Using COC(=O)[C@@H]1C[C@H](OS(C)(=O)=O)CN1C(=O)OC(C)(C)C, [N-]=[N+]=[N-] to produce COC(=O)[C@@H]1C[C@@H](N=[N+]=[N-])CN1C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.