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Phytochemistry

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https://www.readbyqxmd.com/read/28633108/bioactivity-and-quantitative-analysis-of-isohexenylnaphthazarins-in-root-periderm-of-two-echium-spp-e-%C3%A2-plantagineum-and-e-%C3%A2-gaditanum
#1
Alexandra G Durán, M Teresa Gutiérrez, Carlos Rial, Ascensión Torres, Rosa M Varela, Manuel M Valdivia, José M G Molinillo, Dominik Skoneczny, Leslie A Weston, Francisco A Macías
Isohexenylnaphthazarins are commonly found in the root periderm of several Boraginaceous plants and are known for their broad range of biological activities. The work described herein concerns the biological activity of compounds from the roots of Echium plantagineum L. and Echium gaditanum Boiss (Boraginaceae) collected from field sites in southern Spain and Australia. Bioactivity was assessed using etiolated wheat coleoptile bioassay and in vitro growth inhibitory activity in HeLa and IGROV-1 cells. The quantification of four isohexenylnaphthazarins (shikonin/alkannin, deoxyshikonin/deoxyalkannin, acetylshikonin/acetylalkannin and dimethylacrylshikonin/dimethylacrylalkannin) was performed by LC-MS/MS using juglone as internal standard...
June 17, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28623738/iridoids-from-the-roots-of-valeriana-jatamansi-jones
#2
Ru-Jing Wang, Hai-Mei Chen, Fan Yang, Yun Deng, Hui Ao, Xiao-Fang Xie, Hong-Xiang Li, Hai Zhang, Zhi-Xing Cao, Li-Xia Zhu, Yin Chen, Cheng Peng, Yu-Zhu Tan
Five iridoids, named as chlorovaltrate P-T, together with six known analogues, (4β,8β)-8-methoxy-3-methoxy-10-methylene-2,9-dioxatricyclo[4.3.1.0(3,7)]decan-4-ol, chlorovaltrate A, (1R,3R,5R,7S,8R,9S)-3,8-epoxy-1-O-ethyl-5-hydroxyvalechlorine, 8-methoxy-4-acetoxy-3-chlormethyl-10-methylen-2,9-dioxa-tricyclo[4.3.1.0(3,7)]decan, (1S,3R,5R,7S,8R,9S)-3,8-epoxy-1-O-ethyl-5-hydroxyvalechlorine, (1R,3R,5R,7S,8R,9S)-3,8-epoxy-1-O-methyl-5-hydroxyvalechlorine were isolated from the roots of Valeriana jatamansi (syn...
June 14, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28618355/chemical-constituents-from-the-fruits-of-ligustrum-japonicum-and-their-inhibitory-effects-on-t-cell-activation
#3
Quynh-Mai Thi Ngo, Hyun-Su Lee, Van Thu Nguyen, Jeong Ah Kim, Mi Hee Woo, Byung Sun Min
A previously undescribed nor-dammarane, 3β,20,23-trihydroxy-24,25,26,27-tetranordammarane; three previously undescribed secoiridoid glycosides, ligujaponosides A-B, and iso-oleonuzhenide; and twenty three known compounds, were isolated from the fruits of Ligustrum japonicum Thunb. Their chemical structures were elucidated by extensive spectroscopic analyses, including 1D and 2D NMR, and HRMS. The isolated compounds were screened for immunosuppressive effects on T activated cells by evaluating interleukin-2 (IL-2) production...
