pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
-2.23	IUPAC digitized pKa	1	0	O=[N+]([O-])c1c(Cl)c[n+](O)cc1Cl	O=[N+]([O-])c1c(Cl)c[n+]([O-])cc1Cl	mol6605	O=[N+]([O-])c1c(Cl)c[n+]([O-])cc1Cl