Using CC(C)(C)[Si](C)(C)Oc1ccc2cc(Br)ccc2c1, CCOC(=O)C(C)(C)C(=O)OCC to produce CCOC(=O)C(C)(C)C(=O)c1ccc2cc(O[Si](C)(C)C(C)(C)C)ccc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.