共查询到20条相似文献,搜索用时 15 毫秒
1.
Ferdinand Bohlmann Christa Zdero Robert M. King Harold Robinson 《Phytochemistry》1982,21(9):2329-2333
From the aerial parts of Wedelia hookeriana eight new eudesmanolides, all derivatives of ivangustin, and a new ent-kaurenic acid derivative togethe 相似文献
2.
Georges Massiot Anne-Marie Morfaux Louisette Le Men-Olivier James Bouquant Abdelaziz Madaci Abdallah Mahamoud Mariette Chopova Paul Aclinou 《Phytochemistry》1985,25(1):258-261
Six guaianolides have been isolated from the aerial parts of Centaurea incana from Algeria. They were identified as desoxyrepin, repin or subluteolide, repin monochlorhydrin, acroptilin, janerin and repdiolide triol. 相似文献
3.
Ferdinand Bohlmann Jasmin Jakupovic Angelika Schuster Robert M. King Harold Robinson 《Phytochemistry》1982,21(9):2317-2327
The reinvestigation of Ichthyothere terminalis afforded, in addition to known compounds, two new melampolides, a hydroxy borneol, a pinene derivati 相似文献
4.
Herbert Budzikiewicz Gabriela Laufenberg Curtis Clark Peter Proksch 《Phytochemistry》1984,23(11):2625-2627
From the composite Enceliopsis argophylla several new benzofuran derivatives were isolated. The unusual structure of the skeleton comprises an isopropylidene group at C-2 and a keto function at C-3 of the furan ring. An organ specific analysis by HPLC showed the compounds being present in leaves, peduncles, bracts, ray and disc flowers. The absolute amounts, however, differed greatly being highest in leaves and bracts. 相似文献
5.
Aderbal F. Magalhães Eva G. Magalhães Hermógenes F. Leitão Filho Rosa T.S. Frighetto Simone M.G. Barros 《Phytochemistry》1981,20(6):1369-1371
Analysis of the petrol-diethyl ether extracts of Pterocaulon balansae and P. lanatum aerial parts afforded, besides puberulin, scopoletin-[2′ 相似文献
6.
From the aerial parts of Artemisia alba of Calabrian origin, five oxygenated nerolidol derivatives were isolated, two of them bearing hydroperoxyl groups. Structures were elucidated by spectral data and chemical reactions. Acetylation of the major hydroperoxyl constituent afforded a tris-nor aldehydic derivative as a result of loss of acetone from an unstable intermediate perester. An internally consistent set of 13C NMR assignments for the natural products and some derivatives is presented. 相似文献
7.
Two new diterpenes, 3α-angeloyloxy-18-hydroxy-13-furyl-ent-labda-8(17)-ene and 3α-hydroxy-18-angeloyloxy- 13-furyl-ent-labda-8(17)-ene and an only recently reported third diterpene, 3α, 18-dihydroxy-13-furyl-ent-labda-8(17)-ene, were isolated from the leaves of Gutierrezia grandis. Their structures were determined by mass spectral, IR, 1H NMR and 13C NMR data was well as chemical evidence. 相似文献
8.
Umesh C. Pandey Ram P. Sharma Palaniappan Kulanthaivel Werner Herz 《Phytochemistry》1985,24(7):1509-1514
The germacranolides tagitinin A and tirotundin ethyl ether and a series of new ring A-hydroxylated isoalantolactone derivatives were isolated from Blumea densiflora. Structures were established by spectroscopic methods and chemical transformations. 相似文献
9.
Ferdinand Bohlmann Jasmin Jakupovic Angelica Schuster Robert M. King Harold Robinson 《Phytochemistry》1984,23(7):1445-1448
The aerial parts of Flourensia macrophylla afforded, in addition to compounds similar to those from other Flourensia species, four new eudesman 相似文献
10.
