Showing papers on "Triterpene published in 1968"
TL;DR: The cinnamic acid ester of α- andβ-amyrins along with taraxerol, α-spinasterol, quercitol and β- d -glucoside of β-sitosterol have been isolated from the roots of the mesocarp.
18 citations
TL;DR: Extraction of the peridium of Scleroderma Aurantium yields a new dihydroxy tetracyclic triterpene of the lanostane series-23ξ-hydroxylanosterol(I) as discussed by the authors.
15 citations
TL;DR: In this article, Lanosterol-14C was administered to the leaves of two Euphorbia peplus plants and radioactive sterol was isolated by extraction, saponification and chromatography.
14 citations
11 citations
TL;DR: The structure and stereochemistry at ring A of alphitolic acid was confirmed by a partial synthesis of methyl dihydroalphitolate from betulic acid, which was obtained from Eurya acuminata as mentioned in this paper.
Abstract: Seven pentacyclic triterpenes were isolated from Dryobalanops aromatica, of which two were artifacts. The structure and stereochemistry at ring A of alphitolic acid was confirmed by a partial synthesis of methyl dihydroalphitolate from betulic acid, which was obtained from Eurya acuminata.
9 citations
TL;DR: The tree trichilia heudelottii gave a series of esters of an oxidised triterpene alcohol with formic, acetic, and 2-methylbutyric acids and with unidentified hydroxy-acids as mentioned in this paper.
Abstract: Extraction of the timber of Trichilia heudelottii gave a series of esters of an oxidised triterpene alcohol with formic, acetic, and 2-methylbutyric acids and with unidentified hydroxy-acids. These are referred to as heudelottins. The parent alcohol has been assigned the structure 14β, 15β-epoxy-7α,11 β,12α-trihydroxy-3-oxomeliac-1-ene. The name is based on the furyl cyclopentanophenanthrene meliacan, which is the parent of a number of limonoid triterpenes.
9 citations
TL;DR: Apetalactone, a triterpene lactone isolated from Calophyllum apetalum Willd and C. tomentosum T. Anders, has been shown to be 4,28-dihydroxy-3,4-secofriedelan-3-oic acid lactone (IIa) as discussed by the authors.
Abstract: Apetalactone, a new triterpene lactone isolated from Calophyllum apetalum Willd. and C. tomentosum T. Anders., has been shown to be 4,28-dihydroxy-3,4-secofriedelan-3-oic acid lactone (IIa).
7 citations
TL;DR: The distribution of non-glycosidal sterols, triterpene alcohols, and triterpenic acids in 211 commercial crude drugs was examined by means of gas chromatography.
Abstract: The distribution of non-glycosidal sterols, triterpene alcohols, and triterpenic acids in 211 commercial crude drugs was examined by means of gas chromatography.
5 citations
5 citations
4 citations
TL;DR: The structure of leontoside E has been established as a hexaoside of hederagenin this article, and its O-glycosidic moiety is branched and consists of O-β-D-glucopyranosido(1.
Abstract: ConclusionsThe structure of leontoside E has been established as a hexaoside of hederagenin. Its O-glycosidic moiety is branched and consists of O-β-D-glucopyranosido(1 » 4)-O-β-D-glucopyranosido(1 » 3)-O-α-L-arabopyranose and its O-acyl glycosidic moiety is O-α-L-rhamnopyranosido(1 » 4)-O-β-D-glucopyranosido(1 » 6)-O-β-D-glucopyranose.
TL;DR: In this article, the monosaccharide composition and the approximate quantitative ratio of the sugars in the carbohydrate moiety of each leontoside have been established from the tubers of Leontice eversmannii bge.
Abstract: Triterpene glycosides, which we have called leontosides A, B, C, D, and E, have been isolated from the tubers ofLeontice eversmannii Bge. The monosaccharide composition and the approximate quantitative ratio of the sugars in the carbohydrate moiety of each leontoside have been established. In leontosides A, B, and C, the carbohydrate moiety is bound only to the alcoholic group of hederagenin, while in leontosides D and E there is also an O-acyl glycosidic bond to the carboxy group.
TL;DR: In this paper, the acyl α-D-glucopyranoside, the α-d-xylopyranoide, α-n-α-arabinopyranodes, and α-β-Dlactoside of 18β-glycyrrhetic acid have been synthesized.
Abstract: SummaryThe acyl α-D-glucopyranoside, the acyl α-D-xylopyranoside, the acyl D- and L-α-arabinopyranosides, and the acyl β-D-lactoside of 18β-glycyrrhetic acid, and also the acyl β-D-lactoside of 18α-glycyrrhetic acid have been synthesized. The acid and alkaline hydrolysis of the compounds obtained has been studied.
TL;DR: The structure of leontoside D-a hederagenin pentaoside has been established as mentioned in this paper, and the O-glycosidic and O-acyl moieties were established.
Abstract: ConclusionsThe structure of leontoside D-a hederagenin pentaoside-has been established. The O-glycosidic moiety of leontoside D is O-β-D-glucopyranosido-(1 → 4)-O-α-L-arabopyranose, and the O-acyl moiety is O-α-L-rhamnopyranosido-(1 → 4)-O-β-D-glucopyranosido-(1 → 6)-O-β-D-glucopyranose.