title: The isolation and structure elucidation of new cassane diterpene-acids from Caesalpinia crista L. (Fabaceae), and review on the nomenclature of some Caesalpinia species.
abstract: New cassane diterpene-acids, neocaesalpins H and I, were isolated from the leaves of Caesalpinia crista (Fabaceae), and their structures were deduced on the basis of the spectroscopic and chemical basis. These compounds were characterized as having an alpha,beta-butenolide hemiacetal ring that is rare in nature. The lacking of 5-hydroxy group also distinguished neocaesalpins H and I from cassane diterpenes (caesalpins) occurring in other Caesalpinia species from the phytochemical viewpoint. The nomenclature of three Caesalpinia species was also reviewed, and it was found that some species belonging to the genus Caesalpinia are improperly named and should be changed to valid names.
authors.affiliation: Faculty of Pharmaceutical Sciences, Teikyo University, 1091-1 Suarashi, Sagamiko-machi, Tsukui-gun, Kanagawa 199-0195, Japan. tk-1948@pharm.teikyo-u.ac.jp
authors.forename: Takeshi
authors.initials: T
authors.lastname: Kinoshita
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Haga
authors.forename: Shintaro
authors.initials: S
authors.lastname: Narimatsu
authors.forename: Motoko
authors.initials: M
authors.lastname: Shimada
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Goda
mesh_terms: D029911:Caesalpinia / Q000145:classification*; D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification*; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification; D018515:Plant Leaves; D009626:Terminology as Topic
chemical_list: D004224:Diterpenes; D010936:Plant Extracts