Using COc1cc(Br)c(C)cc1OCOCC[Si](C)(C)C, COB(OC)OC to produce COc1cc(B(O)O)c(C)cc1OCOCC[Si](C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.