Using COC(=O)[C@@H]1CC[C@@H](N=[N+]=[N-])[C@H](O)C1 to produce COC(=O)[C@@H]1CC[C@@H](N)[C@H](O)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.