Two new steroidal saponins from the biotransformation product of the rhizomes of Dioscorea nipponica.
J Asian Nat Prod Res
; 14(7): 640-6, 2012.
Article
em En
| MEDLINE
| ID: mdl-22582713
ABSTRACT
Two new steroidal saponins, dioscins E (1) and F (2), along with nine known steroidal saponins, were isolated from the biotransformation product of the rhizomes of Dioscorea nipponica using Aspergillus oryzae. The structures of new compounds were established as 25(R)-spirost-5-en-21ß-methyl-3ß-ol-3-O-α-L-rhamnopyranosyl-(1 â 4)-ß-D-glucopyranoside (1) and (25R)-spirost-5-en-3ß-ol-7-one 3-O-α-L-rhamnopyranosyl-(1 â 4)-ß-D-glucopyranoside (2) by detailed spectroscopic analyses including 1D and 2D NMR spectral data ((1)H-(1)H COSY, HSQC, and HMBC) and MS spectrometry.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Saponinas
/
Dioscorea
/
Diosgenina
Idioma:
En
Revista:
J Asian Nat Prod Res
Assunto da revista:
BOTANICA
/
QUIMICA
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
China