pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.09	IUPAC digitized pKa	0	-1	O=S(=O)(O)c1cccc2ncc(O)cc12,O=S(=O)([O-])c1cccc2[nH+]cc(O)cc12	O=S(=O)([O-])c1cccc2ncc(O)cc12	mol7752	O=S(=O)(O)c1cccc2ncc(O)cc12
8.66	IUPAC digitized pKa	-1	-2	O=S(=O)([O-])c1cccc2ncc(O)cc12	O=S(=O)([O-])c1cccc2ncc([O-])cc12	mol7752	O=S(=O)(O)c1cccc2ncc(O)cc12