Using CCS, O=C(O)c1cc(Oc2ccc(C(F)(F)F)cc2Cl)ccc1I to produce CCSc1ccc(Oc2ccc(C(F)(F)F)cc2Cl)cc1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.