title: Monoterpene constituents from Cistanche tubulosa--chemical structures of kankanosides A-E and kankanol-.
abstract: Four new iridoid glycosides, kankanosides A (1), B (2), C (3), and D (4), a chlorinated iridoid, kankanol (5), and an acyclic monoterpene glycoside, kankanoside E (6), were isolated from the methanolic extract of dried stems of Cistanche tubulosa (SCHRENK) R. WIGHT (Orobanchaceae) together with 16 known compounds. The structures of these new compounds (1-6) were determined on the basis of the chemical and physicochemical evidence.
authors.affiliation: Kyoto Pharmaceutical University, Misasagi, Yamashina-ku, Kyoto 607-8412, Japan.
authors.forename: Haihui
authors.initials: H
authors.lastname: Xie
authors.forename: Toshio
authors.initials: T
authors.lastname: Morikawa
authors.forename: Hisashi
authors.initials: H
authors.lastname: Matsuda
authors.forename: Seikou
authors.initials: S
authors.lastname: Nakamura
authors.forename: Osamu
authors.initials: O
authors.lastname: Muraoka
authors.forename: Masayuki
authors.initials: M
authors.lastname: Yoshikawa
mesh_terms: D002240:Carbohydrate Sequence; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002851:Chromatography, High Pressure Liquid; D031671:Cistanche / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D039823:Iridoids / Q000737:chemistry*; D039821:Monoterpenes / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D001617:beta-Glucosidase / Q000737:chemistry
chemical_list: D039823:Iridoids; D039821:Monoterpenes; D010936:Plant Extracts; C511331:kankanol; D001617:beta-Glucosidase