Using CC(C)(C)C(=O)Oc1ccc(Br)c(CO[Si](C)(C)C(C)(C)C)c1 to produce COC(=O)C=Cc1ccc(OC(=O)C(C)(C)C)cc1CO[Si](C)(C)C(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.