Secondary metabolites from Tectona philippinensis.

Area of Science:

• Phytochemistry
• Pharmacology
• Ethnobotany

Background:

• Tectona philippinensis is an endangered, endemic Philippine medicinal plant.
• Traditional uses suggest potential therapeutic properties.
• Understanding its chemical constituents is crucial for conservation and drug discovery.

Purpose of the Study:

• To isolate and identify chemical compounds from the leaves of Tectona philippinensis.
• To evaluate the antimicrobial and antifungal activities of isolated compounds.
• To contribute to the scientific understanding of this endangered medicinal plant.

Main Methods:

• Air-dried leaves of Tectona philippinensis were subjected to phytochemical analysis.
• Compounds were isolated using standard chromatographic techniques.
• Antimicrobial and antifungal assays were performed on isolated compounds against selected microorganisms.

Main Results:

• Five compounds were isolated: 5-hydroxy-3,7,4'-trimethoxyflavone (1), 5,4'-dihydroxy-3,7-dimethoxyflavone (2), squalene (3), a mixture of lupeol (4a) and beta-amyrin (4b), and chlorophyllide a (5).
• Compounds 1 and 2 exhibited low antifungal activity against Candida albicans and Trichophyton mentagrophytes.
• Compound 1 demonstrated low antibacterial activity against Escherichia coli and Pseudomonas aeruginosa.

Conclusions:

• Tectona philippinensis leaves contain several bioactive compounds, including two flavones.
• The isolated flavones possess limited antimicrobial and antifungal properties.
• Further research may explore other potential applications or synergistic effects of these compounds.