Using CN1CCNCC1, O=C(O)c1cc2cc([N+](=O)[O-])ccc2[nH]1 to produce CN1CCN(C(=O)c2cc3cc([N+](=O)[O-])ccc3[nH]2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.