New C(28) steroidal glycosides from Tubocapsicum anomalum.
Three new C(28) steroidal glycosides, isotubocaposides A (1), B (2), and C (3), were isolated from the fruits of Tubocapsicum anomalum MAKINO. Their chemical structures were elucidated on the basis of spectroscopic and X-ray diffraction analysis of p-bromobenzoyl derivative (5) of isotubocaposigenin (4), the sapogenol derivative of these three glycosides. Isotubocaposides have the structural peculiarity of an unusual side chain carrying a C-21 bound to C-24 on the lactone ring.
Kiyota
Naoko
N
Medical and Pharmaceutical Sciences, Kumamoto University, Oe-Honmachi, Kumamoto, Japan.
Shingu
Kazushi
K
Yamaguchi
Koki
K
Yoshitake
Yasuyuki
Y
Harano
Kazunobu
K
Yoshimitsu
Hitoshi
H
Ikeda
Tsuyoshi
T
Nohara
Toshihiro
T
D002240:Carbohydrate Sequence; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008969:Molecular Sequence Data; D019657:Solanaceae / Q000737:chemistry*; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification*; D014961:X-Ray Diffraction
D006027:Glycosides; D013256:Steroids