2-methyl-2-phenylsulfanylcyclopentane-1,3-dione

2-methyl-2-(2-oxopropyl)cyclopentane-1,3-dione

2-Methyl-2-(2-nitro-propyl)-cyclopentane-1,3-dione

(2-methyl-3-oxo-4-prop-2-enylcyclopenten-1-yl) acetate

(4-but-2-enyl-2-methyl-3-oxocyclopenten-1-yl) acetate