Using C[C@H](NC(=O)OCc1ccccc1)C(=O)O, NCC(=O)c1ccccc1 to produce CC(NC(=O)OCc1ccccc1)C(=O)NCC(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.