Using CCOc1cc(CO)ccc1Oc1ccccc1CC(=O)OC, BrC(Br)(Br)Br to produce CCOc1cc(CBr)ccc1Oc1ccccc1CC(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.