pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.0500002	OCHEM	1	0	""	""	mol13672	Cn1ccnc1N=[N+]=[N-]
4.05000019073486	QSARToolbox	1	0	""	""	mol13672	Cn1ccnc1N=[N+]=[N-]