Using CC(=O)OCc1cc(-c2cnn3c(C(F)(F)F)cc(-c4ccc(C(F)(F)F)cc4)nc23)ccn1 to produce OCc1cc(-c2cnn3c(C(F)(F)F)cc(-c4ccc(C(F)(F)F)cc4)nc23)ccn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.