Steroidal saponins from Tribulus terrestris.
Three new steroidal saponins were isolated from the fruits of Tribulus terrestris, and their structures were elucidated as (25R,S)-5 alpha-spirostane-12-one-3 beta-ol-3-O-beta-xylopyranosyl(1-->2)- [beta-xylopyranosyl(1-->3)]-beta-glucopyranosyl(1-->4)-[alpha-rhamno- pyranosyl(1-->2)]-beta-galactopyranoside; 26-O-beta-glucopyranosyl-(25S)-5 alpha-furostane-12-one-3 beta,22 alpha,26-triol-3-O-beta-glucopyranosyl(1-->2)-beta-galactopyranoside; 26-O-beta-glucopyranosyl-(25S)-5 alpha-furostane-12-one-3 beta,22 alpha,26-triol-3-O-beta-glucopyranosyl(1-->4)-[alpha- rhamnopyranosyl(1-->2)]-beta-galactopyranoside, respectively, by spectroscopic analysis and color reaction.
Cai
L
L
Wu
Y
Y
Zhang
J
J
Pei
F
F
Xu
Y
Y
Xie
S
S
Xu
D
D
D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D013055:Spectrophotometry, Infrared; D013057:Spectrum Analysis; D013150:Spirostans; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification*
C424624:26-O-beta-glucopyranosyl-(25S)-5alpha-furostane-12-one-3beta,22alpha,26-triol-3-O-beta-glucopyranosyl(1-4)-(alpha-rhamnopyranosyl(1-2))-beta-galactopyranoside; C424623:26-O-beta-glucopyranosyl-5alpha-furostane-12-one-3beta,22alpha,26-triol-3-O-beta-glucopyranosyl(1-2)-beta-galactopyranoside; C424622:5alpha-spirostane-12-one-3beta-ol-3-O-beta-xylopyranosyl(1-2)- (beta-xylopyranosyl(1-3))-beta-glucopyranosyl(1-4)-(alpha-rhamno- pyranosyl(1-2))-beta-galactopyranoside; D012503:Saponins; D013150:Spirostans; D013256:Steroids