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Diterpenes are a class of terpenes composed of four isoprene units, often with the molecular formula C 20 H 32. They are biosynthesized by plants, animals and fungi via the HMG-CoA reductase pathway , with geranylgeranyl pyrophosphate being a primary intermediate.
Terpenes are classified by the number of carbons: monoterpenes (C 10), sesquiterpenes (C 15), diterpenes (C 20), as examples. The terpene alpha-pinene is a major component of the common solvent, turpentine. The one terpene that has major applications is natural rubber (i.e., polyisoprene).
A new study from Purdue University found that while wax melts may appear to be healthier than burning a scented candle, the terpenes released result in “significant” indoor particle pollution.
Monoterpenes are a class of terpenes that consist of two isoprene units and have the molecular formula C 10 H 16. Monoterpenes may be linear (acyclic) or contain rings (monocyclic and bicyclic). Modified terpenes, such as those containing oxygen functionality or missing a methyl group, are called monoterpenoids. Monoterpenes and monoterpenoids ...
Sesquiterpenes are a class of terpenes that consist of three isoprene units and often have the molecular formula C 15 H 24. Like monoterpenes, sesquiterpenes may be cyclic or contain rings, including many combinations. Biochemical modifications such as oxidation or rearrangement produce the related sesquiterpenoids. [1]
Terpenoids are modified terpenes, [7] wherein methyl groups have been moved or removed, or oxygen atoms added. Some authors use the term "terpene" more broadly, to include the terpenoids. Just like terpenes, the terpenoids can be classified according to the number of isoprene units that comprise the parent terpene:
Thujone (/ ˈ θ uː dʒ oʊ n / ⓘ [2]) is a ketone and a monoterpene that occurs predominantly in two diastereomeric forms: (−)-α-thujone and (+)-β-thujone. [3] [4]Though it is best known as a chemical compound in the spirit absinthe, it is only present in trace amounts and is unlikely to be responsible for the spirit's purported stimulant and psychoactive effects.
A terpene is a naturally occurring hydrocarbon based on combinations of the isoprene unit. Terpenoids are compounds related to terpenes, which may include some oxygen functionality or some rearrangement, however the two terms are often used interchangeably.
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