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