Using CC(C)(C)OC(=O)N1CCCC1=O, Fc1cc(Br)c2c(c1)OCCO2 to produce CC(C)(C)OC(=O)N1CCC=C1c1cc(F)cc2c1OCCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.