title: Simultaneous determination of the stereoisomers of guggulsterone in serum by high-performance liquid chromatography.
abstract: Simultaneous separation of E- and Z-guggulsterone, which is the main ingredient of 'Guggulip', an ayurvedic drug, was accomplished by HPLC on a C18 column using methanol, acetonitrile, buffer and tetrahydrofuran as a mobile phase. The compounds were monitored at 248 nm on a photodiode array detector. The assay method was used for the simultaneous determination of stereoisomers (E and Z) of guggulsterone in spiked serum and dosed (50 mg/kg, p.o.) rats. The recoveries of E- and Z-isomers from serum samples were always greater than 90%. The calibration graph was linear over the range of 25-2500 ng/ml for Z- and E-isomers. Lowest quantitation limit of Z- and E-guggulsterones was 25 ng/ml.
authors.affiliation: Pharmacokinetics and Metabolism Division, Central Drug Research Institute, Lucknow, India.
authors.forename: N
authors.initials: N
authors.lastname: Verma
authors.forename: S K
authors.initials: SK
authors.lastname: Singh
authors.forename: R C
authors.initials: RC
authors.lastname: Gupta
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004355:Drug Stability; D000960:Hypolipidemic Agents / Q000097:blood*; D011282:Pregnenediones / Q000097:blood* / Q000493:pharmacokinetics; D051381:Rats; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013237:Stereoisomerism
chemical_list: D000960:Hypolipidemic Agents; D011282:Pregnenediones; C023617:pregna-4,17-diene-3,16-dione