Abstract:
:The dichloromethane extract from leaves of Juniperus brevifolia, through chromatographic fractionations yield six compounds: 3beta-hydroxy-abieta-8,11,13-trien-7-one, 18-hydroxy-sandaracopimara-8(14),15-dien-7-one, sandaracopimara-8(14),15-dien-18-yl formate; and the first examples of sandaracopimaranes and abieta-8,11,13-triene diterpenoids with a large aliphatic chain on C-18, abieta-8,11,13-trien-18-yl hexadecanoate, 7-oxoabieta-8,11,13-trien-18-yl hexadecanoate, sandaracopimara-8(14),15-dien-18-yl hexadecanoate. Moreover fifteen known compounds were also isolated, some of them for the first time identified on Juniperus genus. The compound abieta-8,11,13-trien-18-yl formate is reported for the first time as a natural product. All the structures were established by spectroscopic methods. 2D NMR techniques have allowed the revision of certain previously reported (13)C NMR assignments. Studies on the isolated new compounds showed those possessing a diterpenol ester of a long-chain fatty acid present lipophilicity very distinct from other diterpenoid compounds.
journal_name
Phytochemistryjournal_title
Phytochemistryauthors
Seca AM,Silva AM,Bazzocchi IL,Jimenez IAdoi
10.1016/j.phytochem.2007.07.026subject
Has Abstractpub_date
2008-01-01 00:00:00pages
498-505issue
2eissn
0031-9422issn
1873-3700pii
S0031-9422(07)00505-5journal_volume
69pub_type
杂志文章相关文献
PHYTOCHEMISTRY文献大全abstract::Proteomic analyses of soybean seedlings responding to flooding were conducted to identify key proteins involved. The seeds were germinated on a spongy matrix for two days, and then subjected to flooding for three days. After flooding, the total number of roots, the length of the main root, the lengths of the lateral a...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2008.01.007
更新日期:2008-04-01 00:00:00
abstract::This article has been withdrawn at the request of the author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at http://www.elsevier.com/locate/withdrawalpolicy. ...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2012.03.001
更新日期:2012-03-16 00:00:00
abstract::The widespread secondary metabolite usnic acid, a dibenzofuran derivative, is the principal acetone-soluble compound in the lichen Flavocetraria nivalis. Seasonal variation in concentrations were studied in four populations of this lichen, three from Arctic-alpine habitats in the Northern Hemisphere, and one from Pata...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2004.12.007
更新日期:2005-02-01 00:00:00
abstract::Vernonia sensu lato is the largest and most complex genus of the tribe Vernonieae (Asteraceae). The tribe is chemically characterized by the presence of sesquiterpene lactones and flavonoids. Over the years, several taxonomic classifications have been proposed for Vernonia s.l. and for the tribe; however, there has be...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2018.03.007
更新日期:2018-06-01 00:00:00
abstract::Eleven oleanane-type triterpenoid glycosides, named gordonsaponins A-K, were isolated from the stems of Gordonia kwangsiensis. Their structures were elucidated by spectroscopic and chemical methods. The cytotoxic activities of all eleven were evaluated against five human tumor cell lines (HCT-8, Bel-7402, BGC-823, A54...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2012.08.019
更新日期:2013-01-01 00:00:00
abstract::Four flavonoids with 2',4'-di-oxygenated B-rings, cochinchinol A (1), cochinchinol B (2), (2R,3R)-4',7-dihydroxy-2',5-dimethoxydihydroflavonol (3), 4',7-dihydroxy-2',5-dimethoxyflavonol (4), along with 11 known compounds, were isolated from an ethanolic extract of the roots of Cudrania cochinchinensis. Their structure...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2005.09.015
更新日期:2005-12-01 00:00:00
abstract::Three new spirostanol saponins and two new furostanol saponins were isolated from the fresh leaves of Cordyline stricta. Their structures were elucidated on the basis of spectroscopic analysis, including various 2D NMR techniques, hydrolysis, and by comparison of spectral data of known compounds. Two of the isolated s...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/s0031-9422(97)00545-1
更新日期:1998-01-01 00:00:00
abstract::Microbial transformations of various steroids are reviewed. Developmental studies on immobilization of microbial cells, techniques for selective transformation and better yields of desired metabolites are highlighted. The present position of microbial biotechnology in the steroid drug industry and the future prospects...
