Epitestosterone
As a result, tests to determine the ratio of testosterone to epitestosterone in urine are used to find athletes who are doping.Epitestosterone has not been shown to enhance athletic performance, although administration of epistestosterone can be used to mask a high level of testosterone if the standard T/E ratio test is used.[8] A member of the IOC Medical Commission, Manfred Donike, privately ran additional tests with a new technique for identifying abnormal levels of testosterone by measuring its ratio to epitestosterone in urine.On September 20, 2007 Floyd Landis was stripped of his title as winner of the Tour de France, and was subjected to a two-year ban from professional racing after a second test showing an elevated T/E ratio.On August 1, 2006, media reports said that synthetic testosterone had been detected in the A sample, using the carbon isotope ratio test CIR.
IUPAC nameCAS NumberChEMBLChemSpiderDrugBankECHA InfoCardPubChemCompTox DashboardSMILESChemical formulaMolar massstandard stateendogenoussteroidepimerandrogensex hormonetestosteronecompetitiveantagonistandrogen receptor5α-reductase inhibitorprostateexogenousdopingAustralian Senate1980 Moscow OlympicsMary Deckerfalse positivesFloyd LandisTour de Francesyntheticisotope17α-EstradiolsteroidsPrecursorsCholesterol22R-Hydroxycholesterol20α,22R-DihydroxycholesterolPregnenolone17α-Hydroxypregnenolone21-HydroxypregnenoloneCorticosteroidsGlucocorticoids3α,5α-Tetrahydrocorticosterone5α-Dihydrocorticosterone11-Deoxycorticosterone11-Deoxycortisol11-Ketoprogesterone21-Deoxycortisol21-DeoxycortisoneCorticosteroneCortisolCortisone17α-HydroxyprogesteroneProgesterone5α-DihydrocortisolMineralocorticoids5α-Dihydroaldosterone11-Dehydrocorticosterone (11-oxocorticosterone, 17-deoxycortisone)11β-Hydroxyprogesterone (21-deoxycorticosterone)18-Hydroxy-11-deoxycorticosterone18-HydroxycorticosteroneAldosteroneSex steroidsAndrogens11-Ketodihydrotestosterone11-Ketotestosterone7β-Hydroxyepiandrosterone11β-HydroxyandrostenedioneAdrenosterone (11-ketoandrostenedione)AndrostenediolAndrostenedioneAndrosteroneDehydroandrosteroneDHEA sulfateDihydrotestosteroneEpiandrosterone16α-Hydroxyandrostenedione16α-Hydroxy-DHEA16α-Hydroxy-DHEA sulfate3α-Androstanediol3α-Androstanediol glucuronide3β-Androstanediol5β-Dihydrotestosterone3α-Etiocholanediol3β-EtiocholanediolAndrostenediol sulfateAndrostenetriolAndrosterone glucuronideAndrosterone sulfateEtiocholanedioneEtiocholanoloneEtiocholanolone glucuronideEpietiocholanoloneTestosterone glucuronideTestosterone sulfateEstrogensEstetrolEstradiolEstroneEstriol16β-Epiestriol (16β-hydroxyestradiol)17α-Epiestriol (16α-hydroxy-17α-estradiol)16β,17α-Epiestriol (16β-hydroxy-17α-estradiol)2-Hydroxyestradiol2-Hydroxyestriol2-Hydroxyestrone4-Hydroxyestradiol4-Hydroxyestriol4-Hydroxyestrone4-Methoxyestradiol4-Methoxyestrone16α-Hydroxyestrone16β-Hydroxyestrone16-Ketoestradiol16-Ketoestrone27-Hydroxycholesterol4-Androstenedione5-Androstenediol7-Keto-DHEA7α-Hydroxy-DHEA2-Methoxyestradiol2-Methoxyestrone2-Methoxyestriol4-Methoxyestriol