Using CC(C)(C)OC(=O)N1CCC[C@@H](C(=O)OCC(Cl)(Cl)Cl)N1C(=O)OC(C)(C)C to produce COC(=O)[C@@H]1CCCN(C(=O)OC(C)(C)C)N1C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.