Using Cc1ccccc1NC(=O)c1ccc(CC2CCc3c(ccc(Cl)c3Cl)C2O)cc1, CCN(CC)S(F)(F)F to produce Cc1ccccc1NC(=O)c1ccc(CC2CCc3c(ccc(Cl)c3Cl)C2F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.