Using O=C1NC(=O)c2ccccc21, COC(C)(Cc1c([N+](=O)[O-])ccc(F)c1F)OC to produce COC(C)(Cc1c([N+](=O)[O-])ccc(N2C(=O)c3ccccc3C2=O)c1F)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.