pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
5.6	IUPAC digitized pKa	0	-1	O=C1C=CC(=NO)C=C1Cl	O=C1C=CC(=N[O-])C=C1Cl	mol9858	O=C1C=CC(=NO)C=C1Cl