pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
7.32	IUPAC digitized pKa	-1	-2	O=Nc1ccc2c(S(=O)(=O)[O-])cccc2c1O	O=Nc1ccc2c(S(=O)(=O)[O-])cccc2c1[O-]	mol11440	O=Nc1ccc2c(S(=O)(=O)O)cccc2c1O