
Separation and purification of two new and two known alkaloids from leaves of Nitraria sibirica by pH-zone-refining counter-current chromatography
Keywords: pH-zone-refining CCC; pH-zone-refining counter-current chromatography; NSP; Nitraria sibirica Pall; NSPL; Nitraria sibirica Pall. leaves; HSCCC; high-speed counter-current chromatography; pH-zone-refining counter-current chromatography; Separation and pur