Using Oc1c(Cl)cc(Br)cc1Cl, COC(=O)[C@@H](O)Cc1ccccc1 to produce COC(=O)[C@@H](Cc1ccccc1)Oc1c(Cl)cc(Br)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.