Xanthones from Garcinia mangostana (Guttiferae)

Area of Science:

• Natural Product Chemistry
• Medicinal Chemistry
• Entomology

Background:

• Garcinia mangostana is a tropical fruit tree with a history of traditional medicinal uses.
• Xanthones are a class of compounds found in plants, known for diverse biological activities.
• Prenylated xanthones are a subclass with potential pharmacological properties.

Purpose of the Study:

• To isolate and characterize xanthone compounds from the stem of Garcinia mangostana.
• To evaluate the larvicidal activity of these isolated compounds and crude extracts against Aedes aegypti.

Main Methods:

• Phytochemical investigation of Garcinia mangostana stem extracts.
• Structure elucidation using spectroscopic techniques including 1H NMR, 13C NMR, and Mass Spectrometry (MS).
• Bioassay screening for larvicidal activity against Aedes aegypti larvae.

Main Results:

• Isolation of one new xanthone, mangosharin, and six known prenylated xanthones.
• Structural confirmation of all seven compounds through spectroscopic analysis and comparison with literature.
• Crude extracts exhibited potent larvicidal toxicity against Aedes aegypti.

Conclusions:

• The study successfully identified novel and known xanthones from Garcinia mangostana.
• The findings highlight the potential of Garcinia mangostana stem constituents as larvicidal agents.
• This research provides new bioassay data for Garcinia mangostana extracts, previously unreported.