Using C[Si](C)(C)OCCC(O)(O)O[Si](C)(C)C, O=C1CCc2cc(Br)ccc2C1 to produce CC1COC2(CCc3cc(Br)ccc3C2)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.