Using COC1=C(C(=O)O)N2C(=O)[C@@H](NC(=O)CBr)[C@H]2SC1, [N-]=[N+]=[N-] to produce COC1=C(C(=O)O)N2C(=O)[C@@H](NC(=O)CN=[N+]=[N-])[C@H]2SC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.