Polyhydroxylated spirostanol saponins from the tubers of Dioscorea polygonoides.
Three new polyhydroxylated spirostanol saponins (1-3) were isolated from the tubers of Dioscorea polygonoides. The structures of these new compounds were determined on the basis of extensive spectroscopic analysis and the results of acid or enzymatic hydrolysis as (23S,24R,25S)-23,24-dihydroxyspirost-5-en-3beta-yl O-alpha-L-rhamnopyranosyl-(1-->2)-beta-D-glucopyranoside (1), (23S,25R)-12alpha,17alpha,23-trihydroxyspirost-5-en-3beta-yl O-alpha-L-rhamnopyranosyl-(1-->2)-beta-D-glucopyranoside (2), and (23S,25R)-14alpha,17alpha,23-trihydroxyspirost-5-en-3beta-yl O-alpha-L-rhamnopyranosyl-(1-->2)-beta-D-glucopyranoside (3), respectively.
Osorio
Jaime Niño
JN
Grupo de Biotecnología-Productos Naturales, Escuela de Tecnología Química, Universidad Tecnológica de Pereira, La Julita, A. A. 97 Pereira, Colombia.
Mosquera Martinez
Oscar M
OM
Correa Navarro
Yaned M
YM
Watanabe
Kazuki
K
Sakagami
Hiroshi
H
Mimaki
Yoshihiro
Y
D027742:Dioscorea / Q000737:chemistry*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D013150:Spirostans / Q000737:chemistry / Q000302:isolation & purification*; D013237:Stereoisomerism
C503030:(23S,24R,25S)-23,24-dihydroxyspirost-5-en-3beta-yl O-alpha-L-rhamnopyranosyl-(1-2)-beta-D-glucopyranoside; C503032:(23S,25R)-12alpha,17alpha,23-trihydroxyspirost-5-en-3beta-yl O-alpha-L-rhamnopyranosyl-(1-2)-beta-D-glucopyranoside; C503031:(23S,25R)-14alpha,17alpha,23-trihydroxyspirost-5-en-3beta-yl O-alpha-L-rhamnopyranosyl-(12)-beta-D-glucopyranoside; D012503:Saponins; D013150:Spirostans