IUPAC digitized pKa	0	-1	O=C1C[C@H](C(=O)O)[C@H](C(=O)O)C1	O=C1C[C@H](C(=O)[O-])[C@H](C(=O)O)C1	mol9978	O=C1C[C@H](C(=O)O)[C@H](C(=O)O)C1
5.6	IUPAC digitized pKa	-1	-2	O=C1C[C@H](C(=O)[O-])[C@H](C(=O)O)C1	O=C1C[C@H](C(=O)[O-])[C@H](C(=O)[O-])C1	mol9978	O=C1C[C@H](C(=O)O)[C@H](C(=O)O)C1