title: High-performance liquid chromatographic determination of acetyl-11-keto-alpha-boswellic acid, a novel pentacyclic triterpenoid, in plasma using a fluorinated stationary phase and photodiode array detection: application in pharmacokinetic studies.
abstract: A rapid, sensitive and selective HPLC separation with photodiode array detection was developed for the analysis of the novel pentacyclic triterpenoid acetyl-11-keto-alpha-boswellic acid. Complete baseline separation of acetyl-11-keto-alpha-boswellic acid from the corresponding isomer acetyl-11-keto-beta-boswellic acid was achieved on a fluorinated stationary phase. The standard curve was linear from 0.98 nmol/l to 196 nmol/l acetyl-11-keto-alpha-boswellic acid. The compound was isolated from chick embryonic plasma using extraction on diatomaceous earth with an overall average extraction yield of 82%. This method was applied in a kinetic study on the chick chorioallantoic membrane model (CAM) and showed unequivocal separation between acetyl-11-keto-alpha-boswellic acid and acetyl-11-keto-beta-boswellic acid unachievable so far.
authors.affiliation: Department of Pharmacology of Natural Products and Clinical Pharmacology, University of Ulm, Helmholtzstrasse 20, D-89081 Ulm, Germany.
authors.forename: Berthold
authors.initials: B
authors.lastname: Büchele
authors.forename: Waltraud
authors.initials: W
authors.lastname: Zugmaier
authors.forename: Felicitas
authors.initials: F
authors.lastname: Genze
authors.forename: Thomas
authors.initials: T
authors.lastname: Simmet
mesh_terms: D000818:Animals; D002642:Chick Embryo; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005461:Fluorine / Q000737:chemistry*; D012680:Sensitivity and Specificity; D014315:Triterpenes / Q000097:blood* / Q000493:pharmacokinetics
chemical_list: D014315:Triterpenes; C094432:acetyl-11-ketoboswellic acid; D005461:Fluorine