Using CCOC(=O)C(C#N)(CCNC(=O)OC(C)(C)C)C1CN(C(=O)OC(C)(C)C)C1 to produce CC(C)(C)OC(=O)N1CC(C2(C#N)CCNC2=O)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.