Using CC1(C)C(=O)N(Br)C(=O)N1Br, CC(=O)O[C@@H]1CC2=CC[C@H]3[C@@H]4CC[C@H]([C@H](C)CC[C@@H](F)C(C)(C)O)[C@@]4(C)CC[C@@H]3[C@@]2(C)[C@@H](OC(C)=O)C1 to produce CC(=O)O[C@@H]1CC2=CC(Br)[C@H]3[C@@H]4CC[C@H]([C@H](C)CC[C@@H](F)C(C)(C)O)[C@@]4(C)CC[C@@H]3[C@@]2(C)[C@@H](OC(C)=O)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.