Using CCOC(=O)C[C@@H](Cc1ccc(Br)cc1)NC(=O)OC(C)(C)C, OB(O)c1cccc(Cl)c1 to produce CCOC(=O)C[C@@H](Cc1ccc(-c2cccc(Cl)c2)cc1)NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.