Using OB(O)c1ccc(Cl)cc1, CCCC(=O)Nc1nn(COCC[Si](C)(C)C)c2cc(Br)ccc12 to produce CCCC(=O)Nc1nn(COCC[Si](C)(C)C)c2cc(-c3ccc(Cl)cc3)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.