Using O=C1CCC(N2C(=O)c3ccccc3C2=O)c2c(F)ccc([N+](=O)[O-])c21 to produce Nc1ccc(F)c2c1C(=O)CCC2N1C(=O)c2ccccc2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.