Showing papers on "Triterpene published in 1971"
TL;DR: The structure and stereochemistry of Lantanolic acid have been established by chemical and physical methods as discussed by the authors, which is a triterpene derived from Lantana camara.
28 citations
TL;DR: The acidic fraction of the alcoholic extract of the leaf of P. roxburghii Wall yielded a new triterpene acid, roXburghonic acid, which has been shown by physico-chemical methods to be 3-keto-friedelan-25-oic acid.
24 citations
22 citations
22 citations
TL;DR: The triterpene fraction ( ∼ 80%) of the oleoresin from Dipterocarpus pilosus has been found to contain dipterocarolic acid and several known triterpenes related to this as mentioned in this paper.
21 citations
TL;DR: Five closely related triterpene acetates have been obtained from Lactuca denticulata and isolated together with the isolation of other triterpenoids and steroids from also L. indica, Ageratum conyzoides and A. houstonianum.
20 citations
TL;DR: Suriana maritima L, often classified in Simaroubaceae, but regarded also as the monotypic member of Surianaceae, is devoid of the terpenoid lactones that characterize Simaraebaceae as mentioned in this paper.
20 citations
TL;DR: In this paper, Evalonic acid-2-14 C was administered to banana peel slices for time periods varying from 0·5 hr to 6 days, and for each period the incorporation of label into squalene, triterpene esters, 4,4-dimethyl, 4α-methyl and 4-desmethyl sterols was determined.
19 citations
TL;DR: Litsomentol, a new tetracyclic triterpene isolated from Litsea tomentosa, has been shown to have strocture Ia by degradation and correlation with agnosterol.
19 citations
TL;DR: Evidence for the structure of a new triterpene from Maytenus senegalensis, named maytenonic acid, is presented and was postulated mainly on the basis of interpretation of IR, NMR, and mass spectral data.
13 citations
TL;DR: Saturated fatty acids from C12 to C30 were detected in the sterol and triterpene ester fraction by GLC, with palmitic acid (25%) stearic acids (20%) predominating as the fatty acid moieties.
TL;DR: An alternative procedure for converting the typical 3-hydroxy-4,4-dimethyl-substituted triterpene A-ring to a steroidal 3-oxo-4-ene system has been outlined in this article.
Abstract: An alternative procedure for converting the typical 3-hydroxy-4,4-dimethyl-substituted triterpene A-ring to a steroidal 3-oxo-4-ene system has been outlined. Application of the new method to 3β-hyd...
Abstract: An examination of the pentacyclic triterpenes of Polypodium vulgare Linn. has shown the presence of 21-epifern-9-ene, fern-7-ene, hopene-1, and an as yet unidentified triterpene hydrocarbon, in addition to the previously reported constituents. The biosynthesis of fern-9-ene was shown to involve a direct proton-catalysed cyclisation of squalene, rather than a cyclisation–reduction process based on 2,3-epoxysqualene.
TL;DR: In this paper, chemical and spectral evidence for the 1β,3β-dihydroxyolean-18-ene structure of anagadiol (I), a new triterpene isolated from the aerial parts of Salvia Broussonetii Benth, was presented.
Abstract: Chemical and spectral evidence for the 1β,3β-dihydroxyolean-18-ene structure of anagadiol (I), a new triterpene isolated from the aerial parts of Salvia Broussonetii Benth., are reported.
TL;DR: Isocycloartenol has been shown to be 9:19-cyclolanost-25-en-3β-ol(I), which is a new triterpene from the stem-bark of Artocarpus chaplasha lupeol acetate.
TL;DR: Investigation of chemical components of callus and other tissues of pumpkin found squalene, 3 sterols, a triterpene, a fatty alcohol and hydroquinone, the last two being specifically found in the callus, but stigmastadienol and chlorophyll could not be identified.
TL;DR: In this article, the isolation and identification of friedelin, lignoceryl alcohol, ferulic acid and maslinic acid have been described, as well as an unusual 2α, 3β dihydroxy triterpene.
TL;DR: The complete structures of eleutherosides I, K, L, and M have been established as discussed by the authors, and it has been shown that eleutheroside K is the 3]-O-α-L-rhamnopyranosyl-(1»2)-α-l-arabopyranoiside] of oleanolic acid.
Abstract: The complete structures of eleutherosides I, K, L, and M have been established. Glycoside I is identical with mubenin B and glycoside M with hederasaponin B. It has been shown that eleutheroside K is the 3-[O-α-L-rhamnopyranosyl-(1»2)-α-L-arabopyranoside] of oleanolic acid. In eleutheroside L, the L-rhamnose and L-arabinose residues are connected by a 1»4 bond, and a trisaccharide consisting of O-α-L-rhamnopyranosyl-(1»4)-O-β-D-glucopyranosyl-(1»6)-β-D-glucopyranose is connected with the carboxy group.
TL;DR: In this article, the pentacyclic triterpene β-amyrin was synthesized in a ten-step route from 2,5,5-trimethylcyclohexane-1,3-dione.
Abstract: 3,4,4a,5,6,7,8,8aβ-Octahydro-2,4aβ,7,7-tetramethylnaphthyl-1-methanol, a useful intermediate for further elaboration into the pentacyclic triterpene β-amyrin, has been synthesized in a ten-step route from 2,5,5-trimethylcyclohexane-1,3-dione.
