Using COC(=O)c1ccc(CN=[N+]=[N-])cc1S(=O)(=O)NC(C)(C)C to produce COC(=O)c1ccc(CN)cc1S(=O)(=O)NC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.