Using CC(C)(C)OC(=O)N[C@H](C(=O)N1C[C@H](Oc2ccc(Cl)cn2)C[C@H]1C(=O)N[C@@H](CC1CCC1)C(O)C(=O)NC1CC1)C(C)(C)C to produce CC(C)(C)[C@H](N)C(=O)N1C[C@H](Oc2ccc(Cl)cn2)C[C@H]1C(=O)N[C@@H](CC1CCC1)C(O)C(=O)NC1CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.