pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.64	IUPAC digitized pKa	0	-1	O=C(O)C[C@@H]1CCC(=O)C1	O=C([O-])C[C@@H]1CCC(=O)C1	mol9989	O=C(O)CC1CCC(=O)C1