Showing papers on "Triterpene published in 1972"
TL;DR: Sterol esters as well triterpene monol and diol esters isolated from the flowers of Calendula officinalis contain as alcohol components all the types of sterols and triterpenic alcohols present in this plant as mentioned in this paper.
24 citations
8 citations
TL;DR: Study of the rates of incorporation of 14 CO 2 into triterpenoids in young shoots of sunflower revealed that the synthesis of five pentacyclic triterpene monols is followed by their hydroxylation to the corresponding diols as well as hydroxyation of oleanolic acid, formed by partial oxidation of β-amyrin to echinocystic acid.
6 citations
TL;DR: It has been shown that germinating seeds of Calendula officinalis possess the ability to synthetize triterpene compounds of the oleanane, ursane and lupane groups as discussed by the authors.
4 citations
TL;DR: In this article, the roots of Chenopodium ambrosioides were collected in 1969 in the Moscow oblast and the combined saponins isolated by the extraction of the roots with methanol and subsequent twice-repeated reprecipitation in acetone consisted, according to thin-layer chromatography, of two glycosides which were called in order of increasing polarity chenopodiosides A and B.
Abstract: We have investigated the roots of Chenopodium ambrosioides L., collected in 1969 in the Moscow oblast [Introduction Laboratory of the All-Union Scientific-Research Institute for Medicinal Plants (VILR)]. The combined saponins isolated by the extraction of the roots with methanol and subsequent twice-repeated reprecipitation in acetone consisted, according to thin-layer chromatography, of two glycosides which we have called in order of increasing polarity chenopodiosides A and B. When the combined tr i terpene glycosides were chromatographed on a column of KSK silica gel, chenopodioside B was isolated, with the composition C52H82022 , m p 213-216°C [~]~-50 ° (c 0.5; ethanol), tool. wt, 1071 (spectrophotometrically) [1]. The complete acid hydrolysis of chenopodioside B gave us echinocystic acid with mp 304-306°C (methanol), [~]~+47.6 ° (c 0.3; ethanol). Literature data: mp 305-306°C, [~]~+33 ° (c 1.5; chloroform) [2].
4 citations
TL;DR: The purpose of this short account is to present some results which cast doubt on the validity of the methods used generally for the study of phytosterol biosynthesis (though not necessarily on the legitimacy of the conclusions arrived at).
Abstract: The purpose of this short account is to present some results which cast doubt on the validity of the methods used generally for the study of phytosterol biosynthesis (though not necessarily on the validity of the conclusions arrived at). We shall accept, and not discuss, the present general framework of interpretation of sterol biosynthesis (chart 1) (see for example Goad 1970). Key intermediates, from our point of view, are squalene, squalene epoxide, and a triterpene alcohol: lanosterol in vertebrates and in fungi, cycloartenol in the green plants. The transformation squalene-squalene epoxide is an oxidative step; the transformation squalene epoxidetriterpene alcohol is the biochemical equivalent of an acidcatalysed isomerization.
3 citations
22 Mar 1972
3 citations
Journal Article•
3 citations
2 citations
1 citations
TL;DR: It has been established that calthoside D is hederagenin 3-[O-β-D-glucopyranosyl-(1→2)-α-L-arabopyranoide] and is identical with caulosaponin B as discussed by the authors.
Abstract: It has been established that calthoside D is hederagenin 3-[O-β-D-glucopyranosyl-(1→2)-α-L-arabopyranoside] and is identical with caulosaponin B.
TL;DR: The structure of a ribose-containing triterpene glycoside consisting of a hederagenin pentaoside has been established as discussed by the authors, where the structure of the hederganin is described in detail.
Abstract: The structure of a ribose-containing triterpene glycoside consisting of a hederagenin pentaoside has been established.
TL;DR: A method for the qualitative and quantitative characterization of the monosaccharides found in triterpene glycosides has been developed.
Abstract: A method for the qualitative and quantitative characterization of the monosaccharides found in triterpene glycosides has been developed.
TL;DR: In this article, five tetracyclic triterpene glycosides (Cucurbitacides) were found in cucumber seeds, and they were found to be carcinogenic.
Abstract: Five tetracyclic triterpene glycosides — cucurbitacides — have been found in cucumber seeds.