Using CN(CC[C@H](c1ccccc1)N1C(=O)C2(CCCCC2)c2ccccc21)C(=O)OC(C)(C)C to produce CNCC[C@H](c1ccccc1)N1C(=O)C2(CCCCC2)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.