Using O=C(N1CCCC1)C1(c2ccc(Cl)c([N+](=O)[O-])c2)CC1 to produce Nc1cc(C2(C(=O)N3CCCC3)CC2)ccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.