title: New C(28) steroidal glycosides from Tubocapsicum anomalum.
abstract: 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.
authors.affiliation: Medical and Pharmaceutical Sciences, Kumamoto University, Oe-Honmachi, Kumamoto, Japan.
authors.forename: Naoko
authors.initials: N
authors.lastname: Kiyota
authors.forename: Kazushi
authors.initials: K
authors.lastname: Shingu
authors.forename: Koki
authors.initials: K
authors.lastname: Yamaguchi
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Yoshitake
authors.forename: Kazunobu
authors.initials: K
authors.lastname: Harano
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Yoshimitsu
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Ikeda
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Nohara
mesh_terms: 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
chemical_list: D006027:Glycosides; D013256:Steroids