journal_title:Phytochemistry
pub_type: 杂志文章,评审
doi:10.1016/s0031-9422(00)90685-x
更新日期:1993-11-01 00:00:00
abstract::Floral scent emission rate and composition of purple and white flower color morphs of Hesperis matronalis (Brassicaceae) were determined for two populations and, for each, at two times of day using dynamic headspace collection and GC-MS. The floral volatile compounds identified for this species fell into two main cate...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2006.12.009
更新日期:2007-03-01 00:00:00
abstract::The profiles of non-volatile oxylipins of pea (Pisum sativum) seedlings were examined by gas chromatography-mass spectrometry after invitro incubation with α-linolenic acid. The 13-lipoxygenase/hydroperoxide lyase (HPL) products were predominant in the leaves, while the roots possess both 13- and 9-HPL products. Allen...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2011.01.013
更新日期:2011-04-01 00:00:00
abstract::A method for the global analysis of yeast intracellular metabolites, based on electrospray mass spectrometry (ES-MS), has been developed. This has involved the optimization of methods for quenching metabolism in Saccharomyces cerevisiae and extracting the metabolites for analysis by positive-ion electrospray mass spec...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/s0031-9422(02)00713-6
更新日期:2003-03-01 00:00:00
abstract::A disproportionately large number of the most important human food plants is cyanogenic. The accumulated research of numerous people working in several different disciplines now allows a tenable explanation for this observation. Cyanogenesis by plants is not only a surprisingly effective chemical defence against casua...
journal_title:Phytochemistry
pub_type: 杂志文章,评审
doi:10.1016/s0031-9422(97)00425-1
更新日期:1998-01-01 00:00:00
abstract::The methanolic extract from the pericarps of Sapindus rarak DC. was found to show pancreatic lipase inhibitory activity (IC50=ca. 614 microg/mL). From the extract, oleanane-type triterpene oligoglycosides, rarasaponins I-III (1-3), and raraoside A (4), were isolated together with 13 known saponins and four known sesqu...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2009.06.015
更新日期:2009-06-01 00:00:00
abstract::In Central America aerial parts of the Asteraceae Milleria quinqueflora are used in traditional medicine as a remedy for skin infections. Reinvestigation of this plant afforded thirteen sesquiterpene lactones (Sls), three of them are new. All isolated Sls were studied for their anti-inflammatory activity using the tra...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/s0031-9422(99)00510-5
更新日期:2000-01-01 00:00:00
abstract::Using a bioassay for inhibition of plant growth and a combination of two countercurrent chromatographies: rotation locular countercurrent chromatography and droplet countercurrent chromatography, two biologically active glycosidal alkaloids, solasonine and solamargine were isolated from fresh ripe fruit of Solanum inc...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/0031-9422(91)83753-8
更新日期:1991-01-01 00:00:00
abstract::A procyanidin dimer xyloside, catechin-(4α→8)-7-O-β-xylopyranosyl-catechin, was isolated from the inner bark of Betula pendula and its structure was determined using 1D and 2D NMR, CD and high-resolution ESIMS. Interestingly, the 7-O-β-xylopyranose unit was found to be present in the lower terminal unit of the dimer. ...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2012.01.008
更新日期:2012-04-01 00:00:00
abstract::Two new cytotoxic mono-tetrahydrofuran acetongenins, annosenegalin and annogalene, have been isolated from the cytotoxic methanolic extract of Annona senegalensis and A. cherimolia seeds. Their structures were established on the basis of 1D and 2D NMR spectroscopic techniques. Annosenegalin belongs to the rare type of...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/0031-9422(95)00891-8
更新日期:1996-05-01 00:00:00
abstract::Three new ent-kaurene diterpenoids, oreskaurins A-C (1-3), together with ten known ent-kaurene diterpenoids, enmenin monoacetate (4), effusanin E (5), adenolin B (6), maoecrystal G (7), enmelol (8), trichokaurin (9), sodoponin (10), trichorabdal A (11), nodosin (12), enmein (13), and a flavonoid, vitexin (14), were is...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2004.02.022
更新日期:2004-04-01 00:00:00
abstract::Microbial transformation of psiadiarabin and its 6-desmethoxy analogue 5,3' dihydroxy-7,2',4'5'-tetramethoxyflavone by Cunninghamella elegans NRRL 1392 gave the 3'-glucoside conjugates of the two flavones. Structural elucidation of these two new metabolites was achieved using 1D and 2D NMR spectroscopy and CIMS. ...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:
