Four new trimeric stilbene glucosides from Welwitschia mirabilis

Area of Science:

• Phytochemistry
• Natural Product Chemistry
• Botany

Background:

• Welwitschia mirabilis is a unique desert plant with potential medicinal properties.
• Stilbenoids are a class of natural compounds known for their diverse biological activities.

Purpose of the Study:

• To isolate and characterize novel compounds from Welwitschia mirabilis.
• To investigate the chemical constituents of the stem and root of Welwitschia mirabilis.

Main Methods:

• Extraction of plant material using methanol.
• Isolation of compounds using chromatographic techniques.
• Structure elucidation using spectroscopic methods (e.g., NMR, MS).

Main Results:

• Four new trimeric stilbene glucosides, designated mirabilosides C-F (compounds 1-4), were isolated.
• Three known stilbenoids, resveratrol (5), gnemonoside B (6), and gnetin G (7), were also identified.
• The chemical structures of the new compounds were fully determined through comprehensive spectroscopic analysis.

Conclusions:

• The study expands the knowledge of the phytochemical profile of Welwitschia mirabilis.
• The discovery of novel stilbene glucosides highlights the potential of this plant as a source of unique natural products.