pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.54	IUPAC digitized pKa	0	-1	O=C(O)c1cccnc1Cl	O=C([O-])c1cccnc1Cl	mol9860	O=C(O)c1cccnc1Cl