Using COC(=O)Cc1ccc(B2OC(C)(C)C(C)(C)O2)c(Cl)c1, BrCCCBr to produce COC(=O)C(CCCBr)c1ccc(B2OC(C)(C)C(C)(C)O2)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.