Using O=C(OCc1ccccc1)c1cnn(Cc2nnc(-c3cccc(C(F)(F)F)c3)o2)c1 to produce O=C(O)c1cnn(Cc2nnc(-c3cccc(C(F)(F)F)c3)o2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.