pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.62	IUPAC digitized pKa	0	-1	O=C(O)C(O)(C(=O)O)C1CCCCC1	O=C([O-])C(O)(C(=O)O)C1CCCCC1	mol10921	O=C(O)C(O)(C(=O)O)C1CCCCC1
4.78	IUPAC digitized pKa	-1	-2	O=C([O-])C(O)(C(=O)O)C1CCCCC1	O=C([O-])C(O)(C(=O)[O-])C1CCCCC1	mol10921	O=C(O)C(O)(C(=O)O)C1CCCCC1