Gas chromatography/mass spectrometry characterization of urinary metabolites of danazol after oral administration in human

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Gas chromatography/mass spectrometry identified four new urinary metabolites of danazol in healthy volunteers, proposing specific biomarkers for detecting the drug's abuse.

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Abstract

Danazol (17alpha-pregna-2,4-dien-20-yno [2,3-d]-isoxazol-17beta-ol), is a synthetic derivative of ethisterone, structurally related to stanozolol. For this reason its use as doping agent has been investigated. Danazol (Runch) (200 mg) were orally administered to two healthy male volunteers. Urine samples were collected up to 1-week post-dose. Four new metabolites have been identified in addition to the five previously reported. We propose the monitorization of 6beta-hydroxy-2-hydroxymethyl-1,2-dehydroethisterone and 6beta,16epsilon-dihydroxy-2epsilon-hydroxymethyl-ethisterone by free fraction analysis. In a same way, we proposed to detect the principal isomer of a mono-hydroxylated metabolite of 6beta-hydroxy-2epsilon-hydroxymethylethisterone in the conjugated fraction. We conclude that new metabolites can be included for the detection of danazol abuse since the main metabolite ethisterone is excreted relatively fast in urine.

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MeSH descriptors

Anabolic Agents Danazol Gas Chromatography-Mass Spectrometry Administration, Oral Adult Anabolic Agents Anabolic Agents Danazol Danazol Doping in Sports Gas Chromatography-Mass Spectrometry Humans Male Reference Standards

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