Using CC(C)[C@H](NC(=O)OC(C)(C)C)C(=O)N[C@@H](C)C(=O)N1CCC[C@@H](C(=O)OCC(Cl)(Cl)Cl)N1 to produce CC(C)[C@H](NC(=O)OC(C)(C)C)C(=O)N[C@@H](C)C(=O)N1CCC[C@@H](C(=O)O)N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.