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1.
Ph. D. Ty M. Lischewski H.V. Phiet A. Preiss T.V. Sung J. Schmidt G. Adam 《Phytochemistry》1984,23(12):2889-2891
Two new triterpenoid carboxylic acids have been isolated from leaves of Acanthopanax trifoliatus and their structures elucidated as 3α, 11α-dihydroxylup-20(29)-en-28-oic acid and 30α, 11α,23-trihydroxylup-20(29)-en-28-oic acid by physical data and chemical transformations. 相似文献
2.
M. Lischewski P.D. Ty L. Kutschabsky D. Pfeiffer H.V. Phiet A. Preiss T.V. Sung G. Adam 《Phytochemistry》1985,24(10):2355-2357
From Acanthopanax trifoliatus the new nor-triterpenes 24-nor-3α, 11α-dihydroxy-lup-20(29)-en-28-oic acid and 24-nor-11α-hydroxy-3-oxo-lup-20(29)-en-28-oic acid were isolated. Their structures were determined on the basis of spectroscopic data, X-ray analysis and chemical transformations. 相似文献
3.
A new natural triterpenoid, characterized as 3β-hydroxylup-20(29)-en-27-oic acid, has been isolated from the roots of Hyptis suaveolens in additi 相似文献
4.
A new lupane derivative isolated from Euonymus revolutus (Celastraceae) has been established to be 2α,3α-dihydroxy-lup-20(29)-en-28-oic acid on the basis of chemical interconversions and spectroscopic data. 相似文献
5.
Antonio G. González José Amaro Braulio M. Fraga Javier G. Luis José Fayos Aurea Perales Mercedes P. Méndez 《Phytochemistry》1984,23(9):2079-2080
Two new triterpenes, 3-oxo-20-hydroxy-lupan-28-oic and 3β,6β-dihydroxy-olean-18-en-28-oic acids, along with oleanonic, morolic and sumaresinolic acids have been isolated from Orthopterygium huancuy. The structure of the first new terpene was determined by single crystal X-ray analysis. 相似文献
6.
From the leaves of Enkianthus campanulatus were isolated three new triterpenes, 3-oxo-19,23,24-trihydroxyurs-12-en-28-oic acid, 3β,6β, 19,23-tetrahydroxyurs-12-en-28-oic acid and 3β,6β,23-trihydroxyurs-12-en-28-oic acid. 相似文献
7.
Betulinic acid (3β-hydroxy-lup-20(29)-en-28-oic acid) was obtained from in vitro cultures of Solanum aviculare in yields up to 3% of the dry weight. This is a further example of overproduction by cells cultured in vitro of a product not found in the original parent plant. 相似文献
8.
Acid hydrolysis of the saponins from the stem bark of Guaiacum officinale yielded the new sapogenin 3β,20η-dihydroxy-30-norolean-12-en-28-oic acid and the artifacts 3β-hydroxy-30-norolean-12,19-dien-28-oic acid and its methyl ester. Larreagenin, sitosterol and oleanolic acid were also isolated. 相似文献
9.
The triterpenes 3β-hydroxy-21β-E-cinnamoyloxyolean-12-en-20-oic acid, 3β,21β-dihydroxyolean-12-en-28-oic acid (machaerinic acid) and its lactone (3β-hydroxyolean-12-en-21β→28-lactone) were isolated from the fruits of Enterolobium contorstisiliquum. Methyl and ethyl esters of 3β,21β-dihydroxyolean-12-en-oic acid were isolated and characterized as artifacts. The structures of these triterpenes have been established by a study of their chemical and spectroscopic (IR, MS and NMR) data. 相似文献
10.
The new triterpene 3α,11α-dihydroxy-23-oxo-lup-20(29)-en-28-oic acid was isolated from Acanthopanax trifoliatus. Its structure has been determined on the basis of spectroscopic data and chemical transformations. 相似文献
11.
