1,3,4-Thiadiazole-2(3H)-thione, 5-amino- 1,3,4-Thiadiazole-2-thiol, 5-amino- 2-Amino-.delta.(2)-1,3,4-thiadiazoline-5-thione 2-Amino-1,3,4-thiadiazole-5-thiol 2-Amino-5-mercapto-1,3,4-thiadiazole 2-Mercapto-5-amino-1,3,4-thiadiazole 2-Thiol-5-amino-1,3,4-thiadiazole 2349-67-9 5-Amino-1,3,4-thiadiazole-2-thiol 5-Amino-1,3,4-thiadiazoline-2-thione 5-Amino-2-mercapto-1,3,4-thiadiazole NSC21402 Usaf pd-25 WLN: T5NN DSJ CZ ESH