Using COc1ccc(C(=O)c2cccc([N+](=O)[O-])c2C=CN(C)C)cc1 to produce COc1ccc(C(=O)c2cccc3[nH]ccc23)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.