pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
5.4	IUPAC digitized pKa	0	-1	Cc1nn2cn[nH]c2nc1=O	Cc1nn2cn[n-]c2nc1=O	mol9354	Cc1nn2cn[nH]c2nc1=O