pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
1.73	IUPAC digitized pKa	1	0	C[NH+](c1ccccn1)S(C)(=O)=O,CN(c1cccc[nH+]1)S(C)(=O)=O	CN(c1ccccn1)S(C)(=O)=O	mol2441	CN(c1ccccn1)S(C)(=O)=O