Using O=C1CCC(=O)N1Br, CC(=O)Oc1ccc2c(c1)C1CCN(C)C(C1)N2C to produce CC(=O)Oc1cc(Br)c2c(c1)C1CCN(C)C(C1)N2C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.