title: New C(28) steroidal glycosides from Tubocapsicum anomalum.
abstract: Two new C(28) steroidal glycosides, tuboanosides A (1) and B (2), were isolated from the fruit of Tubocapsicum anomalum MAKINO. Their chemical structures were elucidated on the basis of spectroscopic and X-ray diffraction analysis of the p-bromobenzoyl derivative (4) of tuboanosigenin (3), the sapogenol derivative of these two glycosides. Tuboanosides have the structural peculiarity of an unusual side chain carrying an unusual linkage with a C-21 bound to C-25 on the lactone ring.
authors.affiliation: Faculty of Medical and Pharmaceutical Sciences, Kumamoto University, 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: Hiroyuki
authors.initials: H
authors.lastname: Miyashita
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Ikeda
authors.forename: Chie
authors.initials: C
authors.lastname: Tagawa
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Nohara
mesh_terms: D005638:Fruit / Q000737:chemistry; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D019657:Solanaceae / Q000737:chemistry*; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification*; D014961:X-Ray Diffraction
chemical_list: D006027:Glycosides; D013256:Steroids