Using COC(=O)c1nc(CC(c2ccccc2)c2ccccc2)[nH]c(=O)c1O to produce O=C(O)c1nc(CC(c2ccccc2)c2ccccc2)[nH]c(=O)c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.