4956-10-9 5-(2'-Amino-1',3',4'-thiodiazol-5')-thio-6-azauracil 6-((5-Amino-1,3,4-thiadiazol-2-yl)thio)-as-triazine-3,5(2H,4H)-dione BRN 0551560 NSC 107693 as-Triazine-3,5(2H,4H)-dione, 6-((5-amino-1,3,4-thiadiazol-2-yl)thio)-