2,2,5,5-tetramethyl-4-phenyl-3-azahexane-3-nitroxide
2,2,5,5-tetramethyl-4-(4-trifluoromethylphenyl)-3-azahexane-3-nitroxide
5-(tert-Butyl)-1,2,2-trimethyl-3-(2,4,6-tribromphenyl)-4-imidazolidinon
5-(tert-Butyl)-1,2,2-trimethyl-3-(4-nitrophenyl)-4-imidazolidinon
2,3-Di(tert-butyl)-4-(4-nitrophenylimino)-1,2-oxazetidin