Using [N-]=[N+]=[N-], C[C@H]1OS(=O)(=O)N(C(=O)OC(C)(C)C)[C@@H]1C(=O)OCc1ccccc1 to produce C[C@H](N=[N+]=[N-])[C@H](NC(=O)OC(C)(C)C)C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.