title: Determination of piribedil and its basic metabolites in plasma by high-performance liquid chromatography.
abstract: A high-performance liquid chromatographic method for the determination of piribedil and its p-hydroxylated, catechol and N-oxide metabolites in plasma is described. After addition of an internal standard (buspirone), the plasma samples were subjected to a three-step extraction procedure. The final extracts were evaporated to dryness under nitrogen, and the residues were reconstituted in 100 microliters of mobile phase (0.01 M phosphate buffer-acetonitrile, 50:50, v/v) and chromatographed by acetonitrile gradient elution on a C18 reversed-phase column coupled to an ultraviolet detector set at 240 nm. The method was selective for piribedil and its metabolites, and sufficiently sensitive and precise for studies aimed at elucidating the role of the metabolites in the parent drug's pharmacological effects.
authors.affiliation: Istituto di Ricerche Farmacologiche Mario Negri, Milan, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Sarati
authors.forename: G
authors.initials: G
authors.lastname: Guiso
authors.forename: R
authors.initials: R
authors.lastname: Spinelli
authors.forename: S
authors.initials: S
authors.lastname: Caccia
mesh_terms: D000097:Acetonitriles; D000818:Animals; D002065:Buspirone; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D008297:Male; D010891:Piribedil / Q000097:blood* / Q000378:metabolism; D051381:Rats; D014466:Ultraviolet Rays
chemical_list: D000097:Acetonitriles; D010891:Piribedil; D002065:Buspirone; C032159:acetonitrile