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  • Title: Isolation of an unknown metabolite of the non-steroidal anti-inflammatory drug etodolac and its identification as 5-hydroxy etodolac.
    Author: Strickmann DB, Blaschke G.
    Journal: J Pharm Biomed Anal; 2001 Jul; 25(5-6):977-84. PubMed ID: 11377082.
    Abstract:
    The non-steroidal anti-inflammatory drug etodolac is extensively metabolized in the liver. Renal elimination of etodolac mainly as glucuronide and its other phase I and phase II metabolites is the primary route of excretion. High-performance liquid chromatography assays of human urine after application of etodolac indicated the existence of a further monohydroxylated metabolite (metabolite X) that was identified as 5-hydroxy etodolac. For the identification, electrospray ionization mass spectrometry (ESI-MS) as well as 1H-nuclear magnetic resonance (1H-NMR) and 13C-NMR spectroscopy have been used.
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