pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.81	IUPAC digitized pKa	0	-1	Nc1ccc(S(=O)(=O)O)c2ccccc12	Nc1ccc(S(=O)(=O)[O-])c2ccccc12	mol5284	Nc1ccc(S(=O)(=O)O)c2ccccc12