June 12, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28614730/antigenotoxic-prenylated-flavonoids-from-stem-bark-of-erythrina-latissima
#4
Yancho Zarev, Kenn Foubert, Vera Lucia de Almeida, Roel Anthonissen, Esameldin Elgorashi, Sandra Apers, Iliana Ionkova, Luc Verschaeve, Luc Pieters
A series of prenylated flavonoids was obtained from antigenotoxic extracts and fractions of stem bark of Erythrina latissima E. Mey (Leguminosae). In addition to five constituents never reported before, i.e. (2S)-5,7-dihydroxy-2-(4-hydroxy-2-(prop-1-en-2-yl)-2,3-dihydrobenzofuran-6-yl)chroman-4-one (erylatissin D), (2S)-5,7-dihydroxy-2-(4-methoxy-2-(prop-1-en-2-yl)-2,3-dihydrobenzofuran-6-yl)chroman-4-one (erylatissin E), 5,7-dihydroxy-3-(4-methoxy-2-(prop-1-en-2-yl)-2,3-dihydrobenzofuran-6-yl)-4H-chromen-4-one (erylatissin F), (2S)-5,7,8'-trihydroxy-2',2'-dimethyl-[2,6'-bichroman]-4-one (erylatissin G) and (2S)-5,7-dihydroxy-8'-methoxy-2',2'-dimethyl-[2,6'-bichroman]-4-one (dihydroabyssinin I), 18 known flavonoids were identified...
June 11, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28614729/phytochemical-analysis-of-bark-from-helietta-apiculata-benth-and-antimicrobial-activities
#5
Tanize S Fernandes, Daniele Copetti, Gabriele do Carmo, Alexandre T Neto, Marcelo Pedroso, Ubiratan F Silva, Marco A Mostardeiro, Robert E Burrow, Ionara I Dalcol, Ademir F Morel
Extraction and characterization of natural products from the bark of the trunk of Helietta apiculata Benth (Rutaceae) afforded nine alkaloids, eight furoquinoline and one quinolone, limonine, three cinnamic acid derivatives, three neolignans, tetracosanoic acid, six coumarins, of which apiculin A and apiculin B (neolignans), and tanizin (coumarin) are previously undescribed compounds. The structures of all compounds were determined by spectroscopic methods, and the crystal structures of two of the newly undescribed compounds, apiculin A and apiculin B, were determined by X-ray analysis...
June 11, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28614728/triterpenoid-saponins-and-other-glycosides-from-the-stems-and-bark-of-jaffrea-xerocarpa-and-their-biological-activity
#6
Dima Muhammad, Nathalie Lalun, Hélène Bobichon, Elisabeth Le Magrex Debar, Sophie C Gangloff, Mohammed Nour, Laurence Voutquenne-Nazabadioko
Six previously undescribed triterpenoid saponins and two previously undescribed norlupane triterpenes were isolated with five known saponins, three known lupane derivatives, 17,20-didehydro-20-deoxyjujubogenin, rutin, (±) 3α-O-β-d-glucopyranosyl-lyoniresinol, (±) 4-O-β-d-glucopyranosyl-maesopsin, three phenol glycosides, and uridine from the stems and bark of Jaffrea xerocarpa (Baill.) H. C. Hopkins & Pillon (= Basionym Alphitonia xerocarpus Baill.) (Rhamnaceae), an endemic tree of New Caledonia. The chemical structures of the purified compounds were identified by nuclear magnetic resonance and mass spectrometry...
June 11, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28609696/rapid-prediction-and-identification-of-lipase-inhibitors-in-volatile-oil-from-pinus-massoniana-l-needles
#7
Miao Wang, Dongyu Gu, Haoquan Li, Qi Wang, Jie Kang, Tingting Chu, Hong Guo, Yi Yang, Jing Tian
A facile method based on gas chromatography-mass spectrometry (GC-MS) and molecular docking was established to analyze, identify, and predict lipase inhibitors in volatile oil from Pinus massoniana L. needles (PMLN). The volatile oil, with an IC50 value of 15.25 ± 0.06 μg/mL, exhibited potential inhibitory activity against lipase in vitro. In total, 33 compounds were identified from the volatile oil through GC-MS analysis. The major compounds in the volatile oil were β-pinene (39.24%), α-pinene (14...
June 10, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28601199/phytochemistry-change-in-the-editorial-team-and-structure
#8
(no author information available yet)
No abstract text is available yet for this article.
