Using COC(=O)c1ccc(OCC2CC(=O)N(c3ccc(C)cc3)C2)cc1, O=C1CCC(=O)N1Br to produce COC(=O)c1ccc(OCC2CC(=O)N(c3ccc(CBr)cc3)C2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.