pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
7.72	IUPAC digitized pKa	-1	-2	Cc1ccc(N=Nc2cc(S(=O)(=O)[O-])ccc2O)cc1	Cc1ccc(N=Nc2cc(S(=O)(=O)[O-])ccc2[O-])cc1	mol11920	Cc1ccc(N=Nc2cc(S(=O)(=O)O)ccc2O)cc1