pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.09	IUPAC digitized pKa	0	-1	O=C([O-])c1cc(Cl)cc[nH+]1,O=C(O)c1cc(Cl)ccn1	O=C([O-])c1cc(Cl)ccn1	mol9859	O=C(O)c1cc(Cl)ccn1