title: Tricalysiosides H-O: Ent-kaurane glucosides from the leaves of Tricalysia dubia.
abstract: Eight ent-kaurane glucosides, named tricalysiosides H-O, were isolated from Tricalysia dubia. Tricalysioside H possessed a hydroxyl group at the 1-position, to which the glucose moiety was attached. The structure was first elucidated by means of spectroscopic data analysis and finally confirmed by X-ray crystallography. Since acid hydrolysis of 1 gave D-glucose, the aglycone was proved to have an enantio-kaurane type skeleton. The structures of tricalysiosides I-O were mainly elucidated from analysis of spectroscopic evidence.
authors.affiliation: Department of Pharmacognosy, Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan.
authors.forename: Dong-Hui
authors.initials: DH
authors.lastname: He
authors.forename: Katsuyoshi
authors.initials: K
authors.lastname: Matsunami
authors.forename: Hideaki
authors.initials: H
authors.lastname: Otsuka
authors.forename: Takakazu
authors.initials: T
authors.lastname: Shinzato
authors.forename: Mitsunori
authors.initials: M
authors.lastname: Aramoto
authors.forename: Masahiko
authors.initials: M
authors.lastname: Bando
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Takeda
mesh_terms: D018360:Crystallography, X-Ray; D045786:Diterpenes, Kaurane / Q000737:chemistry*; D005960:Glucosides / Q000737:chemistry*; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry*; D019666:Rubiaceae / Q000737:chemistry*
chemical_list: D045786:Diterpenes, Kaurane; D005960:Glucosides