Revised Structures of Cangorosins, Triterpene Dimers from Maytenus ilicifolia

Structures of four triterpene dimers, cangorosins, isolated from Maytenus ilicifolia Mart., were previously reported to consist of two triterpene units joined by an ether bond formed between the two A rings. On the basis of detailed studies of their chemical and spectroscopic data, including inverse...

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Bibliographic Details
Published in:Journal of natural products (Washington, D.C.) D.C.), 1997-02, Vol.60 (2), p.111-115
Main Authors: Shirota, Osamu, Morita, Hiroshi, Takeya, Koichi, Itokawa, Hideji
Format: Article
Language:English
Subjects:
BARK
Biological and medical sciences
CELASTRACEAE
CHEMICAL COMPOSITION
CHEMICAL STRUCTURE
CHEMISTRY
CHIMIE
COMPOSICION QUIMICA
COMPOSITION CHIMIQUE
CORTEZA
ECORCE
ESPECTROMETRIA
ESTRUCTURA QUIMICA
General pharmacology
Medical sciences
PARAGUAY
Pharmacognosy. Homeopathy. Health food
Pharmacology. Drug treatments
QUIMICA
RACINE
RAICES
ROOTS
SPECTRAL ANALYSIS
SPECTROMETRIE
SPECTROMETRY
STEREOCHEMISTRY
STRUCTURE CHIMIQUE
TRITERPENOIDE
TRITERPENOIDOS
TRITERPENOIDS
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Summary:Structures of four triterpene dimers, cangorosins, isolated from Maytenus ilicifolia Mart., were previously reported to consist of two triterpene units joined by an ether bond formed between the two A rings. On the basis of detailed studies of their chemical and spectroscopic data, including inverse-detected 2D-NMR data, and comparisons with other known triterpene dimers, the structures of the cangorosins have been revised to triterpene dimers linked by two ether bridges between the two A rings for cangorosin B and between the A and the B rings for the cangorosin A series (cangorosin A, isocangorosin A, and 6‘,7‘-dihydroisocangorosin A).
ISSN:0163-3864
1520-6025
DOI:10.1021/np9604487