The structure of 3α,11α-dihydroxylup-20(29)-ene-23,28-dioic acid, a new triterpene isolated from Schefflera octophylla, has been determined by spectroscopic methods. 相似文献
12.
From the fruit of Rosa davidii Crep., eleven compounds were isolated and identified by spectral evidence, viz. 2α,3β,19β-trihydroxyl-olean-12-en-28-oic acid (1), 2α,3β-dihydroxyl-urs-28(13)-lactone (2), arjunic acid (3), euscaphic acid (4), 2α,3β-dihydroxyl-urs-12-en-28-oic acid (5), oleanolic acid (6), kaempferol (7), tiliroside (8), quercetin (9), daucosterol (10) and β-sitosterol (11). Among them, 1 and 2 were new compounds. 相似文献
13.
中越猕猴桃根化学成分研究 总被引:15,自引:0,他引:15
用溶剂提取和硅胶柱层析分离的方法 ,从中越猕猴桃 (Actinidiaindochinensis)的根部分分离得到 6个化合物 ,根据其理化性质和波谱分析 ,分别鉴定为 :2α,3α,2 4 三羟基 1 2 烯 2 8 齐墩果酸 (Ⅰ ) ,2α,3α 二羟基 1 2 烯 2 8 乌苏酸 (Ⅱ ) ,2α,3α ,1 9α 三羟基 1 2 烯 2 8 乌苏酸 (Ⅲ ) ,熊果酸 (Ⅳ ) ,β 谷甾醇 (Ⅴ ) ,和 β 胡萝卜甙(Ⅵ )。化合物Ⅰ、Ⅱ、Ⅲ、Ⅵ为首次从该植物中获得。其中化合物Ⅰ、Ⅱ为首次从该属植物获得。 相似文献
14.
Arjunolic acid and a new triterpene acid, myrianthic acid, were isolated from the rootwood of Myrianthus arboreus. The structures of the two compounds were elucidated by IR, 1H NMR and mass spectroscopy. 相似文献
15.
A new natural triterpenoid, 3β-hydroxylup-12-en-28-oic acid, has been isolated from the roots of Hyptis suaveolens in addition to α- and β-amyrin. 相似文献
16.
C. Betancor R. Freire A.G. Gonzalez J.A. Salazar C. Pascard T. Prange 《Phytochemistry》1980,19(9):1989-1993
The investigation of stems and leaves of Catha cassinoides afforded, in addition to sitosterol, β-amyrin, ursolic acid, lup-20(29)-en-3β,30-diol and friedelin, three new pentacyclic triterpenes: 30-hydroxyfriedelan-3-one, 29-hydroxyfriedelan-3-one and 3-oxo-friedelan-29-oic acid. The structures ofthese were determined by spectral studies and correlations, and were confirmed by X-ray analysis of 29-hydroxyfriedelan-3-one acetate. 相似文献
17.
Sebiferenic acid, isolated from the bark of Sapium sebiferum, has been characterized as 2α,3β-dihydroxytaraxer-14-en-28-oic acid on the basis of 1H NMR, 13C NMR and mass spectral evidence and chemical transformations. The structure of sebiferic acid has been revised. 相似文献
18.
Yohei Hashimoto Hiroyuki Ishizone Midori Moriyasu Kazuko Kawanishi Atsushi Kato Masaru Ogura 《Phytochemistry》1984,23(3):693-694
Two new triterpenes from the root of Periandra dulcis were found to be 3,25-dioxoolean-12(13)-en-30-oic acid and 3,25-dioxoolean-18(19)-en-30-oic acid. 相似文献
19.
The carbonyl compound, previously isolated from the stems of Mallotus paniculatus, has been proved to be 29-nor-21αH-hopane-3,22-dione. The light petrol extracts of both the leaves and stems of M. hookerianus have been found to contain friedelin, friedelan- 3β-ol and sitosterol, and the ethanol extract of the former two new triterpene acids, 3-oxours-12-ene-27,28-dioic and 3β,28-dihydroxyurs-12-en-27-oic acids. 相似文献
20.