Using CC(C)(C)OC(=O)N1CC(C#N)C1, C[Si](C)(C)[N-][Si](C)(C)C to produce CC1(C#N)CN(C(=O)OC(C)(C)C)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.