2,3-Dimethylquinoxaline 1,4-dioxide 2,3-Dimethylquinoxaline dioxide 4-23-00-01277 (Beilstein Handbook Reference) 5432-74-6 BRN 0159641 E-130 NSC 21658 NSC 47511 Quinoxaline, 2,3-dimethyl-, 1,4-dioxide