Using CC(C)(C)c1ccc(-c2cn3nc(CO)cc3c(=O)[nH]2)cc1 to produce CC(C)(C)c1ccc(-c2cn3nc(C=O)cc3c(=O)[nH]2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.