title: Preparative isolation and purification of two amides from Mallotus lianus Croiz by high-speed counter-current chromatography.
abstract: High-speed counter-current chromatography (HSCCC) was applied to the preparative isolation and purification of two amides from Mallotus lianus Croiz. In a single HSCCC separation, using the two-phase solvent system composed of n-hexane/ethyl acetate/methanol/water (5:1:5:1 v/v), 247.5 mg of the enriched crude sample was separated to afford 10.3 mg of N-isobutyl-2E,4E,12Z-octadecatrienamide and 15.7 mg of (7Z,10Z,18Z)tricosa-7,10,18-trienamide, a novel compound, with the purities of 98.0 and 94.6%, respectively. The HSCCC fractions were analyzed by HPLC and chemical structures of the compounds were identified by 1D- and 2D-NMR, ESI-, and GC-MS.
authors.affiliation: Department of Chemistry, Zhejiang University, Hangzhou, PR China.
authors.forename: Liyan
authors.initials: L
authors.lastname: Jiang
authors.forename: Yanbin
authors.initials: Y
authors.lastname: Lu
authors.forename: Shan
authors.initials: S
authors.lastname: He
authors.forename: Yuanjiang
authors.initials: Y
authors.lastname: Pan
authors.forename: Cuirong
authors.initials: C
authors.lastname: Sun
authors.forename: Tianxing
authors.initials: T
authors.lastname: Wu
mesh_terms: D000577:Amides / Q000302:isolation & purification*; D002851:Chromatography, High Pressure Liquid; D003377:Countercurrent Distribution / Q000379:methods*; D019665:Euphorbiaceae / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000577:Amides; D010936:Plant Extracts