Showing papers in "Phytochemistry Letters in 2023"

TL;DR: Piperine 1, an alkaloid isolated from the black pepper plant (Piper nigrum L), has been reported to possess various biological activities as mentioned in this paper , which may facilitate the design and development of novel anti- Alzheimer's drugs based on natural piperine.

TL;DR: Two new indole alkaloids, colletotryptins G (1) and H (2), along with four known alkaloid (3, 6) were isolated from an endophytic fungus Colletotrichum sp. HD-1 (Melanconiaceae) derived from the mangrove plant Acrostichum aureum (Pteridaceae) as mentioned in this paper .

TL;DR: In this article , five new and twelve known steroidal saponins were isolated from the bulbs of Allium chinense G.Don, and all isolates were evaluated for inhibition of porcine pancreatic lipase activity.

TL;DR: In this paper , a chemical investigation on the fungus Phellinus baumii led to the isolation of twenty-two compounds, including two undescribed sesquiterpenes, namely phellinbaumins A and B, and three alkyl-benzene derivatives.

TL;DR: In this article , the chemical profiles of Thai bee pollen using molecular networking analysis and observed one major cluster, which contained acylated flavonoid 8-methoxykaemferol-3-O-(2″-p-coumaroyl)-glucoside (1).

TL;DR: In this paper , two diastereotopic labdane diterpenoids (+)-(5 S,9 S,10 S,15 R) coronarin D methyl ether (1) and (-)-( 5 R,9 R, 10 S, 15 S), respectively, were successfully separated and purified from their mixture by recycling high performance liquid chromatography (RHPLC) and characterized using 1D and 2D NMR, MS and FTIR analyses.

TL;DR: In this article , four sesquiterpenoid glycosides (1－4) were evaluated for their inhibitory effects on NO production in LPS-induced BV-2 microglial cells.

TL;DR: In this paper , eleven phenolic compounds including four new ones, (R)-4-(1-methoxypropyl)phenol (1), (S)-3-(4-hydroxy-3methoxyphenyl)propane-1,2-diyldiacetate (2),(R)-3(4)-hydroxymethylpropylpropylphenol(3)-propane(1, 2, 3, 4, 3) and 3′-demethoxycrataegusanoid E (4) were isolated from the fruits of Alpinia galanga and the structures of new compounds were elucidated on the basis of extensive spectroscopic data.

TL;DR: In this paper , two novel dicyclic C-geranylated flavanones, fortunones D (1) and E (2), were isolated from the fresh mature fruits of Paulownia fortunei (Seem.) Hemsl.

TL;DR: In this article , two monoterpenoids, muhuang acid A (1) and muhuiang acid B (2), together with six known compounds (3-8) were isolated from the stems of Ephedra sinica Stapf.

TL;DR: In this article , a case-3D configurational analysis based on DFT predictions of 13C chemical shifts, provided very bad fits for all possible diastereoisomeric Lycorine-type structures and reexamination of the NMR data reported for natural (-)-amarbellisine revealed several inconsistencies with the proposed lycorinelike structure.

TL;DR: In this article , four new lignan glycosides and four known analogues were isolated from the stems of Stephania cepharantha Hayata and extensive spectroscopic analysis was used to study their structures, and electronic circular dichroism and optical rotatory dispersion data were used to establish their absolute configurations.

TL;DR: In this paper , two β-carboline alkaloids, peganuharmines A and B (1 and 2), together with three known ones (3, 5) were isolated from the seeds of Peganum harmala.

TL;DR: In this paper , a review of pharmaceutically relevant metabolites identified from endophytes isolated from plants growing in different ecological niches is presented, where the authors discuss the studies undertaken towards epigenetic modifications of biosynthetic gene clusters of endophyte for activation of silent or cryptic genes.

TL;DR: In this paper , two monoterpenoid indole alkaloids, named alstoscholines A and B (1 and 2), along with three known ones (3, 5) were isolated from the stems of Alstonia scholaris.

TL;DR: In this article , bioactivity-guided isolation from the twigs of Ligustrum lucidum Aiton (Oleaceae) led to the separation of three new compounds, ligustlignanosides A (1), B (2), and C (3), along with five neolignans (4-8), and eight triterpenoids (9-16).

TL;DR: In this article , the trisacharide β-d-glucopyranosyl-(1→3)[β-dglocopyranoyl-( 1→6)]-βdglucophyranoside linked to C-28 of aglycone was common to all isolated compounds.

TL;DR: Wang et al. as mentioned in this paper reported six new sesquiterpenes, saussunosids A-E (1, 3−6) and saussureamine F (2), from the roots of S. lappa collected in Lijiang county, Yunnan province, China.

TL;DR: In this article , triterpenoids from the whole herbs of Euphorbia humifusa have been identified and their structures were elucidated by spectroscopic analysis and optical rotation calculations.

TL;DR: In this article , four new glycosides, named 3-dehydroxyl dracunculifoside J (1), 4-methoxy divaricataester C (2), 6′-O-acetyl gerberinside (3), and 4 methoxy marmesinin (4), along with six known compounds (5-10), were isolated from the whole plant of Gerbera piloselloides.

TL;DR: In this article , the authors showed that BAE treatment significantly reduced SkBr3 and MDA-MB-231 cell proliferation in a concentration-dependent manner and inhibited colony formation.

TL;DR: In this article , the structures of the new and known compounds, including their absolute configurations, were elucidated by NMR, IR, UV, MS and ECD, and the results indicate that compounds 1−7 may be less toxic anti-type-2 diabetic agents.

TL;DR: In this paper , 10 aromatic polyketides (1-10), including a new pair of atropisomers (1 and 2) and two new compounds (3 and 4), were isolated from the culture of an endophytic Aspergillus sclerotiorum.

TL;DR: In this paper , three new isoquinoline alkaloids, together with four known isoquinolines were isolated from the cigar tobacco-derived endophytic fungus Aspergillus felis.

TL;DR: In this paper , two undescribed indole alkaloids, 7,10-dihydroxyindolenine (1a) and pendulifloramine (2), were determined based on NMR and mass spectra, together with database mining and computer-assisted structure elucidation.

TL;DR: Two chromones and four chromone C-glycosides (1-6) were isolated from the whole plant of Hypericum elodeoides and their structures were characterized by comprehensive analysis of their UV, NMR, ECD and HRESIMS data as discussed by the authors .