pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.55	IUPAC digitized pKa	0	-1	CC(C)[C@@H](ON)C(=O)O,CC(C)[C@@H](O[NH3+])C(=O)[O-]	CC(C)[C@@H](ON)C(=O)[O-]	mol8498	CC(C)C(ON)C(=O)O