Using CCOC(=O)CBr, CC(C)(C)[Si](C)(C)OCC(O)COCc1ccccc1 to produce CCOC(=O)COC(COCc1ccccc1)CO[Si](C)(C)C(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.