Benorterone
Systematic (IUPAC) name | |
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(3S,3aS,5aS,5bR,10aR,10bS)-3-Hydroxy-3,3a,5b-trimethyl-1,2,4,5,5a,6,7,10,10a,10b-decahydrocyclopenta[a]fluoren-8-one
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Clinical data | |
Routes of administration |
Oral |
Identifiers | |
CAS Number | 3570-10-3 |
ATC code | None |
PubChem | CID: 10039776 |
ChemSpider | 8215340 |
Chemical data | |
Formula | C19H28O2 |
Molecular mass | 288.42442 g/mol |
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Benorterone (INN, USAN) (developmental code names SKF-7690, FC-612), also known as 17α-methyl-β-nortestosterone, is a steroidal, pure antiandrogen that was never marketed.[1] Unlike other steroidal antiandrogens such as cyproterone acetate (CPA), it is not also a progestogen, instead acting as a selective androgen receptor antagonist similarly to non-steroidal antiandrogens such as bicalutamide.[2][3] However, although it is described as not being a progestogen, benorterone was found to produce "a highly variable decrease in plasma testosterone levels"; the reasons for this are unclear, as other pure antiandrogens such as cyproterone (not CPA) and bicalutamide do not do this and instead produce consistent increases in testosterone levels).[3]
Developed in the late 1950s and trialed in the 1960s,[1] benorterone was the first antiandrogen to be studied in humans.[4] The drug was found to be effective in the treatment of acne, seborrhea, and hirsutism in women,[3][5][6] and unlike progestogenic antiandrogens such as CPA, seldom produced side effects in women, nor affected menstruation.[3] However, in men, the drug produced gynecomastia, and upon the observance of this side effect, was soon withdrawn from clinical trials.[4][3] Subsequently, CPA, which has a much reduced risk of gynecomastia by virtue of its antigonadotropic actions, was developed and introduced in 1973 instead.[7]
See also
References
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