Using O=C(NCc1ccc2c(c1)OCO2)c1cnc(C(=O)NOCc2ccccc2)c(OCc2ccccc2)c1CO to produce O=C(NCc1ccc2c(c1)OCO2)c1cnc(C(=O)NO)c(O)c1CO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.