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