TL;DR: A triterpenoid dimethyl ester Iµ-lactone (compound B) isolated from dammar resin has been shown by X-ray crystallographic examination to be 23-hydroxy-2,3-secours-12-ene- 2,3,28-trioic acid (2 → 23)-lactic acid (I).
Abstract: A triterpenoid dimethyl ester Iµ-lactone (‘compound B’) isolated from dammar resin has been shown by X-ray crystallographic examination to be 23-hydroxy-2,3-secours-12-ene-2,3,28-trioic acid (2 → 23)-lactone 3,28-di-methyl ester (I). The crystals are triclinic, space group P1, with a= 7·01, b= 9·16, c= 11·72 A, α= 90·62, β= 92·03, γ= 100·42°, and Z= 1. The crystal structure was solved by numerical non-centrosymmetric direct methods involving the systematic examination of 32 alternative phase sets. The lactone is probably formed biogenetically by the oxidation of asiatic acid (II).
TL;DR: Leuconol, previously reported as a new triterpene alcohol obtained from the leaves of L. eugenifolia, has been shown to be a mixture consisting mainly of bauerenol, α- and β-amyrin this article.
TL;DR: The stems of Glochidion macrophyllum Benth (Euphorbiaceae) have been found to contain a new triterpene, shown to be lup-20(29)-ene-3α,23-diol on the basis of chemical and spectroscopic evidence as discussed by the authors.
Abstract: The stems of Glochidion macrophyllum Benth. (Euphorbiaceae) have been found to contain a new triterpene, shown to be lup-20(29)-ene-3α,23-diol on the basis of chemical and spectroscopic evidence.
TL;DR: The structure of trichoside A, a trioside from gypsophylla trichotoma Wend, has been established as discussed by the authors, and the O-glycosidic moiety is the Oβ-D-glucopyranosyl-(1 → 3)-O-β-d-glocopyraniumide grouping.
Abstract: The structure of trichoside A — a gypsogenin trioside fromGypsophylla trichotoma Wend. — has been established. The O-glycosidic moiety is the O-β-D-glucopyranosyl-(1 → 3)-O-β-D-glucopyranoside grouping and the O-acyl moiety is D-galactose.
TL;DR: It has been shown that the roots of vitalba contain free hederagenin and oleanolic acid and also eight glycosides of these aglycones as mentioned in this paper.
Abstract: 1. It has been shown that the roots ofClematis vitalba contain free hederagenin and oleanolic acid and also eight glycosides of these aglycones. 2. It has been established that vitalbosides F, G, and H contain in their carbohydrate moiety an unusual monosaccharide for saponins — ribose.
TL;DR: Litsomentol, a new tetracyclic triterpene, has been proved to have the cucurbitacin-type structure (I) by degradation and correlation with agnosterol.
Abstract: Litsomentol, a new tetracyclic triterpene, has been proved to have the cucurbitacin-type structure (I) by degradation and correlation with agnosterol.
TL;DR: From the leaves of Eleutherococcus senticosus four glycosides of oleanolic acid have been isolated, and they have been called eleutherosides I, K, L, and M as discussed by the authors, and differ from I and K, respectively, by the fact that they contain a trisaccharide consisting of D-glucose and L-rhamnose attached by an O-acylglycosidic bond to the carboxy group.
Abstract: From the leaves ofEleutherococcus senticosus four glycosides of oleanolic acid have been isolated, and they have been called eleutherosides I, K, L, and M Eleutherosides I and K are biosides whose carbohydrate chains consist of L-arabinose and L-rhamnose residues Eleutherosides L and M are pentaosides and differ from I and K, respectively, by the fact that they contain a trisaccharide consisting of D-glucose and L-rhamnose attached by an O-acylglycosidic bond to the carboxy group The absence of branching and of 1,3 bonds in the carbohydrate chains of the eleutherosides has been shown
TL;DR: The structure of dianthoside C, a triterpene glycoside from Dianthus deltoides L, has been established in this article, and the structure of Dianthus Deltoides C is described in detail.
Abstract: The structure of dianthoside C — a triterpene glycoside fromDianthus deltoides L. — has been established.
TL;DR: Pastuchoside B has been isolated and shown to be O-α-D-glucopyranosyl-(1 → 3)-hederagenin this article, which is the most similar to ours.
Abstract: Pastuchoside B has been isolated and shown to be O-α-D-glycopyranosyl-(1 → 4)-O-α-D-glucopyranosyl-(1 → 3)-hederagenin.
TL;DR: The structure of trichoside C, a gypsogenin pentaoside from Gypsophilla trichotoma, has been established as discussed by the authors, and the glycosidic carbohydrate chain forms the O-β-D-glucopyranosyl-(1→3)-O-β-,D-gucuronopyranoopyranside, and the acyloside chain formed the O -β,D-galactopyranthusyl-( 1→4)-O -α-L-rhamnopyr
Abstract: The structure of trichoside C — a gypsogenin pentaoside fromGypsophilla trichotoma — has been established. The glycosidic carbohydrate chain forms the O-β-D-glucopyranosyl-(1→3)-O-β-D-glucuronopyranoside, and the acyloside chain forms the O-β-D-galactopyranosyl-(1→4)-O-α-L-rhamnopyranosyl-(1→4)-O-β-D-fucopyranoside.