pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.2	IUPAC digitized pKa	0	-1	COc1cc(C=O)cc([N+](=O)[O-])c1O	COc1cc(C=O)cc([N+](=O)[O-])c1[O-]	mol10580	COc1cc(C=O)cc([N+](=O)[O-])c1O