Diverse acyclic diterpene derivatives from Aphanamixis sinensis

Area of Science:

• Natural Product Chemistry
• Organic Chemistry
• Pharmacology

Background:

• Aphanamixis sinensis is a plant source of bioactive compounds.
• Diterpenes represent a diverse class of natural products with various biological activities.
• Understanding the chemical constituents of medicinal plants is crucial for drug discovery.

Purpose of the Study:

• To isolate and characterize new diterpene derivatives from Aphanamixis sinensis.
• To investigate the potential anti-inflammatory activity of the isolated compounds.

Main Methods:

• Phytochemical investigation of leaves and twigs of Aphanamixis sinensis.
• Structure elucidation using Nuclear Magnetic Resonance (NMR) spectroscopy and Electronic Circular Dichroism (ECD) data analysis.
• Assessment of nitric oxide (NO) production inhibitory effects in lipopolysaccharide (LPS)-induced RAW 264.7 cells.

Main Results:

• Fifteen diterpene derivatives were isolated, including seven novel compounds named sinensisins A-G.
• The diverse carbon skeletons included meroditerpenoids, acyclic diterpenes, and norditerpenoids.
• Compounds 3, 5, and 6 exhibited inhibitory effects on nitric oxide production.

Conclusions:

• The study successfully identified new diterpene derivatives from Aphanamixis sinensis.
• Compounds 3, 5, and 6 show potential as anti-inflammatory agents by inhibiting nitric oxide production.
• Further research is warranted to explore the therapeutic potential of these compounds.