pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.2	IUPAC digitized pKa	1	0	Cc1c[nH+]cn(C)c1=O	Cc1cncn(C)c1=O	mol7334	Cc1cncn(C)c1=O