June 7, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28599242/ficusnotins-a-f-rare-diarylbutanoids-from-the-leaves-of-ficus-nota
#9
Felmer S Latayada, Mylene M Uy, Yui Akihara, Emi Ohta, Tatsuo Nehira, Hisashi Ômura, Shinji Ohta
Six diarylbutanoids, designated as ficusnotins A-F, with a rare carbon skeleton consisting of two aromatic rings separated by an unbranched C4-chain have been isolated from the leaves of Ficus nota (Blanco) Merr. (Moraceae). The structures were determined on the basis of spectroscopic data, as well as X-ray crystallographic analysis. The isolated compounds were evaluated for their antibacterial activity against Bacillus subtilis.
June 6, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28599241/triterpene-saponins-from-billia-rosea
#10
Luis De Freitas, Doris Jimenez, Sherley Pimentel, Anne-Claire Mitaine-Offer, Laurent Pouységu, Stéphane Quideau, Thomas Paululat, Freddy Gonzalez-Mujica, Luis B Rojas, María Rodríguez, Marie-Aleth Lacaille-Dubois
Five previously undescribed triterpene saponins, billiosides A-E, and a known analogue, were isolated from the seeds of Billia rosea (Planch. & Linden) C. Ulloa & P. Jørg. Their structures were elucidated on the basis of extensive 1D and 2D NMR experiments ((1)H, (13)C, DEPT, COSY, TOCSY, NOESY, ROESY, HSQC, and HMBC) and mass spectrometry as (3β,21β,22α)-3-[(2-O-β-D-glucopyranosyl-O-[α-L-arabinopyranosyl-(1 → 4)]-β-D-glucopyranosyl)oxy]-21-[((2E,6S)-2,6-dimethyl-6-hydroxyocta-2,7-dienoyl)oxy]-22-(acetyloxy)-24-hydroxyolean-12-en-28-oic acid, (3β,21β,22α)-3-[(2-O-β-D-galactopyranosyl-β-D-glucopyranosyl)oxy]-21,22-dihydroxyolean-12-en-28-yl O-α-L-arabinopyranosyl-(1 → 4)-β-D-glucopyranoside, (3β,21β,22α)-3-[(2-O-β-D-galactopyranosyl-O-[α-L-arabinopyranosyl-(1 → 4)]-β-D-xylopyranosyl)oxy]-21,22-dihydroxyolean-12-en-28-yl O-β-D-glucopyranoside, (3β,21β,22α)-3-[(2-O-β-D-galactopyranosyl-O-[α-L-arabinopyranosyl-(1 → 4)]-β-D-glucopyranosyl)oxy]-21,22-dihydroxyolean-12-en-28-yl O-β-D-glucopyranoside, (3β,21β,22α)-3-[(2-O-β-D-galactopyranosyl-O-[α-L-arabinopyranosyl-(1 → 4)]-β-D-glucopyranosyl)oxy]-21,22-dihydroxyolean-12-en-28-yl O-β-D-glucopyranosyl-(1 → 6)-β-D-glucopyranoside, and dipteroside A...
June 6, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28586721/antibacterial-and-antibiofilm-activities-of-the-metabolites-isolated-from-the-culture-of-the-mangrove-derived-endophytic-fungus-eurotium-chevalieri-kufa-0006
#11
War War May Zin, Suradet Buttachon, Tida Dethoup, José A Pereira, Luís Gales, Ângela Inácio, Paulo M Costa, Michael Lee, Nazim Sekeroglu, Artur M S Silva, Madalena M M Pinto, Anake Kijjoa
Five previously undescribed metabolites, including acetylquestinol, two prenylated indole 3-carbaldehyde derivatives, an anthranilic acid derivative and an isochromone derivative, were isolated, in addition to eleven known compounds: palmitic acid, ergosterol 5,8-endoperoxide, emodin, physcion, questin, questinol, (11S, 14R)-cyclo(tryptophylvalyl), preechinulin, neoechinulin E, echinulin and eurocristatine, from the culture of the endophytic fungus Eurotium chevalieri KUFA 0006. The structures of the previously undescribed compounds were established based on an extensive 1D and 2D NMR spectral analysis as well as HRMS and IR data...
