Phlorotannins from the brown alga Cystophora torulosa

A number of phlorotannins were isolated at their peracetyl derivatives and identified by means of spectral analysis. The new compounds belong to the class of hydroxylated branched fucophlorethols and bisfucophlorethols lacking a 1,2,3-triphenoxy-5-acetoxybenzene moiety. A total of 33 phlorotannins h...

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Bibliographic Details
Published in:Phytochemistry (Oxford) 1997-10, Vol.46 (4), p.735-740
Main Authors: Glombitza, Karl-Werner, Hauperich, Sabine
Format: Article
Language:English
Subjects:
Biological and medical sciences
chemical composition
Chemical constitution
chemical structure
Cystophora torulosa
fucols
fucophlorethols
Fundamental and applied biological sciences. Psychology
hydroxyfucophlorethols
Marine
nuclear magnetic resonance spectroscopy
Phaeophyceae
Phaeophycophyta
Phaeophyta
phlorotannins
Plant physiology and development
spectral analysis
structural elucidation
tannins
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Summary:A number of phlorotannins were isolated at their peracetyl derivatives and identified by means of spectral analysis. The new compounds belong to the class of hydroxylated branched fucophlorethols and bisfucophlorethols lacking a 1,2,3-triphenoxy-5-acetoxybenzene moiety. A total of 33 phlorotannins had been isolated from Cystophora torulosa, 20 of which have already been described. In this publication the structures of the remaining 13 compounds are described. Whereas the former substances belong to the group of fucols, branched fucophlorethols and difucol-containing fucophlorethols, it is shown here that five of the remaining 13 compounds are members of two entirely new phlorotannin subclasses, namely hydroxylated branched fucophlorethols and bis-fucophlorethols lacking a 1,2,3-triphenoxy-5-acetoxybenzene moiety. © 1997 Elsevier Science Ltd
ISSN:0031-9422
1873-3700
DOI:10.1016/S0031-9422(97)00327-0