pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
5.07	IUPAC digitized pKa	1	0	O=[N+]([O-])c1cccc(-n2cc[nH+]c2)c1	O=[N+]([O-])c1cccc(-n2ccnc2)c1	mol6697	O=[N+]([O-])c1cccc(-n2ccnc2)c1