pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
7.5	IUPAC digitized pKa	0	-1	O=[N+]([O-])c1cccc(S(=O)(=O)Nc2ccccc2)c1	O=[N+]([O-])c1cccc(S(=O)(=O)[N-]c2ccccc2)c1	mol792	O=[N+]([O-])c1cccc(S(=O)(=O)Nc2ccccc2)c1