Using O, CC(=O)Oc1ccc2c(c1)CC[C@@H]1[C@@H]2C(CCCCCCl)C[C@]2(C)C(=O)C(Br)C[C@@H]12 to produce C[C@]12CC(CCCCCCl)[C@@H]3c4ccc(O)cc4CC[C@H]3[C@@H]1CC(O)C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.