1,4-Dihydro-2,3-quinoxalinedione 15804-19-0 2,3(1H,4H)-Quinoxalinedione 2,3-Dihydroxyquinoxaline 2,3-QUINOXALINEDIOL 2,3-Quinoxalinedione, 1,4-dihydro- 6287-20-3 AI3-03736 EINECS 239-901-0 NSC 8698 Quinoxaline, 2,3-dihydroxy- Quinoxaline-2,3-diol USAF EK-6232