pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
7.02	IUPAC digitized pKa	-1	-2	O=Nc1ccc2cc(S(=O)(=O)[O-])ccc2c1O	O=Nc1ccc2cc(S(=O)(=O)[O-])ccc2c1[O-]	mol11442	O=Nc1ccc2cc(S(=O)(=O)O)ccc2c1O