Using COC(=O)[C@H](Cc1ccccc1)NC(=O)[C@H](CC(=O)OC(C)(C)C)NC(=O)[C@H](CCC(N)=O)NC(=O)[C@@H](NC(=O)[C@H](Cc1ccc(OC(C)(C)C)cc1)NC(=O)OCc1ccccc1)[C@@H](C)OC(C)(C)C to produce COC(=O)[C@H](Cc1ccccc1)NC(=O)[C@H](CC(=O)OC(C)(C)C)NC(=O)[C@H](CCC(N)=O)NC(=O)[C@@H](NC(=O)[C@@H](N)Cc1ccc(OC(C)(C)C)cc1)[C@@H](C)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.