Using O=C(CCC1C(=O)C2CCN1CC2)c1ccc(Cl)c([N+](=O)[O-])c1 to produce Nc1cc(C(=O)CCC2C(=O)C3CCN2CC3)ccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.