Not to be confused with norgestimate.
Synonyms 17-Hydroxy-11β-methyl-19-norpregn-4-ene-3,20-dione acetate
CAS Number 25092-41-5
PubChem (CID) 9820838
ChemSpider 7996587
Chemical and physical data
Formula C23H32O4
Molar mass 372.49778 g/mol
3D model (Jmol) Interactive image

Norgestomet (INN, USAN, BAN) (brand name Syncro-Mate B; former developmental code name SC-21009), or norgestamet, also known as 11β-methyl-17α-acetoxy-19-norprogesterone, is a steroidal progestin of the 19-norprogesterone group used in veterinary medicine to control estrus and ovulation in cattle.[1][2] It was developed and introduced in the mid-1970s.[3]


  1. J. Elks (14 November 2014). The Dictionary of Drugs: Chemical Data: Chemical Data, Structures and Bibliographies. Springer. pp. 887–. ISBN 978-1-4757-2085-3.
  2. Charles G. Gebelein; Richard L. Dunn (1 July 1990). Progress in Biomedical Polymers. Springer Science & Business Media. pp. 356–. ISBN 978-0-306-43523-2.
  3. I. Gordon (22 October 2013). Controlled Breeding in Farm Animals. Elsevier. pp. 40–. ISBN 978-1-4832-8569-6.

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