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