Using COC(=O)C(C(=O)OC)c1ncc(C(F)(F)F)cc1[N+](=O)[O-] to produce Cc1ncc(C(F)(F)F)cc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.