Showing papers on "Triterpene published in 1974"
TL;DR: The unsaponifiables from threeTheaceae oils and alfalfa, garden balsam, and spinach seed oils and shea fat were separated into four fractions: sterols, 4-methylsterols, triterpene alcohols, and less polar compounds by thin layer chromatography.
Abstract: The unsaponifiables from threeTheaceae (Camellia japonica L.,Camellia Sasanqua Thunb., andThea sinensis L.) oils and alfalfa, garden balsam, and spinach seed oils and shea fat were separated into four fractions: sterols, 4-methylsterols, triterpene alcohols, and less polar compounds by thin layer chromatography. While the sterol fraction was the major one for the unsaponifiables from alfalfa and spinach seed oils, the triterpene alcohol fraction was predominant for the unsaponifiables from all other oils. The sterol, 4-methylsterol, and triterpene alcohol fractions were analyzed by gas chromatography. All the sterol fractions were alike in their compositions, consisting exclusively of Δ7-sterols, such as α-spinasterol and Δ7-stigmastenol as predominant components together with Δ7-avenasterol and 24-methylcholest-7-enol. Obtusifoliol, gramisterol (occasionally accompanied with cycloeucalenol), and citrostadienol, together with several other unidentified components, were found in the 4-methylsterol fractions from all of the oils except shea fat. The 4-methylsterol fraction from shea fat showed a characteristic composition containing a large proportion of unidentified components which had relative retention time greater than that of citrostadienol, while no citrostadienol was detected. β-Amyrin, lupeol, and butyospermol were major components of the triterpene alcohol fractions from most of the oils, but the fraction from spinach seed oil contained cycloartenol and 24-methylene-cycloartanol as predominant components. There is a close similarity in the compositions of unsaponifiables (sterols, 4-methylsterols, and triterpene alcohols) of the threeTheaceae oils. Two sterols, α-spinasterol and Δ7-stigmastenol, and five triterpene alcohols were isolated from tea seed oil. Moreover, five unidentified components beside parkeol, butyrospermol, α-amyrin, and lupeol were isolated from the triterpene alcohol fraction of shea fat.
110 citations
TL;DR: From the pericarps of the capsules of Euscaphis japonica PAX.
Abstract: From the pericarps of the capsules of Euscaphis japonica PAX., oleanolic, pomolic, tormentic acids and a new triterpene acid, named euscaphic acid were isolated and the structure of euscaphic acid was elucidated to be 2α, 3α, 19α-trihydroxyurs-12-en-28-oic acid by chemical and spectral evidences.
43 citations
TL;DR: The leaves of Prunus serotina and P. lusitanica contain a triterpene, 2α,3α-dihydroxyurs-12-en-28-oic acid, isolated in form of its methyl ester as mentioned in this paper.
25 citations
TL;DR: The saponin from the berries of Phytolacca americana yielded one known and two new aglycones, desmethylphytolaccagenin 2 and 3β, 23-dihydroxyolean-12-ene-28, 30-dioic acid-30-methyl ester 3.
17 citations
17 citations
TL;DR: Melissa off. L. contains as further triterpenes pomolic acid, three 2-hydrox- and one 29-hydroxytriterpenic acid as discussed by the authors.
Abstract: Melissa off. L. enthalt als weitere Triterpene: Pomolsaure, drei 2-Hydroxy- und eine 20-Hydroxytiterpensaure. In der Wurzel kommen Betulinsaure, Betulin und drei 2-Hydroxytriterpensauren vor. Die Konfiguration der 2,3-Dihydroxytriterpensauren wird durch Synthese der vier isomeren 2-Hydroxyderivate von Oleanolsaure, Ursolsaure und α-Amyrin bewiesen.
Further Triterpenes from Melissa officinalis L.
Melissa off. contains as further triterpenes pomolic acid, three 2-hydroxy- and one 29-hydroxytriterpenic acid. The root contains betulinic acid, betulin and three 2-hydroxytriterpenic acids. The configuration of the 2,3-dihydroxytriterpenic acids was proved by synthesis of the four isomeric 2-hydroxy-derivatives of oleanolic acid, ursolic acid and α-amyrin.
15 citations
TL;DR: Oleanolic acid was found to be the major triterpene acid of fresh olive husks and after storage of the husks or after incubation under humid conditions maslinic acid was formed with a corresponding reduction in the amount of oleanolic acids as mentioned in this paper.
13 citations
11 citations
10 citations
5 citations
TL;DR: Extraction of the roots of Faradaya splendida F Muell, has yielded 3-O-acetyloleanolic aldehyde, 3 O-acetylerythrodiol and a very small amount of the potassium salt of a new polyhydroxy triterpene diacid, C30H46O11, named faradoic acid as mentioned in this paper.
Abstract: Extraction of the roots of Faradaya splendida F Muell, has yielded 3-O-acetyloleanolic aldehyde, 3-O-acetylerythrodiol and a very small amount of the potassium salt of a new polyhydroxy triterpene diacid, C30H46O11, named faradoic acid
TL;DR: From the leaves and stems of Euphorbia nerifolia Linn, a new triterpene was isolated besides friedelan-3α- andβ-ols, and taraxerol.
TL;DR: The structure of the triterpene glycoside fromGypsophilla acutifolis Fisch has been established in this article, and the structure of a triethylamine glycosid from the same species is known.
Abstract: The structure of the triterpene glycoside fromGypsophilla acutifolis Fisch. has been established.
TL;DR: In this article, the authors used mevalonic acid doubly labelled with 14 C in position 2 and 3 H in positions 2R, 2S, 4R or 5R,S and the [ 3 H/ 14 C] ratios determined in squalene and pentacylic mono-and dihydroxy-triterpene alcohols and also in some derivatives prepared from the triterpene derivatives.
TL;DR: The structure of philoside B — a gypsogenin nonaoside isolated from the roots of Gypsophila patrinii — has been established and it is shown that this compound acts as a “spatially aggregating agent” to spruce.
Abstract: The structure of philoside B — a gypsogenin nonaoside isolated from the roots ofGypsophila patrinii — has been established.