Terpenoids and sterols from Lagerstroemia speciosa

Abstract

The leaves of Lagerstroemia speciosa afforded a new natural product, 31-norlargerenol acetate (4), along with known compounds 24-methylenecycloartanol acetate (1), its 31-nor analog (2), largerenol acetate (3), tinotufolins C (5) and D (6), lutein, phytol, sitosterol and sitosterol acetate. The structure of 4 was elucidated by 1D and 2D NMR and mass spectroscopy.

Keywords:

• Lagerstroemia speciosa
• Lythraceae
• 31-Norlargerenol acetate
• Terpenoid

Acknowledgements

The authors acknowledge research grants from the College Research Fund, College of Science, and the University Research Coordination Office of De La Salle University, Manila.