Six new ent-abietane lactones (1-6), three new esterified tetracyclic triterpenes (7-9), and seven known diterpenoids and triterpenoids were isolated from the roots of Euphorbia retusa. Their structures were elucidated by means of spectroscopic studies including 1D and 2D NMR, mass spectrometry, chemical transformation, and comparison with literature data.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/np900127j | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Two new sesquiterpenoids and two new diterpenoids from Croton lauioides with anti-inflammatory and cytotoxic activities.
Fitoterapia
January 2025
Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, China; Yunnan Provincial Key Laboratory for Conservation and Utilization of In-forest Resource, Southwest Forestry University, Yunnan Kunming, 650224, China. Electronic address:
Two new tropolone-bearing sesquiterpenoids (1-2), two new dolabrane-type diterpenoids (3-4) along with eight known compounds as ionone-type sesquiterpenoid (5), oleanane triterpenoid (6), vanillin and its derivative (7-8), neolignan (9), two lignans (10-11), flavanonol glycoside (12) were isolated from whole plants of Croton lauioides Radcl.-Sm. & Govaerts.
View Article and Find Full Text PDFBetween scents and sterols: Cyclization of labdane-related diterpenes as model systems for enzymatic control of carbocation cascades.
J Biol Chem
December 2024
Roy J. Carver Department of Biochemistry, Biophysics & Molecular Biology, Iowa State University, Ames, IA 50011, USA.
The citrus scent arises from the volatile monoterpene limonene, whose cyclic nature can be viewed as a miniaturized form of the poly-cyclic sterol triterpenoids. In particular, as these rings are all formed from poly-isoprenyl precursors via carbocation cascades. However, the relevant reactions are initiated by distinct mechanisms, either lysis/ionization of an allylic diphosphate ester bond, as in limonene synthases, or protonation of a terminal olefin or epoxide, as in lanosterol synthases.
View Article and Find Full Text PDFA review of L. genus (Moraceae): a source of bioactive compounds for health and disease. Part 1.
Am J Transl Res
November 2024
Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional Ciudad de México, México.
The L. genus, belonging to the Moraceae family, includes around 850 species that are widely distributed in tropical and subtropical regions around the world; including the Eastern Mediterranean, Asia, Africa, Australia, and a large territory of America. Among the most important species are , , , , , Vahl, , , , and .
View Article and Find Full Text PDFDiterpenoids and Triterpenoids from the Aerial Parts of and Their Biological Activities.
ACS Omega
December 2024
State Key Laboratory of Quality Research in Chinese Medicine, Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious Disease, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau 999078, People's Republic of China.
Five undescribed diterpenoids, serranins A-E (-), and four novel triterpenoids, serratic acids A-D (-), along with 32 known terpenoids (-) were isolated from the aerial parts of . The planar structures of - and their relative configurations were established on the basis of extensive spectroscopic analysis. Structurally, compounds - are the first examples of 18,19--ursane -coumaric or ferulic esters, while compounds - further enriched the plant's diterpene profile.
View Article and Find Full Text PDFIntervention mechanism of amphiphilic natural sweeteners on starch chain dynamic behavior: Computational and experimental insights.
Carbohydr Polym
February 2025
College of Biosystems Engineering and Food Science, Key Laboratory for Quality Evaluation and Health Benefit of Agro-Products of Ministry of Agriculture and Rural Affairs, Key Laboratory for Quality and Safety Risk Assessment of Agro-Products Storage and Preservation of Ministry of Agriculture and Rural Affairs, Zhejiang University, Hangzhou 310058, China. Electronic address:
Article Synopsis
- Amphiphilic natural sweeteners like steviol glycosides (STE) and glycyrrhizic acid (GA) enhance the properties of starchy products by influencing their chain behaviors such as unwinding and movement.
- The study used molecular dynamic simulations and experiments to show that both sweeteners promote chain unwinding while preventing long-term reassociation, with GA being more effective than STE in these aspects.
- At higher concentrations, GA significantly alters the microstructure of starch, resulting in increased hardness and a slower rate of starch digestion, which may be beneficial for developing new starch-sweetener composite materials.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!