3,3,6,6-tetramethyl-4,5-dihydropyridazine

N-(2,2,5,5-tetramethylpyrrolidinyl)nitrene

1-chloromethyl-1,2,2-trimethylcyclobutane

1-amino-2,2,5,5-tetramethylpyrrolidine

1-nitroso-2,2,5,5-tetramehylpyrrolidine