June 3, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28582635/prenylated-flavonoids-from-commiphora-opobalsamum-stem-bark
#12
Ali A El-Gamal, Shaza M Al-Massarani, Wael M Abdel-Mageed, Amina El-Shaibany, Hassan M Al-Mahbashi, Omer A Basudan, Farid A Badria, Mansour S Al-Said, Maged S Abdel-Kader
A phytochemical study on the stem bark of Commiphora opobalsamum looking for cytotoxic compounds afforded eleven flavonoids, including six previously undescribed prenylated congeners, comophorin A-E, and comophoroside A. The structures of the isolated compounds were elucidated on the basis of spectroscopic evidences and correlated with known compounds. Isolated compounds were biologically evaluated using in vitro cytotoxicity MTT-based assay against two cancer cell lines; namely human hepato-cellular carcinoma (HepG-2) and human breast adenocarcinoma (MCF-7)...
June 2, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28577435/aryl-benzofuran-derivatives-from-the-stem-bark-of-calpocalyx-dinklagei-attenuate-inflammation
#13
Deccaux W F G Kapche, Nadège M Lekane, Seda S Kulabas, Hande Ipek, Tugba T Tok, Bonaventure T Ngadjui, Ibrahim Demirtas, Tugba B Tumer
Calpocalyx dinklagei Harms (Fabaceae) is a tropical medicinal tree, which is indigenous to Western Africa. A phytochemical study of this local plant species from its stem bark has led to the isolation of two previously undescribed aryl benzofuran derivatives, named dinklagein A and B, together with eight known compounds. Their chemical structures were elucidated by use of extensive spectroscopic methods (IR, HREI-MS and 1D and 2D NMR). Among all isolates, dinklagein A displayed remarkably potent inhibitory activity against the production of nitric oxide (NO) in the lipopolysaccharide (LPS) induced RAW264...
May 31, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28558268/identification-of-in-situ-flower-volatiles-from-kiwifruit-actinidia-chinensis-var-deliciosa-cultivars-and-their-male-pollenisers-in-a-new-zealand-orchard
#14
Andrew M Twidle, David M Suckling, Alan G Seal, Bruno Fedrizzi, Lisa I Pilkington, David Barker
In situ flower volatiles from six kiwifruit cultivars (Actinidia chinensis var. deliciosa); 'Hayward', 'Chieftain', 'M56', 'Zes007' (Green11), 'M36', and 'M43' were collected by dynamic headspace sampling. Forty-five compounds were detected in the headspace of the flowers, with straight chain hydrocarbons and terpenes accounting for >98% of the volatiles emitted quantitatively across the six cultivars. Of these hydrocarbons, (3Z,6Z,9Z)-heptadecatriene is reported for the first time from a floral source while (8Z)-hexadecene and (9Z)-nonadecene are reported for the first time from kiwifruit flowers...
May 27, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28554036/taxonomy-of-prickly-juniper-juniperus-oxycedrus-group-a-phytochemical-morphometric-combined-approach-at-the-contact-zone-of-two-cryptospecies
#15
Francesco Roma-Marzio, Basma Najar, John Alessandri, Luisa Pistelli, Lorenzo Peruzzi
Based on different essential oil composition paralleling different genotypes, Juniperus deltoides was recently segregated from Juniperus oxycedrus. Despite a clear phytochemical and molecular differentiation, J. deltoides resulted not clearly morphologically discernible from J. oxycedrus, so that it was defined as a cryptospecies. Italy represents the contact zone of their distribution, but the ranges of the two species are not sufficiently known, due to unsatisfactory morphological characterisation. To further complicate the picture, a third closely related species (ecotype), J...
