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Vinyltestosterone
Clinical data
Other names	17α-Vinyltestosterone; Ethenyltestosterone; 17α-Ethenyltestosterone; 17α-Vinylandrost-4-en-17β-ol-3-one; 17α-Hydroxypregna-4,20-dien-3-one
Identifiers
	IUPAC name (8R,9S,10R,13S,14S,17S)-17-Ethenyl-17-hydroxy-10,13-dimethyl-2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthren-3-one;
CAS Number	1235-98-9 ;
PubChem CID	222286;
ChemSpider	192964;
UNII	SGZ6EUF8MU;
Chemical and physical data
Formula	C21H30O2
Molar mass	314.469 g·mol−1
3D model (JSmol)	Interactive image;
	SMILES C[C@]12CCC(=O)C=C1CC[C@@H]3[C@@H]2CC[C@]4([C@H]3CC[C@@]4(C=C)O)C;
	InChI InChI=1S/C21H30O2/c1-4-21(23)12-9-18-16-6-5-14-13-15(22)7-10-19(14,2)17(16)8-11-20(18,21)3/h4,13,16-18,23H,1,5-12H2,2-3H3/t16-,17+,18+,19+,20+,21-/m1/s1; Key:ILGPJZIKYMIGMU-SJFWLOONSA-N;

Vinyltestosterone (also known as 17α-vinyltestosterone, 17α-vinylandrost-4-en-17β-ol-3-one, and 17α-hydroxypregna-4,20-dien-3-one) is a synthetic anabolic–androgenic steroid (AAS) that was never marketed.^[1]^[2] However, two 19-nortestosterone derivatives of vinyltestosterone, norvinisterone (17α-vinyl-19-nortestosterone) and norgesterone (17α-vinyl-δ⁵⁽¹⁰⁾-19-nortestosterone), have been marketed.^[3] They are used as progestins for female hormonal contraception, rather than as AAS.^[3]

Vinyltestosterone is a relatively weak AAS.^[2]^[4]^[5] In one study, it showed approximately one-third and one-fifth of the respective androgenic and anabolic activity of other AAS such as nandrolone (19-nortestosterone), methyltestosterone (17α-methyltestosterone), and ethyltestosterone (17α-ethyltestosterone) in castrated male rats, whereas ethisterone (17α-ethynyltestosterone) showed almost no androgenic and anabolic activity (only 1/20 the anabolic potency of vinyltestosterone).^[4] Additionally, in women with metastatic breast cancer, vinyltestosterone was found to be ineffective in treating the disease (unlike other AAS such as testosterone propionate or fluoxymesterone)^[6] and produced little or no virilization in the women at a dosage of 100 mg intramuscularly three times per week.^[5]^[7]^[8]

References

^ Hill RA, Makin HLJ, Kirk DN, Murphy GM (23 May 1991). Dictionary of Steroids. CRC Press. pp. 226–. ISBN 978-0-412-27060-4.
^ ^a ^b Lewis RA, DeMAJO S, Rosemberg E (December 1949). "The effects of 17-vinyl testosterone upon the rat adrenal". Endocrinology. 45 (6): 564–570. doi:10.1210/endo-45-6-564. PMID 15402199.
^ ^a ^b Elks J (14 November 2014). The Dictionary of Drugs: Chemical Data: Chemical Data, Structures and Bibliographies. Springer. pp. 887, 889. ISBN 978-1-4757-2085-3.
^ ^a ^b Saunders FJ, Drill VA (May 1956). "The myotrophic and androgenic effects of 17-ethyl-19-nortestosterone and related compounds". Endocrinology. 58 (5): 567–572. doi:10.1210/endo-58-5-567. PMID 13317831.
^ ^a ^b Schedl HP, Delea C, Bartter FC (August 1959). "Structure-activity relationships of anabolic steroids: role of the 19-methyl group". The Journal of Clinical Endocrinology and Metabolism. 19 (8): 921–935. doi:10.1210/jcem-19-8-921. PMID 14442516. 17α-Vinyltestosterone in large doses manifested weak myotropic and androgenic activities in castrated male rats (1) and proved to be ineffective in the therapy of patients with metastatic breast cancer, in whom it had little or no virilizing effect at a dosage level of 100 mg. intramuscularly three times a week (18).
^ Drill VA (17 September 2013). "Physiology and Pharmacology of Steroids Affecting Tumor Growth". In Pincus G, Vollmer EP (eds.). Biological Activities of Steroids in Relation to Cancer: Proceedings of a Conference Sponsored by the Cancer Chemotherapy National Service Center, National Cancer Institute, National Institutes of Health, U. S. Department of Health, Education and Welfare. Elsevier Science. pp. 26–. ISBN 978-1-4832-7057-9.
^ Segaloff A, Gordon DL, Horwitt BN, Murison PJ, Schlosser JV (1955). "Hormonal therapy in cancer of the breast. X. The effect of vinyltestosterone therapy on clinical course and hormonal excretion". Cancer. 8 (5): 903–905. doi:10.1002/1097-0142(1955)8:5<903::aid-cncr2820080509>3.0.co;2-u. PMID 13261042. S2CID 45406269.
^ Schedl HP, Delea C, Bartter FC (August 1959). "Structure-activity relationships of anabolic steroids: role of the 19-methyl group". The Journal of Clinical Endocrinology and Metabolism. 19 (8): 921–935. doi:10.1210/jcem-19-8-921. PMID 14442516.