Using Oc1ccccc1, O=C([O-])CCC(=O)C(=O)OCc1ccc([N+](=O)[O-])cc1 to produce O=C1CCC(Oc2ccccc2)(C(=O)OCc2ccc([N+](=O)[O-])cc2)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.