Using [N-]=[N+]=[N-], OC[C@H]1O[C@H](O[C@H]2[C@H](O)[C@@H](O)[C@H](Br)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@@H]1O to produce [N-]=[N+]=N[C@@H]1O[C@H](CO)[C@@H](O[C@H]2O[C@H](CO)[C@@H](O)[C@H](O)[C@H]2O)[C@H](O)[C@H]1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.