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