2,2,3,3,4-pentamethylpentane

2-tert-butyl-3,3-dimethylbut-1-en-1-one

2-tert-butyl-3,3-dimethylbutanamide

2,3,3-trimethyl-2-propan-2-ylbutan-1-ol

2,3,3,4,4-Pentamethyl-1-pentene