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  • Title: Easy stereoselective synthesis of 5α-estrane-3β,17α-diol, the major metabolite of nandrolone in the horse.
    Author: Balssa F, Fischer M, Bonnaire Y.
    Journal: Steroids; 2011 Jun; 76(7):667-8. PubMed ID: 21419146.
    Abstract:
    5α-Estrane-3β,17α-diol is the major metabolite of nandrolone in horse urine. The presence of 5α-estrane-3β,17α-diol in female and gelding urines is prohibited by Racing Rules and its natural presence in male urine led regulation authorities to establish a concentration threshold of 45 ng/mL. This paper describes a rapid, simple and stereoselective synthesis of 5α-estrane-3β,17α-diol, providing horseracing laboratories with an essential reference material for their antidoping performance.
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