4-Heptanone
4-Heptanone or heptan-4-one is an organic compound with the formula (CH3CH2CH2)2CO. It is a colorless liquid. Synthesis
The compound is synthesized by ketonization, involving the pyrolysis of iron(II) butyrate. Butyrone is used in the synthesis of 3-propylthio-4-heptanol [1838-73-9], which has found use as a flavor augmenting or enhancing composition in foodstuffs. References 

Heptanones