Using CC1CC(=O)CC(=O)C1, CNc1c(Cl)ccc(C(=O)O)c1[N+](=O)[O-] to produce CC1CC(=O)C=C(OC(=O)c2ccc(Cl)c(N)c2[N+](=O)[O-])C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.