2,4(1H,3H)-Pteridinedione, 6,7-dimethyl- 2,4-Dihydroxy-6,7-dimethylpteridine 5774-32-3 6,7-Dimethyl-2,4(1H,3H)-pteridinedione 6,7-Dimethyllumazine Lumazine, 6,7-dimethyl- NSC45780