Using O=C(Cl)c1c(Cl)cccc1Cl, Nc1cccc(C2CCNCC2)c1 to produce Nc1cccc(C2CCN(C(=O)c3c(Cl)cccc3Cl)CC2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.