1,3,4-Thiadiazole-2,5-dithiol 1,3,4-Thiadiazolidine-2,5-dithione 1072-71-5 2,5-Dimercapto-1,3,4-thiadiazole 2,5-Dimercapto-1,3,4-thiodiazole 2,5-Dimercapto-thiadiazole 2,5-Dimercaptothiadiazole Bismuthiol I Dimercaptothiadiazole NSC4645 Usaf a-8354 Usaf fa-4 WLN: T5NN DSJ CSH ESH