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Clionasterol, a Triterpenoid from the Kenyan Marine Green Macroalga Halimeda macroloba


Thomas Dzeha
Marcel Jaspars
Jioji Tabudravu

Abstract

Keywords: clionasterol, macroalga, Halimeda macroloba, spectroscopy, bioprospecting, Kenya


The triterpenoid clionasterol (1), a 29 carbon structure compound was isolated from the less polar extract (20% EtOAc in hexanes) of the green alga Halimeda macroloba collected at Shimoni near Mombasa, Kenya. The structure and relative stereochemistry of this compound was elucidated by spectroscopic data, mainly NMR and mass spectrometry. This metabolite was inactive against DLD-1 cells on the MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay. Further experiments on mosquito larvae and brine shrimp lethality confirmed this result.


Western Indian Ocean Journal of Marine Sciences Vol.2(2) 2003: 157-161

Journal Identifiers


eISSN: 2683-6416
print ISSN: 0856-860X