Two New Sesterterpene Tetronic Acids from the Marine Sponge Ircinia oros

Two new sesterterpene tetronic acids, (8Z,13Z,18S,20Z)-strobilinin (1) and (7E,12Z,18S,20Z)-variabilin (3), together with the known compounds (7E,12E,18S,20Z)-variabilin (5), (7E,13Z,18S,20Z)-variabilin (7), and (7Z,12Z,20Z)-variabilin (9), have been isolated from the sponge Ircinia oros as their 22...

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Bibliographic Details
Published in:Journal of natural products (Washington, D.C.) D.C.), 1997-08, Vol.60 (8), p.832-835
Main Authors: Höller, Ulrich, König, Gabriele M, Wright, Anthony D
Format: Article
Language:English
Subjects:
Analytical, structural and metabolic biochemistry
Biological and medical sciences
CHEMICAL COMPOSITION
CHEMICAL STRUCTURE
COMPOSICION QUIMICA
COMPOSITION CHIMIQUE
ESPECTROMETRIA
ESTRUCTURA QUIMICA
Fundamental and applied biological sciences. Psychology
Ircinia oros
MALTA
MALTE
Marine
METABOLITE
METABOLITES
METABOLITOS
Other biological molecules
PARAZOA
Porifera
SECONDARY METABOLITES
SPECTRAL ANALYSIS
SPECTROMETRIE
SPECTROMETRY
STRUCTURE CHIMIQUE
Terpenes, steroids. Hormones
TERPENOIDE
TERPENOIDOS
TERPENOIDS
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Summary:Two new sesterterpene tetronic acids, (8Z,13Z,18S,20Z)-strobilinin (1) and (7E,12Z,18S,20Z)-variabilin (3), together with the known compounds (7E,12E,18S,20Z)-variabilin (5), (7E,13Z,18S,20Z)-variabilin (7), and (7Z,12Z,20Z)-variabilin (9), have been isolated from the sponge Ircinia oros as their 22-O-methyl derivatives 2, 4, 6, 8, and 10. The structures of all compounds were determined by spectroscopic methods, mainly 1D and 2D NMR methodologies.
ISSN:0163-3864
1520-6025
DOI:10.1021/np970170y