Using CCOC(=O)CC(C)=O, COc1ccc(NC(C)=O)cc1[N+](=O)[O-] to produce CCOC(=O)CC(C)Nc1cc(NC(C)=O)ccc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.