Using O=C(NCCN1CCC(n2c(=O)[nH]c3cc(Cl)ccc32)CC1)c1ccccc1[N+](=O)[O-] to produce Nc1ccccc1C(=O)NCCN1CCC(n2c(=O)[nH]c3cc(Cl)ccc32)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.