Catalog classification, reference sizes, lab math links, and source-backed data. Educational use only — not medical advice.
Researched for: PepTools vendor-neutral scientific reference catalog
Also known as: 17alpha-Trenbolone, 17-Epitrenbolone, Epi-Tren, alpha-Trenbolone, 17alpha-Hydroxytrenbolone, (17alpha)-17-hydroxyestra-4,9,11-trien-3-one
Epitrenbolone is a synthetic C18 steroid structurally related to trenbolone and is identified as 17alpha-trenbolone or 17alpha-hydroxyestra-4,9,11-trien-3-one. It has been characterized in analytical and anti-doping studies as a principal human urinary metabolite of trenbolone, frequently measured as the unconjugated compound or after analysis of glucuronide and other phase-II conjugates. No established therapeutic indication or validated clinical-use regimen was identified in the authoritative sources reviewed.
Source review pending. This descriptive profile is shown from the available source material as a best-effort educational reference. It has not passed the full verification bar and is not a dosing instruction, medical claim, or treatment recommendation.
A human excretion study administered a single 10 mg oral dose of five-fold deuterated trenbolone to one healthy male volunteer; epitrenbolone was detectable in urine for approximately 45 hours. This is a study-specific detection window for a metabolite following administration of the parent compound and is not a validated half-life for epitrenbolone. A separate controlled dermal-exposure study using 50 micrograms of trenbolone reported epitrenbolone as the predominant urinary metabolite, with detection up to three days post-application. These findings are analytical research observations and do not establish a therapeutic dose, route, safety profile, or clinical use for epitrenbolone.
Supplementary research context only. Not medical advice or a treatment recommendation.
PubChem CID 149836; CAS RN 80657-17-6; molecular formula C18H22O2; molecular weight 270.4 g/mol; InChIKey MEHHPFQKXOUFFV-HIEASXQVSA-N; IUPAC name (8S,13S,14S,17R)-17-hydroxy-13-methyl-2,6,7,8,14,15,16,17-octahydro-1H-cyclopenta[a]phenanthren-3-one.
Epitrenbolone is used primarily as an analytical target or biomarker in trenbolone metabolism and doping-control research. Detection commonly involves LC-MS/MS, LC-HRMS, or GC-MS-based methods. Analytical behavior can be complicated by the conjugated steroid structure and derivatization or thermal-degradation artifacts.
Reflects published research. Educational reference — not a recommendation for use.
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Published articles on this site that mention Epitrenbolone or one of its catalog aliases.
Research Use Only. All content is for educational and research reference only. Not medical advice, a treatment recommendation, or guidance on human use. Compounds are not FDA-approved drugs unless specifically noted.