title: Preparative isolation and purification of four compounds from the Chinese medicinal herb rhizoma Anemarrhenae by high-speed counter-current chromatography.
abstract: High-speed counter-current chromatography (HSCCC) was applied to the separation and purification of mangiferin, neomangiferin, cis-hinkiresinol and (-)-4'-O-methylnyasol from the Chinese medicinal herb rhizoma Anemarrhenae. Five hundred milligrams of crude extracts were separated by using n-butanol-acetic acid (1%) (1:1, v/v) as the two-phase solvent system and yielded 35.3 mg of neomangiferin and 245.4 mg of mangiferin. During this separation, cis-hinkiresinol and (-)-4'-O-methylnyasol were still maintained in the stationary phase. The stationary phase was collected, evaporated to dryness and separated with light petroleum-ethyl acetate-methanol-water (1:1:1.2:0.8, v/v) and 1:1:1.4:0.6 (v/v) in gradient elution, which yielded 17.2 mg of cis-hinkiresinol and 12.4 mg of (-)-4'-O-methylnyasol. The purities of mangiferin, neomangiferin, cis-hinkiresinol and (-)-4'-O-methylnyasol were 96.3, 98.0, 97.3 and 98.2%, respectively, as determined by HPLC. The chemical structures of these components were identified by 1H NMR and 13C NMR.
authors.affiliation: College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China.
authors.forename: Qinghua
authors.initials: Q
authors.lastname: Sun
authors.forename: Ailing
authors.initials: A
authors.lastname: Sun
authors.forename: Renmin
authors.initials: R
authors.lastname: Liu
mesh_terms: D031403:Anemarrhena / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D003377:Countercurrent Distribution / Q000379:methods*; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure
chemical_list: D004365:Drugs, Chinese Herbal