title: Determination of the new morpholino anthracycline MX2.HCl and its metabolites in biological samples by high-performance liquid chromatography.
abstract: Methods for determining concentrations of a new morpholino anthracycline MX2.HCl and its metabolites in biological samples using reversed-phase high-performance liquid chromatography and fluorescence detection are described. The limits of detection were less than 1 ng/ml for all compounds after extraction from 0.5 ml of plasma using C18 Sep-Pak cartridges and consecutive solvent extraction. The recoveries from rat plasma ranged from 72.0 to 89.3%. The peak-height ratio of the fluorescence intensities of these compounds versus internal standard showed a linear correlation for concentrations up to at least 500 ng/ml in the plasma (correlation coefficient r greater than 0.999). The within-day and between-day precisions of this assay were in the range 0.8-8.7% (n = 5) and 2.0-3.5% (n = 5), respectively. The concentrations of these compounds in the blood and urine can be also determined by a slight modification of the extraction procedure.
authors.affiliation: Pharmaceutical Development Laboratory, Kirin Brewery Co., Ltd., Gunma, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Shinkai
authors.forename: H
authors.initials: H
authors.lastname: Takahashi
authors.forename: K
authors.initials: K
authors.lastname: Kikuchi
authors.forename: H
authors.initials: H
authors.lastname: Kawai
authors.forename: N
authors.initials: N
authors.lastname: Otake
mesh_terms: D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000378:metabolism*; D002360:Carubicin / Q000031:analogs & derivatives* / Q000378:metabolism; D002851:Chromatography, High Pressure Liquid; D051381:Rats; D013050:Spectrometry, Fluorescence
chemical_list: D000903:Antibiotics, Antineoplastic; C053537:morpholinoanthracycline MX2; D002360:Carubicin