Goniolandrene A and B from Goniothalamus macrophyllus

Area of Science:

• Phytochemistry
• Natural Products Chemistry
• Pharmacology

Background:

• Goniothalamus macrophyllus is a plant species native to Malaysia.
• The roots of this plant are a potential source of bioactive compounds.

Purpose of the Study:

• To isolate and identify chemical constituents from the roots of Goniothalamus macrophyllus.
• To evaluate the cytotoxic activity of the isolated compounds.

Main Methods:

• Extraction of G. macrophyllus roots using aqueous methanol.
• Sequential partitioning of the extract with n-hexane, chloroform, and butanol.
• Purification of compounds using chromatographic techniques and structural elucidation.
• Cytotoxicity assay against P388 cell lines.

Main Results:

• Six compounds were isolated, including two novel compounds: goniolandrene-A (1) and goniolandrene-B (2).
• The absolute configuration of goniolandrene-B (2) was determined using circular dichroism.
• All isolated compounds exhibited cytotoxic activity against P388 cells, with IC50 values ranging from 0.42 to 160 μM.
• Goniothalamin (3) demonstrated the most potent cytotoxic effect with an IC50 of 0.42 μM.

Conclusions:

• The study successfully identified new compounds from Goniothalamus macrophyllus roots.
• The isolated compounds possess significant cytotoxic properties, indicating potential for further investigation in cancer research.