重氮甲烷

二苯基甲烷硫酮

5,5-diphenyl-2H-1,3,4-thiadiazole

2',5'-dihydrospiro[fenchane-2,2'-(1,3,4)-thiadiazole]

2,2-di-tert-butyl-2,5-dihydro-1,3,4-thiadiazole