Antisweet natural products. XII. Structures of sitakisosides XI-XX from Stephanotis lutchuensis Koidz. var. japonica.
From the fresh stem of Stephanotis lutchuensis var. japonica, ten new oleanane-type triterpenoid glycosides, named sitakisosides XI-XX (1-10), were isolated. Their structures were determined on the basis of spectroscopic data and chemical evidence. The results show that all have a 3-O-beta-D-xylopyranosyl(1 --> 6)-beta-D-glucopyranosyl(1 --> 6)- beta-D-glucopyranosyl moiety and the aglycones of sitakisosides XI-XV, XVI and XVII, XVIII and XIX, and XX are sitakisogenin, chichipegenin, marsglobiferin and longispinogenin, respectively. Sitakisosides XI-XIII, XVI and XVIII, having an acyl group, showed antisweet activity.
Yoshikawa
K
K
Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Japan.
Mizutani
A
A
Kan
Y
Y
Arihara
S
S
D002240:Carbohydrate Sequence; D005421:Flavoring Agents / Q000008:administration & dosage / Q000737:chemistry*; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D010936:Plant Extracts / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D010944:Plants / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D013395:Sucrose / Q000008:administration & dosage / Q000037:antagonists & inhibitors; D013649:Taste / Q000187:drug effects
D005421:Flavoring Agents; D010936:Plant Extracts; D012503:Saponins; D013395:Sucrose