Tirucallane-type triterpenoids from Dysoxylum lenticellatum

Area of Science:

• Natural Product Chemistry
• Phytochemistry
• Organic Chemistry

Background:

• Dysoxylum lenticellatum is a plant species known to produce diverse secondary metabolites.
• Triterpenoids and alkaloids are classes of natural compounds with a wide range of biological activities.

Purpose of the Study:

• To isolate and characterize new chemical constituents from Dysoxylum lenticellatum.
• To investigate the biological activity of the isolated compounds.

Main Methods:

• Isolation of compounds using chromatographic techniques.
• Structure elucidation through extensive spectroscopic methods (NMR, MS).
• Confirmation of structures by single-crystal X-ray diffraction.

Main Results:

• Ten new tirucallane-type triterpenoids (dysolenticins A-J) were identified, including a rearranged skeleton and a trinortriterpenoid.
• Seven known analogues were also isolated.
• Dysolenticin J exhibited significant vasodilative effects on rat aortic rings (87.4% diastolic degree at 10 μg/mL).

Conclusions:

• The chemical investigation of Dysoxylum lenticellatum yielded novel triterpenoids and an alkaloid.
• Dysolenticin J possesses notable vasodilative properties, suggesting potential pharmacological relevance.