Using CCOP(=O)(CC(=O)OC(C)(C)C)OCC, C[C@@H](CBr)CO[Si](c1ccccc1)(c1ccccc1)C(C)(C)C to produce CCOP(=O)(OCC)[C@@H](CC(C)CO[Si](c1ccccc1)(c1ccccc1)C(C)(C)C)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.