title: Preparative isolation of neomangiferin and mangiferin from Rhizoma anemarrhenae by high-speed countercurrent chromatography using ionic liquids as a two-phase solvent system modifier.
abstract: A preparative high-speed countercurrent chromatography method for isolation and purification of neomangiferin and mangiferin from Rhizoma anemarrhenae was successfully established by using ionic liquids as the modifier of the two-phase solvent system. Neomangiferin and mangiferin were purified from the crude extract of R. anemarrhenae by using ethyl acetate-water-[C(4)mim][PF(6)] (5:5:0.2 v/v) as two-phase solvent system. In total, 22.5 mg of neomangiferin and 70.6 mg of mangiferin were obtained from 150 mg of the crude extract. The purities of neomangiferin and mangiferin were 97.2 and 98.1%, respectively, as determined by HPLC. The chemical structures of the isolated compounds were identified by (1)H-NMR and (13)C-NMR.
authors: College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong, PR China.
authors: Lili
authors: L
authors: Xu
authors: Aifeng
authors: A
authors: Li
authors: Ailing
authors: A
authors: Sun
authors: Renmin
authors: R
authors: Liu
mesh_terms: D003377:Countercurrent Distribution / Q000295:instrumentation / Q000379:methods*; D004365:Drugs, Chinese Herbal / Q000737:chemistry; D005960:Glucosides / Q000302:isolation & purification*; D052578:Ionic Liquids / Q000737:chemistry*; D015394:Molecular Structure; D012997:Solvents / Q000737:chemistry*; D044004:Xanthones / Q000302:isolation & purification*
chemical_list: D004365:Drugs, Chinese Herbal; D005960:Glucosides; D052578:Ionic Liquids; D012997:Solvents; D044004:Xanthones; C442164:neomangiferin; C013592:mangiferin