pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
10.4	IUPAC digitized pKa	1	0	N[C@@H]1C[C@H](N)C[C@@H]([NH3+])C1	N[C@H]1C[C@H](N)C[C@@H](N)C1	mol5969	N[C@H]1C[C@H](N)C[C@@H](N)C1
8.7	IUPAC digitized pKa	2	1	NC1C[C@H]([NH3+])C[C@@H]([NH3+])C1	N[C@@H]1C[C@H](N)C[C@@H]([NH3+])C1	mol5969	N[C@H]1C[C@H](N)C[C@@H](N)C1
6.9	IUPAC digitized pKa	3	2	[NH3+]C1C[C@H]([NH3+])C[C@@H]([NH3+])C1	NC1C[C@H]([NH3+])C[C@@H]([NH3+])C1	mol5969	N[C@H]1C[C@H](N)C[C@@H](N)C1