pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
6.97	IUPAC digitized pKa	0	-1	Cc1nc2cncnc2nc1O	Cc1nc2cncnc2nc1[O-]	mol8202	Cc1nc2cncnc2nc1O