Using CC1(C)OB(B2OC(C)(C)C(C)(C)O2)OC1(C)C, C[Si](C)(C)CCOCn1ncc(Br)c1C=O to produce C[Si](C)(C)CCOCn1ncc(B(O)O)c1C=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.