2,2,5,5-四甲基咪唑烷-1-鎓-4-硫酮

cyclohexanespiro-5'-(2',2'-dimethylimidazolidin-4'-thione)

7,14-diazadispiro[5.1.5⁸.2⁶]pentadecane-15-thione

1,3-二氮杂螺[4,5]癸烷-2,4-二酮

异氰基环己烯