triterpene

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triterpene

[trī′tər‚pēn]
(organic chemistry)
One of a class of compounds having molecular skeletons containing 30 carbon atoms, and theoretically composed of six isoprene units; numerous and widely distributed in nature, occurring principally in plant resins and sap; an example is ambrein.
References in periodicals archive ?
In our study, lupeol, a common triterpene of higher plants, was the major compound identified in the R.
XXXII.1 Pentacyclic Triterpenes. J Am Chem Soc 85: 3688-3699.
Andrade Filho et al., (2010) identified the presence of hydrolysable tannins, saponins, reducing sugars and triterpenes and the way they affect the development and mortality of Bemisia tuberculata Bondar (Hemiptera: Aleyrodidae).
Compound 1 was isolated as a colorless solid, which gave positive Liebermann-Burchard test for triterpene. The IR spectrum showed key absorption bands at 1741 and 1210 cm-1 for ester functionality, while at 1660, 810 cm-1 for individual olefinic moiety.
The results were confirmed by means of spectrophotometers analysis at the UV-visible region, were the maximum absorption band is 230 nm ([lambda]max.MeOH) corresponds to triterpenes, the bands in 280 and 330 nm (Xmax.MeOH) are for phenolic compounds and flavonoids, the band in 280 nm corresponds to the A ring absorption (hemiacetal) and the band in 370 nm represents the flavonoids B ring (Figure 2).
The chemical study of the Senna cana and Senna pendula ethanol extracts revealed the presence of anthraquinones, flavonoids, tannins, triterpenes, and xanthones, while hexane extracts presented positive results for anthraquinones and triterpenes.
Kuo, "Cytotoxic triterpenes from the aerial roots of Ficus microcarpa," Phytochemistry, vol.
Alkaloids, triterperne, sterols, heterosides, and triterpenes are present only in the hydroalcoholic extract.
Phytochemical study of the plant was visualized affording a broad range of diverse compounds, bearing mostly a rich abundance of carotenoids, fatty alcohol chains (e.g., 1-hexacosanol (1)), triterpenes (3[beta]-hydroxy-24-methylene-9,19-cyclolanostane (2) and 3[beta]-hydroxy-9,19-cyclolanostane (3)), sterols (3[beta],24S-Ergost-5-en-ol (4)), and essential fatty acids (EFAs) (e.g., linoleic acid, an omega 6 fatty acid).
In this work, the GC-MS analysis of the propolis extracts showed that major compounds of propolis from Cundinamarca were rich in diterpenic acids; while that of the propolis from Antioquia and Huila regions, were rich in prenylated benzophenones and triterpenes respectively (Table 1).
Although statistical tests revealed significant differences for mean concentration in QTTs and Glu-BA, some extreme values of individual triterpenes were very close for sessile and pedunculate oak (see "Mean, Minimal and Maximum Values Observed in Sessile and Pedunculate Oak").