Using CCO, CCOc1ccc(C2=CCC(C3CCC4(CC3)OCCO4)CC2)c(F)c1F to produce CCOc1ccc(C2CCC(C3CCC4(CC3)OCCO4)CC2O)c(F)c1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.