Using C=CCn1nc(-c2ccc(OC)cc2)c2cccc(C(F)(F)F)c21 to produce C=CCn1nc(-c2ccc(O)cc2)c2cccc(C(F)(F)F)c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.