Using CC(F)(C(=O)O)c1ccc(OS(=O)(=O)C(F)(F)F)cc1, CON to produce CONC(=O)C(C)(F)c1ccc(OS(=O)(=O)C(F)(F)F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.