Using COC(=O)CCCCCc1nn(-c2ccc([N+](=O)[O-])cc2)c2c1CCC2 to produce O=C(O)CCCCCc1nn(-c2ccc([N+](=O)[O-])cc2)c2c1CCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.