Using O=C(O)c1ccc(CN2CCCCC2)cc1, Nc1cccc(Br)c1 to produce O=C(Nc1cccc(Br)c1)c1ccc(CN2CCCCC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.