Indaquassin A and B: Quassinoids from Quassia indica

Two novel quassinoids, indaquassins A and B, were isolated from the bark of Quassia indica. Their structures were determined by various 2D NMR analyses. The absolute stereostructures of indaquassins A and B were unambiguously determined by the non-empirical exciton chirality circular dichroism metho...

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Published inPhytochemistry (Oxford) Vol. 34; no. 2; pp. 505 - 509
Main Authors Koike, Kazuo, Ohmoto, Taichi
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier Ltd 01.09.1993
Elsevier
Subjects
bark
Biological and medical sciences
chemical constituents of plants
Chemical constitution
Fundamental and applied biological sciences. Psychology
Indonesia
medicinal plants
molecular conformation
Plant physiology and development
Quassia
stereochemistry
Indonesia
quassinoid
indaquassin B
Simaroubaceae
indaquassin A
bark
Quassia indica
Molecular structure
Dicotyledones
Angiospermae
Bark
Polycyclic compound
Isolation
Lactone
Spermatophyta
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Summary:Two novel quassinoids, indaquassins A and B, were isolated from the bark of Quassia indica. Their structures were determined by various 2D NMR analyses. The absolute stereostructures of indaquassins A and B were unambiguously determined by the non-empirical exciton chirality circular dichroism method carried out on their p-bromobenzoate derivatives. Indaquassin B is reported here for the first time as a new class of rearranged C 20-quassinoid.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ISSN:0031-9422
1873-3700
DOI:10.1016/S0031-9422(05)80099-8