Using Oc1ccc(Br)cc1, CCOC(=O)c1cc(CBr)n(-c2c(Cl)cccc2Cl)n1 to produce CCOC(=O)c1cc(COc2ccc(Br)cc2)n(-c2c(Cl)cccc2Cl)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.