Using CC(O)c1nn(-c2cccc(C(F)(F)F)c2)c2c(c1=O)OCC2 to produce CC(=O)c1nn(-c2cccc(C(F)(F)F)c2)c2c(c1=O)OCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.