shionone

Etymology
? +

Noun

 * 1)  A tetracyclic triterpenoid ketone (1R,4aS,4bS,6aS,8R,10aR,10bS,12aS)-1,4b,6a,8,10a,12a-hexamethyl-8-(4-methylpent-3-en-1-yl)hexadecahydrochrysen-2(1H)-one