Using [N-]=[N+]=[N-], Cc1ccc(Cl)cc1[C@H](OCCOS(C)(=O)=O)[C@@H]1CCCN(C(=O)OC(C)(C)C)C1 to produce Cc1ccc(Cl)cc1[C@H](OCCN=[N+]=[N-])[C@@H]1CCCN(C(=O)OC(C)(C)C)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.