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