Using Cc1c([N+](=O)[O-])ccc(C(=O)O)c1Cc1ccccc1 to produce O=C(O)c1ccc([N+](=O)[O-])cc1Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.