Using CC[C@@H](NC(=O)OC(C)(C)C)C(=O)O, N#CC1CNC1 to produce CC[C@@H](NC(=O)OC(C)(C)C)C(=O)N1CC(C#N)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.