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