Using CC(C)C[C@H](N)C(=O)Nc1ccccc1, CC(C)(C)OC(=O)NC(C)(C)C(=O)O to produce CC(C)C[C@H](NC(=O)C(C)(C)NC(=O)OC(C)(C)C)C(=O)Nc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.