Using CCOC(=O)C(C(O)CCCl)N1CCC1=O, [N-]=[N+]=[N-] to produce CCOC(=O)C(C(O)CCN=[N+]=[N-])N1CCC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.