Using CC(C)(C)c1ccc(C(=O)O)cc1, CC(C)(C)OC(=O)[C@@H](N)Cc1ccc(O)cc1 to produce CC(C)(C)OC(=O)[C@H](Cc1ccc(O)cc1)NC(=O)c1ccc(C(C)(C)C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.