Using CC1(C)OB(c2cccc(Cl)c2)OC1(C)C, COC(=O)c1cncc(Br)c1 to produce COC(=O)c1cncc(-c2cccc(Cl)c2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.