Related Experiment Video
Updated: Apr 5, 2026
12:00
Extraction and Purification of Polyphenols from Freeze-dried Berry Powder for the Treatment of Vascular Smooth Muscle Cells In Vitro
Published on: July 5, 2017
20.2K
Three new iridoids from two Viburnum species
Min Fan1,2, Yu-Cheng Liu1,2, Wei-Wei Jiang1,2
1a State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650204 , China.
Journal of Asian Natural Products Research
|August 20, 2015
Summary
Three new iridoid compounds were discovered in Viburnum species. One compound showed moderate anti-inflammatory effects in cellular assays, indicating potential therapeutic applications.
Area of Science:
- Natural Product Chemistry
- Pharmacology
- Medicinal Chemistry
Background:
- Viburnum species are known sources of bioactive natural products.
- Iridoids are a class of monoterpenes with diverse biological activities.
- Understanding the chemical constituents of medicinal plants is crucial for drug discovery.
Purpose of the Study:
- To isolate and characterize new iridoid compounds from Viburnum species.
- To evaluate the anti-inflammatory potential of the isolated compounds.
Main Methods:
- Isolation of compounds using chromatographic techniques.
- Structure elucidation using 1D and 2D Nuclear Magnetic Resonance (NMR) spectroscopy.
- Assessment of anti-inflammatory activity using nitric oxide (NO) production assays in lipopolysaccharide (LPS)-stimulated RAW 264.7 cells.
Main Results:
- Three new iridoids, 10-deacetyl suspensolide A aglycone (1), 7-deacetyl suspensolide A aglycone (2), and 7,10-dideacetyl suspensolide A aglycone (3), were successfully isolated.
- The structures of compounds 1-3 were confirmed through comprehensive spectroscopic analysis.
- Compound 2 demonstrated moderate anti-inflammatory activity with an IC50 value of 17.2 μM against NO production.
Conclusions:
- The study successfully identified novel iridoid structures from Viburnum plants.
- Compound 2, 7-deacetyl suspensolide A aglycone, exhibits promising anti-inflammatory properties.
- Further research into compound 2 may lead to the development of new anti-inflammatory agents.
Related Concept Videos
01:21IR Absorption Frequency: Hybridization
1.7K
Hydrocarbons such as alkanes, alkenes, and alkynes show characteristic C–H stretching absorption bands. These IR stretching frequencies depend on the hybridization of the involved carbon atom and can be explained in terms of the s character of each hybridized atomic orbital.
Among the sp, sp2, and sp3 hybridized orbitals, sp orbitals have the maximum s character (50%). Consequently, the electrons are held more closely to the nucleus, resulting in stronger and shorter C–H bonds that...
Among the sp, sp2, and sp3 hybridized orbitals, sp orbitals have the maximum s character (50%). Consequently, the electrons are held more closely to the nucleus, resulting in stronger and shorter C–H bonds that...
1.7K
01:23Redox Titration: Iodimetry and Iodometry
7.1K
Iodometry and iodimetry are analytical methods used to determine the concentration of oxidizing or reducing agents using iodine. In iodometric titrations, the oxidizing analyte solution is usually acidified and treated with an excess of iodide ions, which generates an equivalent amount of iodine in equilibrium with triiodide. The released iodine is subsequently titrated directly against a standardized reducing agent. As the dilute iodine color becomes pale yellow, a few drops of freshly...
7.1K
03:24Seedless Vascular Plants
71.2K
Seedless Vascular Plants Were the First Tall Plants on Earth
71.2K
01:23Red Algae
1.9K
Red algae, also known as rhodophytes, are primarily found in marine environments, though some species inhabit freshwater and terrestrial ecosystems. These organisms exist in both unicellular and multicellular forms, with some multicellular varieties reaching macroscopic sizes.As phototrophic organisms, red algae contain chlorophyll a; however, their chloroplasts lack chlorophyll b. Instead, they possess phycobiliproteins, which serve as major light-harvesting pigments, similar to those found in...
1.9K
01:13Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
8.0K
Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.
8.0K
01:25IR Spectrometers
3.4K
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
3.4K