2,2,5,5-tetramethylcyclopent-3-en-1-one

2,2,4,4-tetramethylcyclopentane-1,3-dione

2,2,5,5-tetramethyl-3-hydroxycyclopentanone

2,4-二溴-2,4-二甲基-3-戊酮

2,2,4,4-tetramethyl-3-oxocyclopentyl methanesulfonate