title: Phenprocoumon metabolites in human plasma; characterization by HPLC and GC-MS.
abstract: Pooled plasma from patients receiving phenprocoumon anticoagulant therapy was extracted and the following substances were characterized: phenprocoumon, and its 7-hydroxy,4'-hydroxy and 6-hydroxy derivatives; they were identified by HPLC and after methylation by quartz capillary GC-MS using the electron impact and selective ion monitoring modes. This is the first occasion when phenprocoumon metabolites have been identified in plasma; they were unconjugated and in much lower concentrations (43.2 and 2 ng/ml for the 7,4' and 6-hydroxy derivatives, respectively) than the original compound (2000 ng/ml).
mesh_terms: D015110:4-Hydroxycoumarins / Q000097:blood*; D001711:Biotransformation; D002851:Chromatography, High Pressure Liquid; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D007202:Indicators and Reagents; D010644:Phenprocoumon / Q000097:blood*
chemical_list: D015110:4-Hydroxycoumarins; D007202:Indicators and Reagents; D010644:Phenprocoumon