共查询到20条相似文献,搜索用时 15 毫秒
1.
《Phytochemistry》1987,26(10):2753-2757
In addition to three known thymol esters and five known sesquiterpene lactones, two new germacrolides and a new diterpene diester were isolated from the dichloromethane extract of the aerial parts of Piptothrix sinaloae. Structures for the new compounds were elucidated by chemical transformations and spectral methods. The current taxonomic status of P. sinaloae is discussed on the basis of both morphological and secondary metabolite data. 相似文献
2.
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
3.
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
4.
Shuai Liu Hui Wang Wen-jian Zuo You-xing Zhao Xiao-na Li Wen-li Mei Hao-fu Dai 《Phytochemistry letters》2013,6(1):5-8
Phytochemical investigation of Aglaia odorata var. microphyllina led to the isolation of two new rocaglamide derivatives and three known ones. The structures of the two new compounds were elucidated as 8b-methoxy-desmethylrocaglamide (1) and 3′-hydroxy-8b-methoxy-rocaglamide (2) by spectroscopic techniques (IR, MS, 1D and 2D NMR) and comparing with published data. All the five compounds were evaluated for cytotoxic activity against K562 cell line by MTT method. The results indicated that the OH at 8b position was a decisive group for cytotoxic activity. 相似文献
5.
Ferdinand Bohlmann Nezhun Ates Jasmin Jakupovic Robert M. King Harold Robinson 《Phytochemistry》1982,21(11):2691-2697
Artemisia douglasiana afforded, in addition to known compounds, two new C14-acetylenes, five longipinene derivatives, three nerolidol derivatives, a lactone and a ketone with a new carbon skeleton and lavendulol-2-methylbutyrate. The structures were elucidated by spectroscopic methods and some chemical transformations. The configurations of several oxo longipinene-7, 9-di- and 7, 8, 9-triesters isolated previously were corrected. The biogenesis of the new lactones is discussed briefly. 相似文献
6.
The phytochemical study of the chloroform extract of the aerial parts of Inula bifrons (L.) L. led to the isolation of one new ent-kaurane diterpenes acid along with twelve known compounds (two ent-kaurane diterpenoids, an eudesmane acid, five sesquiterpene lactones, three triterpenoids and β-sitosterol). All known compounds are found for the first time in I. bifrons. Their structures were elucidated by using spectral methods (NMR, HRESIMS and IR). The distribution of these compounds in the genus Inula and their chemotaxonomic significance is discussed. 相似文献
7.
The investigation of additional Senecio species afforded five new bisabolene derivatives, two acetylenic compounds and two aromatic compounds, 相似文献
8.
Ferdinand Bohlmann Maniruddin Ahmed Jasmin Jakupovic Robert M. King Harold Robinson 《Phytochemistry》1982,21(3):691-694
An investigation of Brickellia diffusa afforded three new dehydronerolidol derivatives and five new labdane derivatives, all highly oxygenated. The structures were elucidated by spectroscopic methods and a few chemical transformations. The compounds isolated showed close relationships to those isolated from Brickellia sp. 相似文献
9.
Ferdinand Bohlmann Widayati Ang Carola Trinks Jasmin Jakupovic Siegfried Huneck 《Phytochemistry》1985,24(5):1009-1015
The aerial parts of Artemisia sieversiana afforded in addition to known compounds five new guaianolides and four dimeric guaianolides, three of them closely related to absinthin and one derived from estafiatin as a monomer. The structures were elucidated by extensive NMR studies, which allowed the assignment of the 14 chiral centres. Artemisia frigida afforded several known compounds and one new guaianolide, 8-desoxy-cumambrin B, the most likely precursor of many guaianolides. 相似文献
10.
Ferdinand Bohlmann Jürgen Ziesche Robert M. King Harold Robinson 《Phytochemistry》1981,20(7):1623-1630
The investigation of six Zinnia species afforded in addition to already known compounds two eudesmanolides, five guaianolides, three germacranolides, five elemanolides and a dihydroxygeranylgeraniol. The structures were elucidated by spectroscopic methods and some chemical transformations. The chemotaxonomic situation is discussed briefly. 相似文献
11.
Ji-Yul Kim Dae-Won Ki Yoon-Ju Lee Lee Su Ha E-Eum Woo In-Kyoung Lee Bong-Sik Yun 《Mycobiology》2021,49(4):434
In our ongoing search for new secondary metabolites from fungi, a basidiomycete fungus Irpex consors was selected for mycochemical investigation, and three new zwitterionic alkaloids (1-3) and five known compounds (4-8) were isolated from the culture broth (16 l) of I. consors. The culture filtrate was fractionated by a series of column chromatography including Diaion HP-20, silica gel, and Sephadex LH-20, Sep-Pak C18 cartridge, medium pressure liquid chromatography (MPLC), and high pressure liquid chromatography (HPLC) to yield eight compounds (1-8). The structures of the isolated compounds were elucidated by the interpretation of nuclear magnetic resonance (NMR) spectra and high-resolution mass spectrometry (HR-MS). Their antioxidant and antibacterial activities were examined. The zwitterionic structures of three new sesquiterpene alkaloids (1-3) were determined together with five known compounds identified as stereumamide E (4), stereumamide G (5), stereumamide H (6), stereumamide D (7), and sterostrein H (8). This is the first report of the zwitterionic alkaloids in the culture broth of I. consors. Three new zwitterionic alkaloids were named as consoramides A–C (1-3). 相似文献
12.
