title: [Anthraquinones and triterpenoids from roots of Knoxia roxburghii].
abstract: Nine compounds were isolated from an ethanol extract of the roots of K. roxburghii by using a combination of various chromatographic techniques including column chromatography over silica gel, MCI gel, Sephadex LH-20, and reversed-phase HPLC. On the basis of physical-chemical properties and spectroscopic data analysis, their structures were identified as munjistin (1), 1-methoxy-3,6-dihydroxy-2-hydroxymethyl-9,10-anthraquinone (2), 1,2,3-trihydroxy-9,10-anthraquinone (3), arjunolic acid (4), hyptatic acid-A (5), hyptatic acid-B (6), 2α,3β,24-trihydroxyurs-12-en-28-oic acid (7), 2α,3β,23-trihydroxyurs-12-en-28-oic acid (8), and daucosterol (9). Compounds 1-9 were obtained from this genus for the first time.
authors.forename: Yi-Lang
authors.initials: YL
authors.lastname: Hong
authors.forename: Li
authors.initials: L
authors.lastname: Ma
authors.forename: Yuan-Fang
authors.initials: YF
authors.lastname: Wang
authors.forename: Ju-Feng
authors.initials: JF
authors.lastname: Sun
authors.forename: Gui-Ge
authors.initials: GG
authors.lastname: Hou
authors.forename: Feng
authors.initials: F
authors.lastname: Zhao
authors.forename: Jing-Tian
authors.initials: JT
authors.lastname: Han
authors.forename: Chun-Hua
authors.initials: CH
authors.lastname: Wang
mesh_terms: D000880:Anthraquinones / Q000737:chemistry / Q000302:isolation & purification*; D019666:Rubiaceae / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D000880:Anthraquinones; D014315:Triterpenes