Abstract:
:Leaves, stem bark and root of Lonchocarpus xuul and Lonchocarpus yucatanensis were studied separately. A chalcone, 2',4-dimethoxy-6'-hydroxylonchocarpin (), and the flavones 5,4'-dihydroxy-3'-methoxy-(6:7)-2,2-dimethylpyranoflavone (2) and 5,4'-dimethoxy-(6:7)-2,2-dimethylpyrano-flavone (3), together with the known carpachromene (4), were isolated from the leaves of both species. Similarly, the previously reported flavans xuulanin (5) and 3beta-methoxyxuulanin (6), together with the novel 3beta,4beta,5-trimethoxy-4'-hydroxy-(6:7)-2,2-dimethylpyranoflavan (7), 3-hydroxy-4,5-dimethoxy-(6:7)-2,2-dimethyl-pyranoflavan (8), and 3,4-dihydroxy-5-methoxy-(6:7)-2,2-dimethylpyranoflavan (10), were isolated from the stem bark and root of both species. Finally, the known 2',4'-dihydroxy-3'-(3-methylbut-2-enyl) chalcone (13) was obtained from the root of L. xuul only. The structures of the various metabolites were established by interpretation of their spectroscopic data.
journal_name
Phytochemistryjournal_title
Phytochemistryauthors
Borges-Argáez R,Peña-Rodríguez LM,Waterman PGdoi
10.1016/s0031-9422(02)00131-0subject
Has Abstractpub_date
2002-07-01 00:00:00pages
533-40issue
5eissn
0031-9422issn
1873-3700pii
S0031942202001310journal_volume
60pub_type
杂志文章相关文献
PHYTOCHEMISTRY文献大全abstract::Ginseng occupies a prominent position in the list of best-selling natural products in the world. Compared to the long history of use and widespread research on Asian ginseng, the study of American ginseng is relatively limited. In the past decade, some promising advances have been achieved in understanding the chemist...
journal_title:Phytochemistry
pub_type: 杂志文章,评审
doi:10.1016/j.phytochem.2011.02.012
更新日期:2011-06-01 00:00:00
abstract::The new phenylethanoid glycosides 2-O-acetyl-3'''-O-methylverbascoside and 2,4"-di-O-acetyl-3'''-O-methylverbascoside were isolated and identified from Penstemon crandallii. The major iridoid glycoside was plantarenaloside and no aucubin type iridoids were found. This contrasted with a previous analysis of P. teucrioi...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/0031-9422(95)00172-4
更新日期:1995-08-01 00:00:00
abstract::Two novel anthocyanins, delphinidin 3-O-(6-O-cis-p-coumaroyl-beta-D-glucoside)-5-O-(6-O-malonyl-beta-D -glucoside) and petunidin 3-O-(6-O-trans-p-coumaroyl-beta-D-glucoside)-5-O-(6-O-malonyl-beta -D-glucoside) , were isolated from the blue flowers of Hyacinthus orientalis cv. Delft Blue. Five known acylated anthocyani...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/0031-9422(94)00778-r
更新日期:1995-03-01 00:00:00
abstract::A new bisdesmodic triterpenoid saponin, dulcin was isolated from the seeds of Pithecellobium dulce and was identified as 3-O-[beta-D-glucopyranosyl (1-->2)-alpha-L-arabinopyranosyl]- 28-O-[beta-D-xylopyranosyl (1-->6)-beta-D-glucopyranosyl]-echinocystic acid. The known oleanolic acid saponin PE, oleanolic acid 3-O-bet...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/s0031-9422(00)90425-4
更新日期:1994-11-01 00:00:00
abstract::[(3)H](+)-delta-Cadinene and its 8-hydroxy derivative, prepared from (1RS)-[1-(3)H]FPP by the action of one and two recombinant enzymes, respectively, were infiltrated into cotyledons of bacterial blight-resistant cotton plants as they biosynthesized sesquiterpene phytoalexins in response to infection by Xanthomonas c...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/s0031-9422(03)00270-x
更新日期:2003-09-01 00:00:00
abstract::A broad-based characterisation of a pharmacologically active dichloromethane extract from Isatis tinctoria leaves was carried out. For a comprehensive picture we also included the polar constituents of I. tinctoria (MeOH extract) and for comparative purposes, the taxonomically closely related plant I. indigotica. Diod...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2009.04.019
更新日期:2009-05-01 00:00:00
abstract::Six coumarins have been isolated from the fruits and the stem bark of Calophyllum dispar (Clusiaceae). The structures of these minor components were established by means of spectroscopic analysis, including extensive 2D NMR studies. Some of these coumarins exhibited a significant cytotoxic activity against KB cells. ...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/s0031-9422(01)00285-0
