Using COC=C(CCC(F)(F)F)c1ccc(-c2ccc(C(F)(F)F)cc2)nc1 to produce O=CC(CCC(F)(F)F)c1ccc(-c2ccc(C(F)(F)F)cc2)nc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.