Using CCCCOC(=O)N1CCN(C(=O)[C@H](CO)NC(=O)OC(C)(C)C)CC1 to produce CCCCOC(=O)N1CCN(C(=O)C(N)CO)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.