Using O=S(Cl)Cl, CCOC(=O)N1CCN(CC(O)c2ccc(F)cc2)CC1 to produce CCOC(=O)N1CCN(CC(Cl)c2ccc(F)cc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.