Using O=C(O[C@H]1CC[C@@H](c2ccc(Br)cc2)CC1)c1ccccc1F to produce O[C@H]1CC[C@@H](c2ccc(Br)cc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.