pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
3.19	IUPAC digitized pKa	0	-1	O=Nc1ccc2cccc(S(=O)(=O)O)c2c1O	O=Nc1ccc2cccc(S(=O)(=O)[O-])c2c1O	mol11441	O=Nc1ccc2cccc(S(=O)(=O)O)c2c1O
7.74	IUPAC digitized pKa	-1	-2	O=Nc1ccc2cccc(S(=O)(=O)[O-])c2c1O	O=Nc1ccc2cccc(S(=O)(=O)[O-])c2c1[O-]	mol11441	O=Nc1ccc2cccc(S(=O)(=O)O)c2c1O