pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
8.7	IUPAC digitized pKa	-2	-3	O=S(=O)([O-])c1cc(O)cc2c(S(=O)(=O)[O-])cccc12	O=S(=O)([O-])c1cc([O-])cc2c(S(=O)(=O)[O-])cccc12	mol11314	O=S(=O)(O)c1cc(O)cc2c(S(=O)(=O)O)cccc12