pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
8.74	IUPAC digitized pKa	1	0	COC(=O)[C@H]([NH3+])CCN,COC(=O)[C@H](N)CC[NH3+]	COC(=O)[C@H](N)CCN	mol8521	COC(=O)C(N)CCN
6.23	IUPAC digitized pKa	2	1	COC(=O)[C@H]([NH3+])CC[NH3+]	COC(=O)[C@H]([NH3+])CCN,COC(=O)[C@H](N)CC[NH3+]	mol8521	COC(=O)C(N)CCN