Abstract
The identity of the human metabolites of ketoprofen (2-(3-benzoylphenyl)-propanoic acid) excreted via urine was investigated after a single oral dose of the racemic drug.Drug metabolites were concentrated and partially purified from urine using solid-phase extraction chromatography before separation and identification by directly coupled HPLC-MS and HPLC-NMR.The metabolites identified were the ester glucuronides of the parent drug and its phase I metabolites, 2-[3-(3-hydroxybenzoyl)phenyl]-propanoic acid, 2-[3-(4-hydroxybenzoyl)phenyl]-propanoic acid and 2-[3-(hydroxy(phenyl)methyl)phenyl]-propanoic acid, the latter formed by reduction of the ketone group of ketoprofen. In addition, two novel minor metabolites were identified as the ether glucuronides of 2-[3-(3-hydroxybenzoyl)phenyl]-propanoic acid and 2-[3-(4-hydroxybenzoyl)phenyl]-propanoic acid. These conjugates were all observed as diastereoisomeric pairs of unequal proportions.Purification of these metabolites by preparative chromatography allowed stereochemistry assignments.Metabolites were quantified by 1H-NMR spectroscopy after spectral simplification achieved by hydrolysis of the conjugates.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
