Using BrCCCn1nnc2ccccc21, O=c1[nH]c2cc(Cl)ccc2n1C1CCNCC1 to produce O=c1[nH]c2cc(Cl)ccc2n1C1CCN(CCCn2nnc3ccccc32)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.