Using CC1(C)[C@@H](NC(=O)OCc2ccccc2)C[C@H]1C(=O)O, CCN1CCNCC1 to produce CCN1CCN(C(=O)[C@@H]2C[C@H](NC(=O)OCc3ccccc3)C2(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.