Using COc1ccc2c(c1)Sc1cc(OC)c(Cl)cc1C(O)C2, Cl to produce COc1ccc2c(c1)Sc1cc(OC)c(Cl)cc1C(Cl)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.