May 26, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28554035/isolation-of-eudesmanes-from-pluchea-odorata-and-evaluation-of-their-effects-on-cancer-cell-growth-and-tumor-invasiveness-in%C3%A2-vitro
#16
Michael Blaschke, Martin Zehl, Beatrix Hartl, Claudia Strauß, Johannes Winkler, Ernst Urban, Georg Krupitza, Brigitte Kopp
The traditionally used Central American medicinal plant Pluchea odorata, known as an anti-inflammatory and cancer cell growth-inhibiting remedy, was subjected to bioassay-guided isolation. Structure elucidation by 1D- and 2D-NMR and MS techniques supported by ECD and UV spectroscopic data revealed seven structurally previously undescribed and eight known eudesmane-type sesquiterpenes. Furthermore, one previously undescribed and one known phytol-like alcohol were identified. All compounds were tested for their cytotoxicity in cancer cells and for their anti-invasive effects...
May 26, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28551080/solar-uv-b-radiation-modulates-chemical-defenses-against-anticarsia-gemmatalis-larvae-in-leaves-of-field-grown-soybean
#17
Francisco M Dillon, Hugo D Chludil, Jorge A Zavala
Although it is well known that solar ultraviolet B (UV-B) radiation enhances plant defenses, there is less knowledge about traits that define insect resistance in field-grown soybean. Here we study the effects of solar UV-B radiation on: a) the induction of phenolic compounds and trypsin proteinase inhibitors (TPI) in soybean undamaged leaves or damaged by Anticarsia gemmatalis neonates during six days, and b) the survival and mass gain of A. gemmatalis larvae that fed on soybean foliage. Two soybean cultivars (cv...
May 25, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28550743/impact-of-drought-stress-on-specialised-metabolism-biosynthesis-and-the-expression-of-monoterpene-synthases-in-sage-salvia-officinalis
#18
Alzahraa Radwan, Maik Kleinwächter, Dirk Selmar
In previous experiments, we demonstrated that the amount of monoterpenes in sage is increased massively by drought stress. Our current study is aimed to elucidate whether this increase is due, at least in part, to elevated activity of the monoterpene synthases responsible for the biosynthesis of essential oils in sage. Accordingly, the transcription rates of the monoterpene synthases were analyzed. Salvia officinalis plants were cultivated under moderate drought stress. The concentrations of monoterpenes as well as the expression of the monoterpene synthases were analyzed...
May 24, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28550715/iridoid-glucosides-in-the-genus-veronica-plantaginaceae-from-new-zealand
#19
Phillip Kroll-Møller, Katja D Pedersen, Chrysoula Gousiadou, Tetsuo Kokubun, Dirk Albach, Rilka Taskova, Phil J Garnock-Jones, Charlotte H Gotfredsen, Søren Rosendal Jensen
Four simple iridoid glucosides, three known esters of catalpol, seven esters of aucubin, and two phenylethanoids were isolated from Veronica hookeri (syn. Hebe ciliolata; Plantaginaceae). Of these, none of four aromatic (p-methoxybenzoyl, isovanilloyl, veratroyl, caffeoyl) 6-O-esters of aucubin and 6″-O-benzoyl mussaenosidic acid, had been reported from nature before. Similarly, three simple iridoid glucosides, two esters of 6-O-rhamnopyranosylcatapol, and two phenylethanoid glucosides, as well as 1-O-benzoyl-3-α-glucuronosylglycerol, and 1-O-β-benzoyl rutinoside were isolated from Veronica pinguifolia (syn...
May 24, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28535421/differentiation-of-crataegus-spp-guided-by-nuclear-magnetic-resonance-spectrometry-with-chemometric-analyses
#20
Jensen A Lund, Paula N Brown, Paul R Shipley
For compliance with US Current Good Manufacturing Practice regulations for dietary supplements, manufacturers must provide identity of source plant material. Despite the popularity of hawthorn as a dietary supplement, relatively little is known about the comparative phytochemistry of different hawthorn species, and in particular North American hawthorns. The combination of NMR spectrometry with chemometric analyses offers an innovative approach to differentiating hawthorn species and exploring the phytochemistry...
May 20, 2017: Phytochemistry
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