A NEW TRITERPENE SAPONIN FROM HETEROPAPPUS-BIENNIS WITH AN UNUSUAL CARBOHYDRATE CHAIN

Authors
BADER G DANZANDARJAA T HILLER K REZNICEK G JURENITSCH J GOLLY M SCHRODER H SCHUBERTZSILAVECZ M HASLINGER E
Citation
G. Bader et al., A NEW TRITERPENE SAPONIN FROM HETEROPAPPUS-BIENNIS WITH AN UNUSUAL CARBOHYDRATE CHAIN, Helvetica Chimica Acta, 77(7), 1994, pp. 1861-1868
Citations number
15
Categorie Soggetti
Chemistry
Journal title
Helvetica Chimica Acta → ACNP
ISSN journal
0018019X
Volume
77
Issue
7
Year of publication
1994
Pages
1861 - 1868
Database
ISI
SICI code
0018-019X(1994)77:7<1861:ANTSFH>2.0.ZU;2-5
Abstract
A new saponin, beta-D-xylopyranosyl(1-->3)]-beta-D-glucopyranosyl arju nolate (1) was isolated from the flowers of Heteropappus biennis (LDB. ) TAMAMSCH. The structure was established mainly by a combination of 1 D selective and 2D NMR techniques like COSY, TOCSY, ROESY, HMQC, and H MBC. Molecular-modelling calculations showed that the oligosaccharide chain is rather rigid. Six minimum structures are discussed.