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Steroids ; 70(14): 954-9, 2005 Dec 15.
Artículo en Inglés | MEDLINE | ID: mdl-16154169

RESUMEN

Chemical investigation of the dichloromethane extract of the Red Sea marine sponge Lamellodysidea herbacea led to the isolation of four novel polyhydroxysteroids: cholesta-8-en-3beta,5alpha,6alpha,25-tetrol (1), cholesta-8(14)-en-3beta,5alpha,6alpha,25-tetrol (2), cholesta-8,24-dien-3beta,5alpha,6alpha-triol (3), and cholesta-8(14),24-dien-3beta,5alpha,6alpha-triol (4). Their structures were identified through 1D and 2D NMR studies. Relative stereochemistries were established by analysis of chemical shifts, coupling constants, and NOESY correlations. Compounds 3-4 showed antifungal activity against Candida tropicalis, with an inhibition diameter of 13 and 11 mm at 10 microg/disc, respectively.


Asunto(s)
Hidroxiesteroides/química , Hidroxiesteroides/aislamiento & purificación , Poríferos/química , Animales , Colestadienos/análisis , Colestadienos/química , Hidroxiesteroides/análisis , Océano Índico , Espectroscopía de Resonancia Magnética
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