Using CN1CCN(c2cc(N3Cc4cc(Br)ccc4CC3CO[Si](C)(C)C(C)(C)C)nc(N)n2)CC1 to produce CN1CCN(c2cc(N3Cc4cc(Br)ccc4CC3CO)nc(N)n2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.