12-Keto steroidal glycosides from the caudex of Yucca gloriosa.
Eight new steroidal glycosides, tentatively named YS-VI, -VII, -VIII, -IX, -X, -XI, -XII and -XIII were isolated from the caudex of Yucca gloriosa along with P-1, YG-2 and YG-3 previously obtained from flowers. The structures of five of these compounds were elucidated as mexogenin 3-O-beta-D-glucopyranosyl-(1----2)-beta-D-galactopyranoside (YS-VI), gloriogenin 3-O-beta-D-glucopyranosyl-(1----2)-[beta- D-glucopyranosyl-(1----3)]-beta-D-glucopyranoside (YS-VII) and 3-O-beta-D-glucopyranosyl-(1----2)-[beta-D-glucopyranosyl)-(1----3)]- beta-D-galactopyranoside (YS-VIII), manogenin 3-O-beta-lycotetraoside (YS-IX) and 3-O-alpha-L-rhamnopyranosyl-beta-lycotetraoside (YS-X), respectively, on the basis of chemical and spectral evidence.
Nakano
K
K
Faculty of Pharmaceutical Sciences, Tokushima University, Japan.
Midzuta
Y
Y
Hara
Y
Y
Murakami
K
K
Takaishi
Y
Y
Tomimatsu
T
T
D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D015394:Molecular Structure; D010840:Phytosterols / Q000302:isolation & purification*; D010944:Plants / Q000032:analysis*; D012503:Saponins / Q000302:isolation & purification*
D010840:Phytosterols; D012503:Saponins