Using CC(C)(C)OC(=O)N1CC(Nc2cccc(Cl)c2)CC1C(=O)O to produce O=C(O)[C@@H]1C[C@H](Nc2cccc(Cl)c2)CN1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.