Using Cc1[nH]nc(C(C)C)c1Oc1cc(C#N)cc(C#N)c1, CC(C)(C)[Si](C)(C)OCCBr to produce Cc1c(Oc2cc(C#N)cc(C#N)c2)c(C(C)C)nn1CCO[Si](C)(C)C(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.