title: Preparative isolation of osthol and xanthotoxol from Common Cnidium Fruit (Chinese traditional herb) using stepwise elution by high-speed counter-current chromatography.
abstract: Preparative high-speed counter-current chromatography (HSCCC) was successfully used for isolation and purification of osthol and xanthotoxol from Cnidium monnieri (L.) Cusson (Common Cnidium Fruit) using stepwise elution with a pair of two-phase solvent systems composed of n-hexane-ethyl acetate-methanol-water at (1:1:1:1, v/v), and (5:5:6:4, v/v), which had been selected by analytical high-speed counter-current chromatography. Using a preparative unit of the HSCCC centrifuge, about a 308 mg amount of the crude extract was separated, yielding 88.3 mg of osthol and 19.4 mg of xanthotoxol at a high purity of over 98%.
authors.affiliation: Beijing Research Centerfor Separation and Purification Technologies of Natural Products, Beijing Institute of New Technology Application, Beijing 100035, China.
authors.forename: Yun
authors.initials: Y
authors.lastname: Wei
authors.forename: Tianyou
authors.initials: T
authors.lastname: Zhang
authors.forename: Yoichiro
authors.initials: Y
authors.lastname: Ito
mesh_terms: D031048:Cnidium / Q000737:chemistry*; D003374:Coumarins / Q000302:isolation & purification*; D003377:Countercurrent Distribution / Q000379:methods*; D011564:Furocoumarins / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D021241:Spectrometry, Mass, Electrospray Ionization; D013056:Spectrophotometry, Ultraviolet
chemical_list: D003374:Coumarins; D011564:Furocoumarins; C021768:xanthotoxol; C046627:osthol