Using O=S(Cl)Cl, CCCCOc1c(CO)n(CC(C)(C)C)c(=O)c2cc(F)ccc12 to produce CCCCOc1c(CCl)n(CC(C)(C)C)c(=O)c2cc(F)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.