1,2,4-Thiadiazole, 5-amino-3-(methylthio)- 3-Methylmercapto-5-amino-1,2,4-thiadiazole 4-27-00-08161 (Beilstein Handbook Reference) 5-Amino-3-(methylthio)-1,2,4-thiadiazole 6913-13-9 BRN 0113672 NSC 522190