Using O=C([O-])[O-], O=C(OCc1ccccc1)[C@@H]1CNC(=O)N1C(=O)OCc1ccccc1 to produce CN1C[C@@H](C(=O)OCc2ccccc2)N(C(=O)OCc2ccccc2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.