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