Three new bis-styryllactones from Goniothalamus cheliensis

Area of Science:

• Natural Product Chemistry
• Phytochemistry
• Organic Chemistry

Background:

• Goniothalamus species are known sources of bioactive compounds.
• Bis-styryllactones represent a class of natural products with diverse biological activities.

Purpose of the Study:

• To isolate and characterize new bis-styryllactone analogues from Goniothalamus cheliensis.
• To elucidate the chemical structures of novel compounds using spectroscopic techniques.

Main Methods:

• Isolation of compounds from root bark extracts.
• Structure elucidation using High-Resolution Electrospray Ionization Mass Spectrometry (HR-ESI-MS).
• Comprehensive 2D Nuclear Magnetic Resonance (2D NMR) spectroscopy, including HSQC, HMBC, (1)H-(1)H COSY, and ROESY experiments.

Main Results:

• Three new bis-styryllactone analogues, designated goniolactones G-I (compounds 1-3), were successfully isolated.
• The structures of these novel compounds were definitively established through detailed spectroscopic analysis.

Conclusions:

• The study expands the known chemical diversity of bis-styryllactones from Goniothalamus cheliensis.
• The identified compounds represent potential leads for further pharmacological investigation.