pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
6.59	IUPAC digitized pKa	0	-1	Nc1nc(O)c2nn[nH]c2n1	Nc1nc(O)c2nn[n-]c2n1	mol8339	Nc1nc(O)c2nn[nH]c2n1