Using COc1ccc([N+](=O)[O-])c([N+](=O)[O-])c1C, [N-]=[N+]=[N-] to produce COc1ccc([N+](=O)[O-])c(N=[N+]=[N-])c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.