Using O=CC(=O)O, O=C1CCCc2ccc([N+](=O)[O-])cc21 to produce O=C(O)C=C1CCc2ccc([N+](=O)[O-])cc2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.