Using COc1cc2ncnc(N3CCc4ccc(N)cc43)c2cc1OC, [N-]=[N+]=[N-] to produce COc1cc2ncnc(N3CCc4ccc(N=[N+]=[N-])cc43)c2cc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.