Unusual biflavonoids in the farinose exudate of Pentagramma triangularis

Three new and unusual biflavonoids, composed of a flavonol and dihydrochalcone nucleus through a methylene group, were isolated from the farinose exudate of Pentagramma triangularis in addition to a herbacetin dimethyl ester. These structures were determined by means of spectroscopic analysis.

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Bibliographic Details
Published in:Phytochemistry (Oxford) 1997-02, Vol.44 (4), p.705-710
Main Authors: Iinuma, Munekazu, Kakuto, Yuko, Tanida, Nobuko, Tanaka, Toshiyuki, Lang, Frank A.
Format: Article
Language:English
Subjects:
Biological and medical sciences
chemical constituents of plants
Chemical constitution
chemical structure
exudates
flavonoids
Fundamental and applied biological sciences. Psychology
Plant physiology and development
Pteridaceae
spectral analysis
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Description
Summary:Three new and unusual biflavonoids, composed of a flavonol and dihydrochalcone nucleus through a methylene group, were isolated from the farinose exudate of Pentagramma triangularis in addition to a herbacetin dimethyl ester. These structures were determined by means of spectroscopic analysis.
ISSN:0031-9422
1873-3700
DOI:10.1016/S0031-9422(96)00597-3