Using CC(O)c1nnc(-c2ccc3occ(-c4cccc(OC(F)(F)F)c4)c3c2)o1 to produce CC(=O)c1nnc(-c2ccc3occ(-c4cccc(OC(F)(F)F)c4)c3c2)o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.