pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
1.78	IUPAC digitized pKa	0	-1	O=C(O)c1cc([N+](=O)[O-])cc[n+]1[O-]	O=C([O-])c1cc([N+](=O)[O-])cc[n+]1[O-]	mol9629	O=C(O)c1cc([N+](=O)[O-])cc[n+]1[O-]