Using CC(C)(C)OC(=O)N[C@@H]1C[C@H](C(=O)O)C1(C)C, CCN1CCNCC1 to produce CCN1CCN(C(=O)[C@H]2C[C@@H](NC(=O)OC(C)(C)C)C2(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.