Using COC(=O)Cc1cc2ccc(Cl)cc2c(Oc2ccc(S(C)(=O)=O)cc2)c1C to produce COC(=O)Cc1cc2ccccc2c(Oc2ccc(S(C)(=O)=O)cc2)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.