Using Nc1cc(Br)cc(Oc2ccc(F)cc2F)c1, CCS(=O)(=O)Cl to produce CCS(=O)(=O)Nc1cc(Br)cc(Oc2ccc(F)cc2F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.