Using O=C1CCN(C(=O)/C=C/c2ccc(Cl)c(Cl)c2)CCN1, COC(=O)CBr to produce COC(=O)CN1CCN(C(=O)/C=C/c2ccc(Cl)c(Cl)c2)CCC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.