Using COC(=O)Cc1cc(C2CCN(S(=O)(=O)c3ccc(Cl)cc3Cl)CC2)c2cc(F)ccc2c1 to produce O=C(O)Cc1cc(C2CCN(S(=O)(=O)c3ccc(Cl)cc3Cl)CC2)c2cc(F)ccc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.