pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.8	IUPAC digitized pKa	0	-1	O=C(O)c1cc(O)ncn1	O=C([O-])c1cc(O)ncn1	mol4117	O=C(O)c1cc(O)ncn1
8.4	IUPAC digitized pKa	-1	-2	O=C([O-])c1cc(O)ncn1	O=C([O-])c1cc([O-])ncn1	mol4117	O=C(O)c1cc(O)ncn1