A new dimeric naphthoquinone from Diospyros anisandra

Area of Science:

• Phytochemistry
• Natural Products Chemistry
• Organic Chemistry

Background:

• Diospyros anisandra is a plant species with potential medicinal properties.
• Natural products research is crucial for discovering new bioactive compounds.
• Plumbagin dimers represent a class of compounds with diverse biological activities.

Purpose of the Study:

• To isolate and characterize chemical constituents from the stem bark of Diospyros anisandra.
• To identify novel compounds and known metabolites from the plant extract.
• To contribute to the phytochemical knowledge of the Diospyros genus.

Main Methods:

• Extraction of plant material using hexane solvent.
• Isolation of compounds using chromatographic techniques.
• Structure elucidation using spectroscopic methods including IR, UV, MS, and NMR (1D and 2D).

Main Results:

• Isolation of a new plumbagin dimer, epoxide of zeylanone.
• Identification of 14 known compounds: seven naphthoquinones, four triterpenoids, and three sesquiterpenoids.
• Confirmation of compound structures through comprehensive spectroscopic analysis and literature comparison.

Conclusions:

• The hexane extract of Diospyros anisandra stem bark is a rich source of diverse phytochemicals.
• Epoxide of zeylanone represents a novel addition to the known plumbagin dimers.
• The identified compounds provide a basis for further investigation into the biological activities of Diospyros anisandra.