Using CC(=O)N1CC(C)(C)c2cc(F)c(S(=O)(=O)CCCCl)cc21 to produce CC(=O)N1CC(C)(C)c2cc(F)c(S(=O)(=O)C3CC3)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.