Using CC1=NC(C=Cc2ccc(Br)cc2)(CO[Si](C)(C)C(C)(C)C)CO1 to produce CC1=NC(CCc2ccc(Br)cc2)(CO[Si](C)(C)C(C)(C)C)CO1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.