Acetyl diisoamylene

3,4,5,6,6-Pentamethyl-3-hepten-2-one is a mixture of double bond isomers. It is a colorless to slightly yellow liquid with a complex wood, floral note with amber and violet nuances and is used in perfume oils for a wide range of applications, especially in perfume oils for soaps, shower gels, and shampoos.
The material is prepared by acetylation of diisoamylene with acetic anhydride or acetyl chloride under boron trifluoride etherate catalysis.

Colorless to pale yellow transparent liquid

Koavone® (IFF), Mulantone (YingHai).