Using Clc1cc(Br)ccc1CBr, O=C1CCCN1[C@H]1CC[C@H](F)CC1 to produce O=C1C(Cc2ccc(Br)cc2Cl)CCN1[C@H]1CC[C@H](F)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.