Using CC(=O)Oc1ccc(-n2c(=O)c3c[nH]c4ccccc4n-3c2=O)cc1 to produce O=c1c2c[nH]c3ccccc3n-2c(=O)n1-c1ccc(O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.