Using C[N+](=O)[O-], COC(=O)C=Cc1ccc(Cl)c(Cl)c1 to produce COC(=O)CC(C[N+](=O)[O-])c1ccc(Cl)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.