Using CC(C)(C)[S@@](=O)N[C@@](CF)(CCO)c1cc(Br)ccc1F to produce CC(C)(C)[S@@](=O)N[C@@](CF)(CC=O)c1cc(Br)ccc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.