Using CC(C(=O)OC(C)(C)C)N1C(=O)C(N=[N+]=[N-])CCc2ccccc21 to produce CC(C(=O)OC(C)(C)C)N1C(=O)C(N)CCc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.