pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
1.75	IUPAC digitized pKa	0	-1	O=S(=O)([O-])c1cccc[nH+]1,O=S(=O)(O)c1ccccn1	O=S(=O)([O-])c1ccccn1	mol6555	O=S(=O)(O)c1ccccn1