title: High-performance liquid chromatographic analysis of DA-7867, a new oxazolidinone, in human plasma and urine and in rat tissue homogenates.
abstract: An HPLC method was developed for the determination of a new oxazolidinone, DA-7867 (I), in human plasma and urine and in rat tissue homogenates. To 100 microl of biological sample, 300 microl acetonitrile and 50 microl methanol containing 10 microg/ml DA-7858 (the internal standard) were added. After vortex-mixing and centrifugation, the supernatant was evaporated under a gentle stream of nitrogen. The residue was reconstituted in 100 microl of the mobile phase and a 50-microl aliquot was injected directly onto the reversed-phase (C(18)) column. The mobile phase, 20 mM KH2PO4:acetonitrile (75:25, v/v) was run at a flow rate of 1.5 ml/min and the column effluent was monitored by a UV detector set at 300 nm. The retention times of I and DA-7858 were approximately 6.5 and 8.7 min, respectively. The detection limits of I in human plasma and urine and in rat tissue homogenates were 20, 20, and 50 ng/ml, respectively.
authors.affiliation: College of Pharmacy, Seoul National University, 151-742 Seoul, South Korea.
authors.forename: Soo Kyung
authors.initials: SK
authors.lastname: Bae
authors.forename: Eun Jung
authors.initials: EJ
authors.lastname: Kim
authors.forename: Jong Won
authors.initials: JW
authors.lastname: Kwon
authors.forename: Won Bae
authors.initials: WB
authors.lastname: Kim
authors.forename: Myung Gull
authors.initials: MG
authors.lastname: Lee
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000032:analysis* / Q000097:blood / Q000652:urine; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006801:Humans; D008297:Male; D023303:Oxazolidinones / Q000032:analysis* / Q000097:blood / Q000652:urine; D051381:Rats; D017207:Rats, Sprague-Dawley; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000900:Anti-Bacterial Agents; C480487:DA-7867; D023303:Oxazolidinones