Using CCOC(=O)CBr, Brc1ccc2[nH]c3ccc(Br)cc3c2c1 to produce CCOC(=O)Cn1c2ccc(Br)cc2c2cc(Br)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.