Using CC(C(=O)NC1CC1)c1ccc(C2CCN(C(=O)OC(C)(C)C)CC2)cc1 to produce CC(C(=O)NC1CC1)c1ccc(C2CCNCC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.