1,1,4,4,8,8,11,11-octamethyl-6-thia-12,13-diazadispiro[4.1.4⁷.2⁵]tridec-12-ene

2,2,5,5-Tetramethylcyclopentanon-p-tolylsulfonylhydrazon

2,2,6,6-Tetramethylcyclohexanon-p-tolylsulfonylhydrazon

2-diazo-1,1,3,3-tetramethylcyclohexane

2,2,5,5-tetramethylcyclopentanethione