Epostane

Epostane (INN, USAN, BAN) (developmental code name WIN-32729) is an inhibitor of 3β-hydroxysteroid dehydrogenase (3β-HSD) that was developed as a contraceptive, abortifacient, and oxytocic drug but was never marketed.[1][2][3] By inhibiting 3β-HSD, epostane blocks the biosynthesis of progesterone from pregnenolone (and also the conversion of dehydroepiandrosterone to androstenedione), thereby functioning as an antiprogestogen and terminating pregnancy.[1] The drug was trialed and in a study was found to be slightly more effective at inducing abortion relative to mifepristone.[4]

Epostane
Clinical data
Other namesWIN-32729
Identifiers
  • 4α,5α-Epoxy-3,17β-dihydroxy-4β,17α-dimethylandrost-2-ene-2-carbonitrile
CAS Number
PubChem CID
ChemSpider
UNII
ChEMBL
CompTox Dashboard (EPA)
Chemical and physical data
FormulaC22H31NO3
Molar mass357.494 g·mol−1
3D model (JSmol)
  • C[C@]12CC[C@H]3[C@H]([C@@H]1CC[C@]2(C)O)CC[C@]45[C@@]3(CC(=C([C@]4(O5)C)O)C#N)C
  • InChI=1S/C22H31NO3/c1-18-8-6-16-14(15(18)7-9-20(18,3)25)5-10-22-19(16,2)11-13(12-23)17(24)21(22,4)26-22/h14-16,24-25H,5-11H2,1-4H3/t14-,15-,16-,18-,19+,20-,21+,22-/m0/s1
  • Key:CETKWEWBSMKADK-GSXVSZIWSA-N

See also

References
  1. Elks J (14 November 2014). The Dictionary of Drugs: Chemical Data: Chemical Data, Structures and Bibliographies. Springer. pp. 492–. ISBN 978-1-4757-2085-3.
  2. Morton IK, Hall JM (6 December 2012). Concise Dictionary of Pharmacological Agents: Properties and Synonyms. Springer Science & Business Media. pp. 113–. ISBN 978-94-011-4439-1.
  3. Milne GW (8 May 2018). Drugs: Synonyms and Properties: Synonyms and Properties. Taylor & Francis. pp. 23–. ISBN 978-1-351-78989-9.
  4. Lachelin GC (11 September 2013). Introduction to Clinical Reproductive Endocrinology. Elsevier Science. pp. 198–. ISBN 978-1-4831-9380-9.
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