Using O=C(CCCc1cn(S(=O)(=O)c2cccc([N+](=O)[O-])c2)c2ccccc12)OCc1ccccc1 to produce O=C(O)CCCc1cn(S(=O)(=O)c2cccc([N+](=O)[O-])c2)c2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.