Using CCCCCCc1ccc(OC)c(-c2ccc(C(=O)C(F)(F)F)cc2)c1OC to produce CCCCCCc1ccc(O)c(-c2ccc(C(=O)C(F)(F)F)cc2)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.