title: Preparative separation and purification of bufadienolides from Chinese traditional medicine of ChanSu using high-speed counter-current chromatography.
abstract: A preparative high-speed counter-current chromatography method for isolation and purification of bufadienolides from ChanSu was developed by using a stepwise elution with two-phase solvent system composed of n-hexane/ethyl acetate/methanol/water at the ratios of 4:6:2:4 v/v, 4:6:2.5:4 v/v and 4:6:3.2:4 v/v. A total of 3.8 mg of gamabufotalin (1), 7.2 mg of arenobufagin (2), 3.4 mg of telocinobufagin (3), 5.3 mg of bufotalin (4), 8.5 mg of cinobufotalin (5) and 8 mg of bufalin (6) were obtained in one-step separation from 80 mg of the crude extract with purity of 92.7, 96.7, 87.2, 97.3, 94.9 and 99.4%, respectively. Their chemical structures were identified on the basis of (1)H-NMR and (13)C-NMR technology.
authors.affiliation: School of Pharmacy, Dalian Medical University, Dalian, P. R. China.
authors.forename: Jingkui
authors.initials: J
authors.lastname: Li
authors.forename: Xiaochi
authors.initials: X
authors.lastname: Ma
authors.forename: Fengyun
authors.initials: F
authors.lastname: Li
authors.forename: Jingkui
authors.initials: J
authors.lastname: Wang
authors.forename: Huirong
authors.initials: H
authors.lastname: Chen
authors.forename: Gang
authors.initials: G
authors.lastname: Wang
authors.forename: Xia
authors.initials: X
authors.lastname: Lv
authors.forename: Changkai
authors.initials: C
authors.lastname: Sun
authors.forename: Jingming
authors.initials: J
authors.lastname: Jia
mesh_terms: D000664:Amphibian Venoms / Q000737:chemistry*; D002018:Bufanolides / Q000032:analysis* / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid; D003377:Countercurrent Distribution / Q000379:methods*; D009682:Magnetic Resonance Spectroscopy; D008516:Medicine, Chinese Traditional
chemical_list: D000664:Amphibian Venoms; D002018:Bufanolides; C095591:chan su