Using O=C(CCCCBr)N1CCc2ccccc21, Clc1cccc(N2CCNCC2)c1Cl to produce O=C(CCCCN1CCN(c2cccc(Cl)c2Cl)CC1)N1CCc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.