Using CCCC1CCC(C2C=Cc3c4c(c(F)c(F)c3O2)OCCC4)CC1 to produce CCCC1CCC(C2CCc3c4c(c(F)c(F)c3O2)OCCC4)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.