Using CCOC(=O)N1CCc2sc(C(=O)C(F)(F)F)c(Br)c2CC1 to produce CCOC(=O)N1CCc2sc(CC(F)(F)F)c(Br)c2CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.