更新日期:1997-12-01 00:00:00
abstract::The nematicidal 5-pentyl-2-furaldehyde and the cytotoxic sesquiterpene dermatolactone were isolated from the extracts of an Ascomycete belonging to the Dermateaceae. The furan has previously been reported from the Basidiomycete Irpex lacteus, while dermatolactone is a new compound the structure of which was determined...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/0031-9422(96)00326-3
更新日期:1996-09-01 00:00:00
abstract::Five new oleanane-type saponins, polygalasaponins XLII-XLVI, along with two known saponins were isolated from the roots of Polygala glomerata Lour. The structures of polygalasaponins XLII-XLVI were elucidated as 3-O-beta-D-glucopyranosyl presenegenin 28-O-beta-D-xylopyranosyl-(1-->4)-alpha-L-rhamnopyranosyl- (1-->2)-{...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/s0031-9422(97)00439-1
更新日期:1998-02-01 00:00:00
abstract::Extracts of carboxylic acids from immature fruits of strawberry (Fragaria x ananassa Duch. cv. Elsanta) were analysed for gibberellins by combined gas chromatography-mass spectrometry. The following previously characterised gibberellins were identified by comparison of their mass spectra and Kovats retention indices (...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/s0031-9422(00)00237-5
更新日期:2000-12-01 00:00:00
abstract::Strychnos nux-vomica L. (Loganiaceae) is famous for its monomeric alkaloid content, such as strychnine, a convulsant poison. The stem bark of the tree is traditionally used to treat intermittent fever in South East Asia. In various studies, it appeared that dimeric indolo-monoterpenic alkaloids possess a promising act...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2012.11.002
更新日期:2013-03-01 00:00:00
abstract::The present article is the first comprehensive review on the chemical composition and pharmacological activities of the raw materials of Crocus species. In the present review, data on chemical constituents and pharmacological profile of Crocus sativus stigmas, as well as of other plant parts (perianth, stamens, leaves...
journal_title:Phytochemistry
pub_type: 杂志文章,评审
doi:10.1016/j.phytochem.2019.02.004
更新日期:2019-06-01 00:00:00
abstract::Adaptation to aridity is considered a major factor in the evolution of the genus Eucalyptus. For the first time, targeted metabolite profiling has uncovered a quantitative yet discrete phytochemical link with eucalypt taxonomy. The distribution of cyclitols among Eucalyptus species, and a range of other Australian tre...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2005.11.027
更新日期:2006-02-01 00:00:00
abstract::Dried mosses (five moss species) were progressively extracted and subjected to a four-step Craig distribution. Seven pure flavonoids were isolated and identified. The flavonoids were the flavones apigenin, apigenin-7-O-triglycoside, lucenin-2, luteolin-7-O-neohesperidoside, saponarine and vitexin; and the biflavonoid ...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/s0031-9422(02)00659-3
更新日期:2003-04-01 00:00:00
abstract::ent-19-Hydroxykaur-16-en-15-one is transformed to ent-3 beta,16 beta,19-trihydroxykauran-15-one by Cephalosporium aphidicola. The structure of this metabolite was established by X-ray crystallography. ...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/0031-9422(94)85065-8
更新日期:1994-09-01 00:00:00
abstract::In addition to Z-coniferyl and Z-sinapyl alcohols, bark extracts of Fagus grandifolia also contain significant amounts of the glucosides, Z-coniferin, Z-isoconiferin (previously called faguside) and Z-syringin. The corresponding E-isomers of these glucosides do not accumulate to a detectable level. The accumulation ...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/0031-9422(88)80107-9
更新日期:1988-01-01 00:00:00
abstract::8-dimethylallylnaringenin (8-DMAN) 2'-hydroxylase, which is indispensable for the formation of a lavandulylated flavanone, sophoraflavanone G, was detected in cell suspension cultures of Sophora flavescens. The enzyme catalyzes the 2'-hydroxylation of 8-DMAN to leachianone G, and is tightly bound to the membrane. It r...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/s0031-9422(01)00270-9
更新日期:2001-11-01 00:00:00
abstract::An approach, using well characterized procedures, is presented that should be of general applicability for the structural elucidation of complex sugar moieties of natural products. The methods used are exemplified by the structure elucidation of a new gitogenin-based steroidal saponin that has a strong leishmanicidal ...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/s0031-9422(01)00035-8
更新日期:2001-06-01 00:00:00