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pubmed-article:9667023pubmed:abstractTextDirect chiral resolution of four major flavanones recovered from post-administrative urine of the traditional Chinese medicines Daisaiko-to and Shosaiko-to was achieved by high-performance liquid chromatography (HPLC) on macroporous silica gel coated with cellulose tris(3,5-dimethylphenylcarbamate), Chiralcel OD. Chromatographic conditions were optimized so as to attain satisfactory enantiomeric resolution of the polysubstituted flavanones. Urinary liquiritigenin and naringenin were considerable mixtures of R and S-enantiomers, while S-enantiomers of dihydrowogonin and dihydrooroxylin A were predominantly excreted. Our chiral HPLC techniques can be applied to pharmacokinetical evaluation of the chiral flavanone enantiomers following oral administration of the herbal medicines.lld:pubmed
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pubmed-article:9667023pubmed:dateRevised2010-11-18lld:pubmed
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pubmed-article:9667023pubmed:articleTitleChiral resolution of four major flavanones in post-administrative urine of Chinese herbal medicines by HPLC on macroporous silica gel coated with cellulose tris(3,5-dimethylphenylcarbamate).lld:pubmed
pubmed-article:9667023pubmed:affiliationDepartment of Clinical Pharmacology, School of Pharmacy, Tokyo University of Pharmacy and Life Science, Japan.lld:pubmed
pubmed-article:9667023pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:9667023pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed