Using [N-]=[N+]=[N-], COC(=O)[C@H]1[C@@H](c2ccc(N)c(I)c2)C[C@@H]2CC[C@H]1N2C to produce COC(=O)[C@H]1[C@@H](c2ccc(N=[N+]=[N-])c(I)c2)C[C@@H]2CC[C@H]1N2C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.