pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.8	IUPAC digitized pKa	0	-1	CC1=C(O)[C@@H](C)C1=O	CC1=C([O-])[C@@H](C)C1=O	mol9548	CC1=C(O)C(C)C1=O