Chantriolide C, a new withanolide glucoside and a new spirostanol saponin from the rhizomes of Tacca chantrieri.
Chem Pharm Bull (Tokyo)
; 57(10): 1126-8, 2009 Oct.
Article
en En
| MEDLINE
| ID: mdl-19801872
ABSTRACT
A new withanolide, chantriolide C (1) and a new spirostanol saponin, chantrieroside A (2) were isolated from the rhizomes of Tacca chantrieri, together with another five known steroidal compounds. Their structures were established as (22R)-1alpha,12alpha-diacetoxy-2alpha,3alpha;6alpha,7alpha-diepoxy-27-[(beta-D-glucopyranosyl)oxy]-5alpha-hydroxywith-24-enolide (1) and (25R)-spirost-5-en-3-yl-O-alpha-L-rhamnopyranosyl-(1-->2)-O-[O-beta-D-glucopyranosyl-(1-->4)-alpha-L-rhamnopyranosyl-(1-->3)]-beta-D-glucopyranoside (2). The structures of the new saponins were determined by detailed analysis of their 1 dimensional (1D) and 2D NMR spectra, and chemical evidences.
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Banco de datos:
MEDLINE
Asunto principal:
Saponinas
/
Espirostanos
/
Dioscoreaceae
/
Glucósidos
Idioma:
En
Año:
2009
Tipo del documento:
Article