pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.30000019073486	QSARToolbox	-1	-2	O=C([O-])c1nncnc1O	O=C([O-])c1nncnc1[O-]	mol36736	O=C(O)c1nncnc1O