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