pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
1.8	OCHEM	2	1	[NH3+][C@H]1C[C@@H](C(=O)O)[NH2+][C@@H](C(=O)O)C1	[NH3+][C@H]1C[C@@H](C(=O)O)[NH2+][C@@H](C(=O)[O-])C1	mol33231	NC1CC(C(=O)O)NC(C(=O)O)C1