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(organic chemistry)
Any terpene with the formula C15H24; that is, 1½ times the terpene formula.



any of the hydrocarbons with the general formula C15H24 (trimers of isoprene) or oxygen derivatives of these hydrocarbons. The name “sesquiterpenes” indicates that the molecular weight of these compounds is 1.5 times greater than that of the monoterpenes (from the Latin sesqui, “one and one-half times”). Sesquiterpenes, like terpenes, occur in essential oils and balsams and account for the characteristic odors of plants.

References in periodicals archive ?
Viridiflorol (11), the only evaluated sesquiterpenoid, was less active than the triterpenoids 2-10 on its ability to control elastase activity of P.
The story of the sesquiterpenoid juvabiones will serve to illustrate this point.
Tricyclic sesquiterpenoid brasilamides A-D (1-4) have been isolated from cultures of the plant endophytic fungus Paraconiothyrium brasiliense.
Furthermore, viridiflorol, the most abundant sesquiterpenoid in the oil of North-central Nigerian grown V.
Sesquiterpenoid constituents were expressed as percentages from peak area normalization, assuming that the total injection was 100% of 10-100 [micro]g of essential oil.
Both [alpha]-santalol and sandalwood oil belonging to the sesquiterpenoid class of phytoconstituents, might act as insulin secretagogues on surviving ([beta]-cells of Islets of Langerhans to release more insulin to reduce the concentration of blood glucose.
The active fraction was identified as a sesquiterpenoid called as kessyl alcohol and its activity compared favorably to that of imipramine (Oshimaand Matsuoka 1995).
A variety of constituents are present in TC plant belonging to different classes such as alkaloids, diterpenoid lactones, glycosides, steroids, sesquiterpenoid.
Accumulation of sesquiterpenoid cyclohexenone derivatives induced by an arbuscular mycor-rhizal fungus in members of the Poaceae.
Several aromatic hydrocarbons, such as cadalene derived from sesquiterpenoids, and 1,2,5-TMNr and 1,2,5,6-TeMNr whose precursors were derived from higher plants, are indicative of general or more specific higher plant source [16, 17].