Using CCOC(=O)c1cnn(Cc2nc(-c3cccc(OCC(F)(F)F)c3)cs2)c1 to produce O=C(O)c1cnn(Cc2nc(-c3cccc(OCC(F)(F)F)c3)cs2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.