更新日期:2001-10-01 00:00:00
abstract::Three plant proteinase inhibitors BbKI (kallikrein inhibitor) and BbCI (cruzipain inhibitor) from Bauhinia bauhinioides, and a BrTI (trypsin inhibitor) from B. rufa, were examined for other effects in Callosobruchus maculatus development; of these only BrTI affected bruchid emergence. BrTI and BbKI share 81% identitie...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2009.10.009
更新日期:2010-02-01 00:00:00
abstract::Five Ib-type cyclopeptide alkaloids, jubanines F-J (1-5), and three known compounds, nummularine B (6), daechuine-S3 (7), and mucronine K (8) were isolated from the roots of Ziziphus jujuba. Their structures were fully characterized by spectroscopic analyses in combination with chemical derivatization. Compounds 1-3, ...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2015.09.001
更新日期:2015-11-01 00:00:00
abstract::A new guaiane sesquiterpenoid glycoside together with known sesquiterpenoids and iridoid glycosides have been isolated from the rhizomes and roots of Valeriana fauriei. The 13C NMR assignments of the isolated compounds are presented. ...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/0031-9422(92)83718-e
更新日期:1992-10-01 00:00:00
abstract::Terpene synthases (TPS) require divalent metal ion co-factors, typically magnesium, that are bound by a canonical DDXXD motif, as well as a putative second, seemingly less well conserved and understood (N/D)DXX(S/T)XXXE motif. Given the role of the Ser/Thr side chain hydroxyl group in ligating one of the three catalyt...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2008.12.022
更新日期:2009-02-01 00:00:00
abstract::This work used Δ5-sterols and their degradation products to compare the efficiency of biotic and abiotic degradation processes in senescent Mediterranean marine (Posidonia oceanica) and terrestrial (Quercus ilex and Smilax aspera) angiosperms. Type II photosensitized oxidation processes appeared to be more efficient i...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2019.112097
更新日期:2019-11-01 00:00:00
abstract::Dendrobium nobile is an important medicinal orchid having profound importance in traditional herbal drug preparations and pharmacopeias worldwide. Due to various anthropogenic pressures the natural populations of this important orchid species are presently facing threats of extinction. In the present study, genetic an...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2015.06.022
更新日期:2015-09-01 00:00:00
abstract::Four cucurbitacins, bacobitacin A-D (1-4) as well as, a known cytotoxic, cucurbitacin E (5) together with three known phenylethanoid glycosides, monnieraside I, III and plantioside B were isolated form the aerial part of Bacopa monnieri. Their structures were elucidated on the basis of extensive spectroscopic investig...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.03.013
更新日期:2007-05-01 00:00:00
abstract::Cistus creticus L., an aromatic species from the Mediterranean area, contains various diterpenes bearing the labdane skeleton. The production of essential oil from this species has potential economic value, but so far, it has not been optimized. In order to contribute to a better knowledge of this species and to its d...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2009.06.013
更新日期:2009-06-01 00:00:00
abstract::Asclepias fruticosa afforded, in addition to five known pregnane glycosides and 11 known cardenolide glycosides, four new pregnane glycosides and eleven new cardenolide glycosides. Structures of these compounds were elucidated by spectroscopic methods and from chemical evidence. ...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/0031-9422(94)85029-1
更新日期:1994-09-01 00:00:00
abstract::Dietary intake of proanthocyanidins (PAs) has been largely unknown because of the lack of reliable values for their content in foods. Recent development of an analytical method for PAs has allowed the quantification of individual oligomers and polymers. This method has been employed to analyze food samples collected u...
