Using O=Cc1cccc([N+](=O)[O-])c1, COC(=O)CC(C)=O to produce COC(=O)C(C(C)=O)C(c1cccc([N+](=O)[O-])c1)C(C(C)=O)C(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.