Dec. 1979 Synthesis of 5,8-Dihydroxynaphtho[2,3-c][l,2,5]thiadiazole-6,9-dione and 6,9-Dihydroxybenzo[g]quinoxaline-5,10-dione James D. Warren*, Ving J. Lee* and Robert B. Angler Department of Chemical Research, American Cyanamid Company, Medical Research Division, Lederle Laboratories, Pearl River, NY 10965 Received April 9, 1979 The synthesis of 5,8-dihydroxynaphtho[2,3-c][l,2,5]thiadiazole-4,9-dione 3, 6,9-dihydroxybenzo[g] ...