journal_title:Phytochemistry
pub_type: 杂志文章,评审
doi:10.1016/j.phytochem.2005.03.025
更新日期:2005-09-01 00:00:00
abstract::Society demands chemicals from sustainable sources. Identification of commercially important chemicals in crops increases value in biorefineries and reduces reliance on petrochemicals. Miscanthus sinensis and Miscanthus sacchariflorus are high-yielding distinct plants, which are sources of high-value chemicals and bio...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2013.04.004
更新日期:2013-08-01 00:00:00
abstract::Black aspergilli are distributed worldwide and represent one of the most prolific sources of metabolites with biomedical and agrochemical interests. However, due to their similar morphological characteristics and insufficient molecular identification, the taxonomic classification of black aspergilli remains ill-define...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2020.112399
更新日期:2020-08-01 00:00:00
abstract::Withania somnifera, known in India as Asghawhanda, is used traditionally to treat many medical problems including diabetes and has demonstrated therapeutic activity in various animal models as well as in diabetic patients. While much of W. somnifera's therapeutic activity is attributed to withanolides, their role in t...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2015.02.029
更新日期:2015-08-01 00:00:00
abstract::Profiles of terpenoid glycoside metabolites in glandular trichomes of Solanum habrochaites LA1777 leaves were generated using ultrahigh performance liquid chromatography/time-of-flight mass spectrometry with multiplexing of non-selective collision-induced dissociation (CID). Profiling data suggested a diverse group of...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2013.11.011
更新日期:2014-02-01 00:00:00
abstract::Seven neo-clerodanes (teupolins VI-XII) and eleven known compounds were isolated and characterized from leaf extracts of Teucrium polium L., a medicinal plant used in traditional and herbal medicine for its hypolipidemic, hypoglycemic, antioxidant and antiproliferative properties. The structures of these compounds wer...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2011.07.006
更新日期:2011-11-01 00:00:00
abstract::A bioassay-guided fractionation of Agave offoyana leaves led to the isolation of five steroidal saponins (1-5) along with six known saponins (6-11). The compounds were identified as (25R)-spirost-5-en-2α,3β-diol-12-one 3-O-{α-l-rhamnopyranosyl-(1→3)-O-β-d-glucopyranosyl-(1→2)-O-[β-d-xylopyranosyl-(1→3)]-O-β-d-glucopyr...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2014.05.014
更新日期:2014-09-01 00:00:00
abstract::Anti-inflammatory activity guided fractionation of the n-hexane soluble fraction of a 70% aqueous methanolic extract of the dried fruits of Forsythia suspensa afforded two new triterpenes. The structures of these compounds were elucidated as 3beta-acetyl-20,25-epoxydammarane-24alpha-ol (1) and 3beta-acetyl-20,25-epoxy...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/s0031-9422(01)00028-0
更新日期:2001-04-01 00:00:00
abstract::Three alkaloids, neoharringtonine, homoneoharringtonine and 3'S-hydroxyneoharringtonine, were isolated from the leaves and stems of Cephalotaxus harringtonia var. drupacea. Their structures were established by spectroscopic methods, including two-dimensional NMR and CD spectra, and their antileukaemic activity was eva...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/s0031-9422(96)00574-2
更新日期:1997-02-01 00:00:00
abstract::A high purity of β-D-glucan (80.8%) from hull-less barley (Hordeum vulgare L. var. nudum Hook. f.) (HBBG) was isolated by alkali extraction and multi-precipitation with ethanol. The molecular weight (Mw) of HBBG was determined as 571.4 kDa with a broad distribution (Mw/Mn = 1.6) by using HPSEC. According to methylatio...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2018.08.004
更新日期:2018-11-01 00:00:00
abstract::From the MeOH extract of the leaves of W. japonica, seven phenylpropanoid gentiobiosides (1-7) were isolated along with eight known phenylpropanoids (8-15). Structures of 1-7 were determined based on spectroscopic data and chemical evidence. The activity of compounds 1-15 to scavenge superoxide anion radicals was inve...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2007.08.021
更新日期:2008-02-01 00:00:00
abstract::Fomannoxin is a biologically active benzohydrofuran, which has been suggested to be involved in the pathogenicity of the root rotting fungus Heterobasidion annosum sensu lato. The biosynthesis of fomannoxin was investigated through an isotopic enrichment study utilizing [1-¹³C]glucose as metabolic tracer. ¹³C NMR spec...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2012.08.008
更新日期:2012-12-01 00:00:00
abstract::Eleven benzofuran dimers, (+)-dieupachinins A-E, (-)-dieupachinins A-E and dieupachinin F, a benzofuran trimer trieupachinin A, as well as seven known compounds were isolated from the roots of Eupatorium chinense. The enantiomers of racemates dieupachinins A-E were separated by chiral HPLC. The structures with absolut...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2015.11.013
更新日期:2016-02-01 00:00:00
abstract::Bioassay-guided fractionation of an extract prepared from the fruits of Cordia sebestena led to the isolation of sebestenoids A-D (1-4). Their structures were elucidated on the basis of extensive NMR experiments and mass spectroscopic measurements. Compounds 1-4 exhibited moderate inhibition of the aspartic protease B...
journal_title:Phytochemistry
pub_type: 杂志文章
doi:10.1016/j.phytochem.2010.09.008
更新日期:2010-12-01 00:00:00