hemiterpene
Hemiterpenes are a class of organic compounds derived from isoprene units. They are the simplest type of terpenoid, consisting of only one isoprene unit. Isoprene, also known as 2-methylbuta-1,3-diene, is a volatile five-carbon hydrocarbon. The basic structure of a hemiterpene is therefore a C5 skeleton.
Naturally occurring hemiterpenes are relatively uncommon compared to other terpene classes like monoterpenes (C10) or sesquiterpenes
Another well-known hemiterpene is prenol (3-methylbut-2-en-1-ol). Prenol and its isomer isoprenol (3-methylbut-3-en-1-ol) are found in various