Using CC(C)(C)OC(=O)[C@@H](N)c1ccc(O)cc1, COc1ccc(CC(=O)Nc2ccc(C(=O)O)cc2)cc1 to produce COc1ccc(CC(=O)Nc2ccc(C(=O)N[C@H](C(=O)OC(C)(C)C)c3ccc(O)cc3)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.