Using [N-]=[N+]=[N-], COC(=O)C1=C[C@H]2OS(=O)O[C@H]2[C@H](OC(=O)c2ccccc2)C1 to produce COC(=O)C1=C[C@H](N=[N+]=[N-])[C@@H](O)[C@H](OC(=O)c2ccccc2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.