Using COc1ccc(C(C)(C=CCc2ccc(F)c(Oc3ccccc3)c2)C(F)(F)F)cc1 to produce COc1ccc(C(C)(CCCc2ccc(F)c(Oc3ccccc3)c2)C(F)(F)F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.