Using COc1ccc(Br)c(CO[Si](C(C)C)(C(C)C)C(C)C)c1, CC(C)OB(OC(C)C)OC(C)C to produce COc1ccc(B(O)O)c(CO[Si](C(C)C)(C(C)C)C(C)C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.