The chemical investigation of Chrysothamnus viscidiflorus afforded, in addition to known bisabolene derivatives, elemicin and p-hydroxyacetophenone, two new diterpene acids. Their structures were determined, by spectroscopic methods and some chemical transformations, as ent-labd-8(17),13E-dien-15-ol-18-oic acid (viscidic acid A) and ent-labd-8(17),13E-dien-15-acetoxy-18-oic acid (visidic acid B). 相似文献
11.
The aerial parts of Loxothysanus sinuatus afforded in addition to known compounds nine new pseudoguaianolides, three guaianolides and five carabrone derivatives. The structures were elucidated by spectroscopic methods. The chemotaxonomy is discussed briefly. The configurations of two guaianolides were corrected. 相似文献
12.
From the weakly acid fraction of the hexane extract from Artemisia campestris subsp. glutinosa, five new aromatics have been isolated. They hav 相似文献
13.
Ferdinand Bohlmann Naleen Borthakur Robert M. King Harold Robinson 《Phytochemistry》1982,21(1):125-127
A re-investigation of Chromolaena morii afforded seven further prostaglandin-like fatty acids. 相似文献
14.
From the aerial parts of Moscharia pinnatifida nine further α-isocedrene, two guaiane, three cyperene and two nerolidol derivatives were isolated. The structures were elucidated by high field NMR studies. Chemotaxonomic aspects are discussed. 相似文献
15.
Six tritium-labelled thiophene derivatives were synthesized and their emulsions were applied to whole plants of Tagetes patula. From the root extra 相似文献
16.
An unusual m-hydroxyacetophenone, named viscidone, and three new chroman-4-one derivatives were isolated from Chrysothamnus viscidiflorus ssp. lanceolatus, which also contained a known p-hydroxyacetophenone derivative. Their structures were determined by spectroscopic (1H and 13C NMR, UV, IR and MS) and chemical means. 相似文献
17.
Ferdinand Bohlmann Shanta Banerjee Jasmin Jakupovic Robert M. King Harold Robinson 《Phytochemistry》1985,24(6):1295-1297
The investigation of three Peruvian Coreopsis species afforded, in addition to compounds isolated previously from this genus, two new tetraynenes and five sesquiterpenes all related to perezone, including a tricyclic ketone with a cedrane skeleton closely related to pipitzol. The structure were elucidated by spectroscopic methods. 相似文献
18.
(?)-Kaur-16-en-19-oic acid and tetrachyrin, a new rearranged kaurenoid lactone, were isolated from Tetrachyron orizabaensis var. websteri and Helianthus debilis ssp. debilis. The latter species also afforded angeloylgrandifloric acid. 相似文献
19.
From Calendula officinalis leaves, five cellular subtractions (chloroplasts, mitochondria, Golgi membranes, microsomes and cytosol) were obtained and their purity was checked. The contents of α-,γ- and δ-tocopherols were determined in these fractions. There were no tocopherols in Golgi membranes and cytosol. γ-Tocopherol and δ-tocopherol were found in the chloroplasts, mitochondria and microsomes, whereas α-tocopherol was present only in the chloroplasts. 相似文献
20.
Fifteen acetylenic compounds have been isolated and characterized from the flower heads of Chrysanthemum leucanthemum L. Five of these acetylenes have not previously been published as naturally occurring compounds. These are: 1,7(c)-hexadecadien-10,12,14-triyne; 1,8(c)-heptadecadien-11,13,15-triyne; 4(c)-tridecen-7,9,11-triyn-l-ol; 1,8(t)-hexadecadien-10,12,14-triyn-(6·7)-oxirane; and [3(t),5(t)-tridecadien-7,9,11-triyn-l-yl]-3-methyl-2-butenoate. The first three compounds are interesting since they are important intermediates in previously postulated biogenetic pathways. Ten acetylenes have been identified from the roots of the same plant, all of these having different structures from those of the flower heads. One of the acetylenes, [3(t), 5(t)-tridecadien-7,9,11-triyn-l-yl]-3-methylbutyrate, from the roots has never been reported as a naturally occurring compound. 相似文献