(2,2,5,5-tetramethylcyclopentylidene)hydrazine

2,6-dimethyl-N-(2,2,5,5-tetramethylcyclopentylidene)aniline

2,6-dimethyl-4-nitro-N-(2,2,5,5-tetramethylcyclopentylidene)aniline

2,2,5,5-四甲基己烷二酸

2,2-二甲基环戊酮