(2S,6R)-2,6-dimethylpiperidin-4-one

3,3,7-Trimethyl-6-octene-2,5-dione

3,3,7,7-tetramethylnonane-2,5,8-trione

3-Isopropyl-6,6-dimethyl-2,4,7-octatrione

4-Acetyl-3,3,7,7-tetramethyl-2,5,8-nonatrione