Using COc1ccc2[nH]c(C(=O)N3CC(CCl)c4c3cc([N+](=O)[O-])c3ccccc43)cc2c1 to produce COc1ccc2[nH]c(C(=O)N3CC(CCl)c4c3cc(N)c3ccccc43)cc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.