Using COc1ccc(-n2ccc3cc(O)ccc3c2=O)cc1, O=C1CCC(=O)N1Br to produce COc1ccc(-n2cc(Br)c3cc(O)ccc3c2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.