Using O=C([O-])CC[C@H](NC(=O)[C@@H]1C[C@@H](O)CN1C(=O)C(Cc1ccccc1)(Cc1ccccc1)NC(=O)OCc1ccccc1)C(=O)[O-] to produce NCC(=O)N1C[C@H](O)C[C@H]1C(=O)N[C@@H](CCC(=O)O)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.