Using CO[C@@H]1CN(C(=O)OC(C)(C)C)C[C@H]1N=[N+]=[N-] to produce CO[C@@H]1CN(C(=O)OC(C)(C)C)C[C@H]1N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.