title: Isolation and purification of Pseudostellarin B (cyclic peptide) from Pseudostellaria heterophylla (Miq.) Pax by high-speed counter-current chromatography.
abstract: Pseudostellarin B (cyclic peptide) was isolated and purified from the herbs of Pseudostellaria heterophylla (Miq.) Pax for the first time by high-speed counter-current chromatography (HSCCC) using a two-phase solvent system consisting of n-butanol-ethyl acetate-water (0.6:4.4:5, v/v). The technique can isolate mg levels of the target compound per run with purity better than 96%. The chemical structure of the compound has been positively confirmed by electrospray ionization time of flight (TOF) MS, (1)H-NMR, (13)C-NMR and (1)H-(13)C-COSY analyses.
authors.affiliation: Department of Chemistry and the Key Laboratory of Analytical Science of the MOE, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Han
authors.forename: Junhui
authors.initials: J
authors.lastname: Chen
authors.forename: Jie
authors.initials: J
authors.lastname: Liu
authors.forename: Frank Sen-Chun
authors.initials: FS
authors.lastname: Lee
authors.forename: Xiaoru
authors.initials: X
authors.lastname: Wang