Using Cc1ccc(S(=O)(=O)n2c3c(c4c(Cl)c(Cl)ccc42)CCCC3=O)cc1, O=S(=O)(NF)c1ccccc1 to produce Cc1ccc(S(=O)(=O)n2c3c(c4c(Cl)c(Cl)ccc42)CCC(F)C3=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.