title: [Isolation, purification and identification of geniposidic acid in Eucommia ulmoides oliv. by silica column chromatography, reversed-phase high performance liquid chromatography, liquid chromatography-electrospray ionization mass spectrometry and nuclear magnetic resonance].
abstract: The methods using silica column chromatography, reversed-phase high performance liquid chromatography, liquid chromatography-electrospray ionization mass spectrometry and nuclear magnetic resonance (RP-HPLC/LC-ESI-MS/NMR) for the isolation, purification and identification of geniposidic acid (GPA) in Eucommia ulmoides Oliv. were established. The crude extract of E. ulmoides was obtained after E. ulmoides was extracted with 70% ethanol and the extract was concentrated under reduced pressures. The obtained crude extract dissolved in methanol was injected to a silica gel column and eluted with chloroform-methanol. The eluted fractions were analyzed by RP-HPLC. The eluant from chloroform-methanol (8:1, v/v) was indicated to be a single component by HPLC with a retention time of 5.142 min. The HPLC analysis of the mixture of this fraction with a GPA standard resulted in a single peak. The ultraviolet and infrared spectra of the eluted solution were essentially the same to those of GPA. On the other hand, LC-ESI-MS, 1H- and 13C-NMR experiments also indicated that the fraction was identical to GPA.
authors.affiliation: Department of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China. newfourtharmy@163.com
authors.forename: Hui
authors.initials: H
authors.lastname: Cao
authors.forename: Xiaoqing
authors.initials: X
authors.lastname: Chen
authors.forename: Jianbo
authors.initials: J
authors.lastname: Xlao
authors.forename: Zhaoqi
authors.initials: Z
authors.lastname: Tang
authors.forename: Dongsheng
authors.initials: D
authors.lastname: Ouyang
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D002853:Chromatography, Liquid / Q000379:methods*; D031283:Eucommiaceae / Q000737:chemistry*; D005960:Glucosides / Q000032:analysis / Q000737:chemistry* / Q000302:isolation & purification*; D057888:Iridoid Glucosides; D039823:Iridoids / Q000032:analysis / Q000737:chemistry* / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
chemical_list: D005960:Glucosides; D057888:Iridoid Glucosides; D039823:Iridoids; C058966:geniposidic acid