Sesquiterpenoids from Bombax malabaricum.

Area of Science:

• Phytochemistry
• Natural Product Chemistry
• Medicinal Chemistry

Background:

• Bombax malabaricum (Malabar silk-cotton tree) is a plant with traditional medicinal uses.
• Sesquiterpenoids are a diverse class of natural products with a wide range of biological activities.
• Cadinane sesquiterpenoids are a specific structural subclass found in various plants.

Purpose of the Study:

• To isolate and characterize the chemical constituents from the roots of Bombax malabaricum.
• To evaluate the isolated compounds for potential anticancer activity against a human gastrointestinal cancer cell line.

Main Methods:

• Phytochemical investigation involving extraction and isolation techniques.
• Structure elucidation using spectroscopic methods (e.g., NMR, MS) and literature comparison.
• In vitro anticancer activity screening using the HGC-27 cell line.

Main Results:

• Nine cadinane sesquiterpenoids were isolated from Bombax malabaricum roots.
• Five new compounds, designated bombamalones A-D (1-4) and bombamaloside (5), were identified.
• Four known compounds (6-9) were also isolated and characterized.
• None of the tested compounds (1-9) exhibited significant inhibitory activity against the HGC-27 cell line (IC(50) >10 microM).

Conclusions:

• The phytochemical analysis of Bombax malabaricum roots yielded a series of cadinane sesquiterpenoids.
• The isolated compounds did not demonstrate cytotoxic effects on the HGC-27 human gastrointestinal cancer cell line at the tested concentrations.