Using CCOC(=O)CCn1cc(-c2ccc(F)cc2)n(-c2ccc(Cl)cc2)c1=S to produce O=C(O)CCn1cc(-c2ccc(F)cc2)n(-c2ccc(Cl)cc2)c1=S, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.