pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
5.38	IUPAC digitized pKa	1	0	Cn1cn[nH+]c1N,Cn1cnnc1[NH3+],Cn1c[nH+]nc1N	Cn1cnnc1N	mol7667	Cn1cnnc1N