Showing papers in "Phytochemistry Letters in 2017"

TL;DR: P. thuringiaca could be a valuable natural source of antioxidants with interesting inhibitory actions against the key enzymes involved in several human diseases, and could represent a valid starting point for the development of new treatment and management strategies, including its use as a food supplement.

TL;DR: This review draws attention to the necessity of developing modern analytical tools for identification and quantification of individual M. sativa phytochemicals.

TL;DR: Different in vitro culture systems of the East-Asian origin medicinal plant species − Schisandra chinensis, were tested in order to investigate their potential for the accumulation of two groups of phenolic compounds.

TL;DR: In this paper, the authors present a plant containing cyclitols, with emphasis put on their pharmaceutical properties, focusing on sample preparation, extraction and purification and on analysis of cyclitol compounds in plants.

TL;DR: An endophytic fungus isolated from the leaves of a mangrove plant Acanthus ilicifolius exhibited significant antibacterial activity and was purified to afford two new depsidones, talaromyones A and B, along with five known dePSidone analogs.

TL;DR: In this article, the structures and relative configuration of the new compounds were unambiguously determined based on HRESIMS and extensive 1D and 2D NMR spectroscopic analyses.

TL;DR: In this article, the absolute configuration of sugars was determined by chemical methods using 1D and 2D NMR and HRESIMS, and the structure elucidation of 3‴-carbonyl-2″-β- l -quinovosyl icariin was reported for the first time.

TL;DR: High mass accuracy fragmentation spectra for all compounds investigated herein were uploaded into the Global Natural Products Social molecular networking library and can be used to facilitate their future identification in H. canadensis or other botanicals.

TL;DR: In this paper, a new seco-phenanthroindolizidine alkaloid along with prodensiflorins A and B (2-3), two new proaporphine alkaloids, were isolated from the leaves of Cryptocarya densiflora Blume.

TL;DR: In this article, the formation of arbutin from hydroquinone in O. majorana shoot cultures was investigated using methanol extracts from dry biomass and lyophilized media using HPLC-DAD.

TL;DR: In this article, five new terpenoids, including three sesquiterpenes 11-hydroxy-8-ox-alismoxide (1), 11-oxo-13-nor -alismol (2), and 1β,11-dihydroxy-β-cyperone (3), and two protostane-type triterpenoids 16β-acetoxy alisol B (4 ) and 16α-acetoxalis B (5 ) were isolated from the rhizomes of Alisma orientalis together

TL;DR: This work used the Seven Golden Rules, Sirius2 and MS-FINDER software for determination of molecular formulas, and queried the formulas in different natural product databases including DNP, UNPD, ChemSpider and REAXYS to obtain molecular structures.

TL;DR: Two new flavonoid glycosides, excavaside A and B (2), together with 14 known compounds, myricetin 3- O -β- d -rutinoside (3), miRtin 3,3′-di-α- l -rhamnopyranoside (4), myricitrin (6), myRICetin (7), quercitrin(8), clauslactone B (9), etc., have been isolated and identified from this plant for the first time as discussed by the authors.

TL;DR: In this article, four new farnesylated isoindolinone derivatives, named stachybotrysams A, D, E, and E, were isolated from the filamentous fungus Stachybotry chartarum CGMCC 35365.

TL;DR: HPLC profiling of the mycelial culture of a poroid basidomycete collected in Mount Elgon, Kenya, led to isolation of two previously undescribed lanostane type triterpenes, which are proposed to be laetiporins A and B.

TL;DR: In this article, 11 previously undescribed sesquiterpenes 1 − 4 (named incarnatins A − D) and 6 − 12 (called incarnolactones A − C, incarnatin E, incarnate methyl ester, incarnetic acid, and incarnatenin), together with two known compounds, chondrosterin B (13 ) and (E )-dictyochromenol (14 ), were isolated from the mushroom Gloeostereum incarnatum BCC41461 The chemical structures were determined on the basis of 1D

TL;DR: Three new thiodiketopiperazine derivatives were isolated and identified from the laboratory culture of Setosphaeria rostrata, an endophytic fungus obtained from the fresh asymptomatic leaf tissues of the medicinal plant Costus speciosus from Sri Lanka.

TL;DR: The application of NMR-based metabolomics (1D and 2D) combined with multivariate data analysis and an HPLC method development for quantitative determination of the metabolic differences in R. rosea rhizomes, roots and aerial parts from its natural habitat in Bulgaria is reported on.

TL;DR: Two new protolimonoid compounds, namely, argentinin A (1) and B (2) along with five known triterpenoid compounds (dammar-24-en-3α-ol (3), 3-epi-cabraleahydroxy lactone (4), (E)-25-hydroperoxydammar-23-EN-3β,20-diol (5), mixture of eichlerianic acid and shoreic acid (6a and 6b), and dammar- 24-

TL;DR: In this paper, the utility of HPTLC and HILIC/ESI-Q-TOF-MS for the determination of pyrrolizidine alkaloids (PAs) and their N -oxides (PANOs) was compared in the selected plant species: Tussilago farfara L. (TF, flower) and Arnebia euchroma (Royle) I.M. Johnst.

TL;DR: Recent research on the importance and emission of floral scents are summarized and the role of the identified MYB transcription factors in regulating floral volatile metabolism is emphasized.

TL;DR: These isolated compounds exhibited significantly inhibitory effects on the NA with IC50 values ranging from 8.4 to 94.1 μM and were found to protect MDCK cells from A (H1N1) influenza infections with very low cytotoxicity to the host cells.

TL;DR: In this paper, a comparison of phytochemical analyses of hydroalcoholic extracts from roots of S. miltiorrhiza (SM) and S. przewalskii (SP) were performed using two complementary LC-MS systems: the first system HPLC-DAD-MS n an ion trap mass spectrometer and the second system consisted high resolution MS/MS Orbitrap mass analyzer.

TL;DR: Testing for inhibitory activity against acetylcholinesterase (AChE), related to pathogenesis of Alzheimer’s disease, indicated that N-acetyltryptophan could be a promising model molecule for AD treatment.

TL;DR: The phytochemical content in E. hermaphroditum turned out to be diverse, plant-part specific and to vary a lot among the populations, and some groupings of populations could be formed according to their phenolic constituents by PCA.

TL;DR: Three new acetophenone glycosides (1-3), and five known acetophenones (4-8) were identified from an extract of the Euphorbia fischerian root that exhibited bioactivity toward lymphoid tuberculosis and pulmonary tuberculosis.

TL;DR: In this article, the authors compared various extraction methods for quantitative and qualitative analysis (ESI-MS/MS) of phenolic acids present in extracts obtained from leaves, flowers, and roots of Impatiens glandulifera.

TL;DR: Two new compounds, named leptospyranonaphthazarin A and leptosnaphthoic acid A, together with four known compounds, were isolated from an endophytic fungus Leptosphaerulina sp.

TL;DR: This work submitted two solution sets for the CASMI 2016 contest to evaluate current chemical structure identification strategies for 19 natural products using high-resolution LC-MS andLC-MS/MS challenge datasets using automated methods with or without the combination of other tools.

TL;DR: Three new pseudo-disesquiterpenoids, vernodalidimer F – H, which are formed by esterification of two sesquiter penoids, along with a new sesQuiterpenoid and two known sesQUiterpeonids were isolated from the seeds of Vernonia anthelmintica, and their structures were elucidated by NMR data.