Using O=C(O)[C@H]([C@@H]1CC(=O)N(C(=O)OCc2ccccc2)O1)N1C(=O)c2ccccc2C1=O to produce O=C1CC(C(C(=O)O)N2C(=O)c3ccccc3C2=O)ON1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.