Using COC(=O)c1ccc2nc(N3CCN(C(=O)[C@H](Cc4cccs4)NC(=O)OC(C)(C)C)CC3)sc2c1 to produce CC(C)(C)OC(=O)N[C@@H](Cc1cccs1)C(=O)N1CCN(c2nc3ccc(C(=O)O)cc3s2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.