Using CC(C)C(=O)O[C@@H](OC(=O)OC1CC(=O)NC1=O)C(C)C, NC[C@H](CC(=O)O)c1ccc(Cl)cc1 to produce CC(C)C(=O)O[C@@H](OC(=O)NC[C@H](CC(=O)O)c1ccc(Cl)cc1)C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.