Using CN(Cc1cc(NC(=O)OC(C)(C)C)ccc1C1(C#N)CC1)C(=O)OC(C)(C)C to produce CNCc1cc(N)ccc1C1(C#N)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.