From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Clinical data
Other names6,6-Difluoro-17α-ethynyl-19-nortestosterone; 6,6-Difluoro-17α-ethynylestr-4-en-17β-ol-3-one
CAS Number
Chemical and physical data
Molar mass334.405 g/mol g·mol−1
3D model (JSmol)

6,6-Difluoronorethisterone, also known as 6,6-difluoro-17α-ethynyl-19-nortestosterone or as 6,6-difluoro-17α-ethynylestr-4-en-17β-ol-3-one, is a steroidal progestin of the 19-nortestosterone group that was described in 1971 but was never marketed.[1][2][3] It is a fluorinated derivative of norethisterone. The C17β acetate ester, 6,6-difluoronorethisterone acetate, has also been synthesized and described.[1]


  1. ^ a b J. Elks (14 November 2014). The Dictionary of Drugs: Chemical Data: Chemical Data, Structures and Bibliographies. Springer. pp. 522–. ISBN 978-1-4757-2085-3.
  2. ^ K. H. Overton (January 1973). Terpenoids and Steroids. Royal Society of Chemistry. pp. 432–. ISBN 978-0-85186-276-7.
  3. ^ Annual Reports in Medicinal Chemistry. Academic Press. 27 October 1972. pp. 187–. ISBN 978-0-08-058351-8.