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Titolo:
THE STRUCTURE OF RUBICUNOSIDE A
Autore:
TAN NH; ZHAO SX; ZHOU J; CHEN CX;
Indirizzi:
CHINA PHARMACEUT UNIV,DEPT PHYTOCHEM NANJING 210009 PEOPLES R CHINA CHINESE ACAD SCI,KUNMING INST BOT,PHYTOCHEM LAB KUNMING 650204 PEOPLES R CHINA
Titolo Testata:
Huaxue xuebao
fascicolo: 10, volume: 53, anno: 1995,
pagine: 1024 - 1033
SICI:
0567-7351(1995)53:10<1024:TSORA>2.0.ZU;2-M
Fonte:
ISI
Lingua:
CHI
Soggetto:
OLEANOLIC ACID; CONSTITUENTS; GLYCOSIDES; SEED;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
6
Recensione:
Indirizzi per estratti:
Citazione:
N.H. Tan et al., "THE STRUCTURE OF RUBICUNOSIDE A", Huaxue xuebao, 53(10), 1995, pp. 1024-1033

Abstract

A new acetylated triterpenoid saponin, rubicunoside A (1), was isolated from the roots of Silene, rubicunda Franch. It was characterized onthe basis of extensive chemical, enzymic, and spectral methods as 3-O-beta-D-galactopyranosyl-(1 --> 2)-[beta-D-xylopyranosyl-(1 --> 3)]-beta-D-glucuronopyranosyl quillaic acid 28-O-beta-D-xylopyranosyl-(1 -->3)-beta-D-xylopyranosyl-(1 --> 4)-alpha-L-rhamnopyranosyl-(1 --> 4)-[2''-OAc-beta-D-quinovopyranosyl-(1 --> 2)]-[3'-OAc]-beta-D-fucopyranoside (1). During the enzymic cleavage with glycyrrhizinic acid hydrolase, we unexpectedly found two new characteristics of the hydrolase. It can selectively hydrolyzed not only 28-O-monoprosapogenins, but also the acetyl group in the sugar moieties of the prosapogenins. The enzymic cleavage method with glycyrrhizinic acid hydrolase providing selectivly 3-oligosaccharides and 28-O-glucosides and partial methanolysis providing selectively 28-oligosaccharides from 3,28-O-bisglucosides wereeffective for the structure elucidation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 10:13:22