The investigation of seven Bolivian Senecio species afforded in addition to known compounds five new furanoeremophilanes, two C10-amides, a new isoeugenol ester and the isomer of pterophorin. The structures are elucidated mainly by spectroscopic methods. While most of the new compounds are closely related to those isolated before from Senecio species, four of them are unusual. Another is a new type of a furanoeremophilane; its biogenesis however, can be explained easily from known types. 相似文献
13.
Forty-seven secondary metabolites were isolated from Ajania salicifolia (Mattf.) Poljak, including eight sesquiterpenoids, two diterpenoids, three triterpenoids, four steroids, three flavonoids, five coumarins, five lignans, nine phenylpropanoids, five other phenolic compounds, and three acetylenes. Their chemotaxonomic significance within the genus Ajania (the tribe Anthemideae) of the family Asteraceae is discussed. 相似文献
14.
We have isolated from Cephalanthus spathelliferus (Rubiaceae) five compounds: umbelliferone, skimmin, 7,4′-dimethylkaempferol,7,4′-dimethylaromadendrin and its 5-glucoside. The latter two are new compounds. 相似文献
15.
In our continuing search for antimalarial leads from South African marine organisms we have examined the antiplasmodial organic extracts of the endemic marine red alga Plocamium cornutum (Turner) Harvey. Two new and three known halogenated monoterpenes were isolated and their structures determined by standard spectroscopic techniques. The 3,7-dimethyl-3,4-dichloro-octa-1,5,7-triene skeleton is common to all five compounds. Interestingly, compounds bearing the 7-dichloromethyl substituent showed significantly higher antiplasmodial activity toward a chloroquine sensitive strain of Plasmodium falciparum. 相似文献
16.
《Phytochemistry》1987,26(9):2603-2606
The aerial parts of Dittrichia graveolens afforded in addition to compounds isolated previously five new sesquiterpene lactones, two benzoic acid derivatives while D. viscosa gave two further derivatives of costic acid. The structures were elucidated by high field NMR spectroscopy. 相似文献
17.
The investigation of two further species from the tribe Mutisieae afforded in addition to known compounds three new sesquiterpene lactones and two further sesquiterpene esters, all closely related to compounds isolated before from other Trixis species. The isolation of these new substances from Trixis further establishes the chemotaxonomic situation in the subtribe Nassauviinae. From the Dinoseris species, among others, 1β-hydroxyalantolactone was isolated, indicating a relationship to the subtribe Gochnatiinae. 相似文献
18.
《Phytochemistry》1986,25(7):1755-1756
From the aerial parts of Stevia amambayensis in addition to known compounds three new sesquiterpene lactones, a grazielic acid derivative and two melampolides were isolated. The roots gave two new bisabolene derivatives. 相似文献
19.
Si‐Yu Wang Jun Xiang Xiao‐Jun Huang Xia Wei Qi Zhang Xian‐Hua Du Jin‐Shan Hu Yu‐Mei Wang Cui‐Xian Zhang 《化学与生物多样性》2020,17(6)
Phytochemical investigation of Sargassum fusiforme (Harv.) Setch. led to the discovery of fifteen secondary metabolites, including three sterols, three monoterpenes, five nitrogenous compounds, two fatty acids, and two others. Among them, two compounds are new, while the other thirteen compounds were isolated from S. fusiforme for the first time. The structures of the two new compounds were identified by NMR and HR‐ESI‐MS data analyses, and the absolute configurations were established by comparing the calculated and experimental ECD spectroscopic data. 相似文献
20.
Ferdinand Bohlmann Shanta Banerjee Jasmin Jakupovic Michael Grenz Laxmi N. Misra Guillermo Schmeda-Hirschmann Robert M. King Harold Robinson 《Phytochemistry》1985,24(3):511-515
The investigation of eight Baccharis species afforded, in addition to known compounds, five new clerodanes, three labdane derivatives and a nor-diterpene as well as one hydroperoxide derived from 4α-hydroxygermacra-1(10), 5-diene. The structures were elucidated by spectroscopic methods. The structures of esters isolated previously from B. cassinaefolia have to be revised. Chemotaxonomic aspects are discussed briefly. 相似文献