Using CC[C@H](C)[C@H](NC(=O)C[C@H](NC(=O)OCc1ccccc1)[C@H](Cc1ccccc1)NC(=O)[C@@H](NC(=O)[C@H](CC(C)C)NC(=O)CC(C)C)C(C)(C)C)C(=O)N[C@H](C(=O)OC)C(C)C to produce CC[C@H](C)[C@H](NC(=O)C[C@H](N)[C@H](Cc1ccccc1)NC(=O)[C@@H](NC(=O)[C@H](CC(C)C)NC(=O)CC(C)C)C(C)(C)C)C(=O)N[C@H](C(=O)OC)C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.