pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
0.59	IUPAC digitized pKa	1	0	C/C(=[NH+]\NC(N)=O)C(=O)O	C/C(=N\NC(N)=O)C(=O)O	mol8899	C/C(=N\NC(N)=O)C(=O)O