pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
8.6	IUPAC digitized pKa	-1	-2	O=Nc1c(S(=O)(=O)[O-])cc(O)c2[nH]ncc12,O=Nc1c(S(=O)(=O)O)cc([O-])c2[nH]ncc12	O=Nc1c(S(=O)(=O)[O-])cc([O-])c2[nH]ncc12,O=Nc1c(S(=O)(=O)[O-])cc(O)c2[n-]ncc12	mol10303	O=Nc1c(S(=O)(=O)O)cc(O)c2[nH]ncc12