Using Nc1ccccc1N, CC(C)(C)OC(=O)N[C@@H](Cc1ccccc1)C(=O)N[C@@H](Cc1ccc(C2=CC(=O)NS2(=O)=O)cc1)C(=O)O to produce CC(C)(C)OC(=O)N[C@@H](Cc1ccccc1)C(=O)NC(Cc1ccc(C2=CC(=O)NS2(=O)=O)cc1)C(=O)Nc1ccccc1N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.