pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
9.4	IUPAC digitized pKa	1	0	Cn1ccc(=[NH2+])n(C)c1=O	Cn1ccc(=N)n(C)c1=O	mol4225	Cn1ccc(=N)n(C)c1=O