pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.45	OCHEM	0	-1	CC(=O)NCCC(=O)O	CC(=O)NCCC(=O)[O-]	mol29413	CC(=O)NCCC(=O)O
4.4443	OCHEM	0	-1	CC(=O)NCCC(=O)O	CC(=O)NCCC(=O)[O-]	mol29413	CC(=O)NCCC(=O)O