Melengestrol acetate

Melengestrol acetate
Systematic (IUPAC) name

17-hydroxy-6-methyl-16-methylenepregna-4,6-diene-3,20-dione acetate
Identifiers
CAS Number	2919-66-6
ATC code	None
PubChem	CID 250948
ChemSpider	219803
Chemical data
Formula	C₂₅H₃₂O₄
Molar mass	396.519 g/mol
SMILES O=C4\C=C3\C(=C/[C@@H]1[C@H](CC[C@@]2([C@](OC(=O)C)(C(=C)\C[C@@H]12)C(=O)C)C)[C@@]3(C)CC4)C
InChI InChI=1S/C25H32O4/c1-14-11-19-20(23(5)9-7-18(28)13-21(14)23)8-10-24(6)22(19)12-15(2)25(24,16(3)26)29-17(4)27/h11,13,19-20,22H,2,7-10,12H2,1,3-6H3/t19-,20+,22+,23-,24+,25+/m1/s1 Key:UDKABVSQKJNZBH-DWNQPYOZSA-N

Melengestrol acetate (INN, USAN), sometimes abbreviated as MGA, is a steroidal progestin and antineoplastic agent.^[1] It is not approved for use in humans. Instead it's used as an implantable contraceptive for captive animals in zoos and other refuges,^[2] and it's also used as a feed additive to promote growth in cattle, a purpose it is licensed for in the United States and Canada.^[3] It is an acetate ester of melengestrol, which in contrast, is not used in either animals or humans.^[1]

References

1 2 David J. Triggle (1997). Dictionary of pharmacological agents. London: Chapman & Hall. p. 1269. ISBN 0-412-46630-9.
↑ Asa, C.S.; Porton, I.J. (2010). "Chapter 34: Contraception as a Management Tool for Controlling Surplus Animals". In Kleiman, D.G.; Thompson, K.V.; Baer, C.K. Wild Mammals in Captivity: Principles and Techniques for Zoo Management (2nd ed.). Chicago, IL: University of Chicago Press. pp. 469–482. ISBN 9780226440118. Retrieved 17 March 2016.
↑ Jack F. Kay (26 November 2009). Analyses for Hormonal Substances in Food-Producing Animals. Royal Society of Chemistry. p. 139. ISBN 978-0-85404-198-5. Retrieved 27 May 2012.

Progestogenics

Receptor
(ligands)

Agonists	3,8-Dihydrodiligustilide 5α-Dihydroprogesterone 20α-Dihydroprogesterone 11-Dehydroprogesterone 11-Deoxycorticosterone 17α-Hydroxyprogesterone 19-Norprogesterone Δ^4-Tibolone Algestone Algestone acetonide Algestone acetophenide Allylestrenol Altrenogest Amadinone Amadinone acetate Anagestone Anagestone acetate Canrenoic acid Canrenone Chlormadinone Chlormadinone acetate Cingestol Cismadinone Cismadinone acetate Clogestone Clogestone acetate Clomegestone Clometerone Cyproterone acetate Danazol Delmadinone Delmadinone acetate Demegestone Desogestrel Dienogest Dimethisterone Diosgenin Drospirenone Dydrogesterone Edogesterone Ethisterone Ethynerone Etonogestrel Etynodiol Etynodiol diacetate Flugestone Flugestone acetate Gestaclone Gestadienol Gestodene Gestonorone Gestonorone caproate Gestovister Gestrinone Gestronol Guggulsterone Haloprogesterone Hydromadinone Hydroxyprogesterone acetate Hydroxyprogesterone caproate Hydroxyprogesterone heptanoate Hydroxyprogesterone hexanoate Levonorgestrel Lutenyl Lynestrenol Medrogestone Medroxyprogesterone Medroxyprogesterone acetate Megestrol Megestrol acetate Melengestrol Melengestrol acetate Mespirenone Methylestrenolone Methynodiol Methynodiol diacetate Mometasone furoate Nandrolone Nestorone Nomegestrol Nomegestrol acetate Norelgestromin Norethisterone (norethindrone) Norethisterone acetate Norethisterone acetate oxime Norethisterone enanthate Noretynodrel Norgesterone Norgestimate Norgestomet Norgestrel Norgestrienone Norvinisterone Org-2058 Oxogestone Oxogestone phenpropionate Pentagestrone Potassium canrenoate Progesterone Proligestone Promegestone Retroprogesterone Riligustilide Quingestanol Quingestanol acetate Quingestrone Segesterone Spironenone Spironolactone Tanaproget Tetrahydrogestrinone Tibolone Tigestol Tosagestin Trengestone Trimegestone ZM-182,345

Mixed (SPRMs)	Apigenin Asoprisnil Asoprisnil ecamate Kaempferol J1042 LG-120,838 Naringenin Syringic acid Telapristone Antagonistic: Mifepristone Org-31710 Org-33628 Ulipristal acetate ZK-137,316

Antagonists	3α-Hydroxytibolone 3β-Hydroxytibolone Aglepristone Lilopristone Lonaprisan Onapristone Toripristone Valproic acid Vilaprisan ZM-150,271 ZM-172,406

Enzyme

Modulators	See here instead (modulators of 20,22-desmolase, 17α-hydroxylase/17,20-lyase, 3β-HSD, and 21-hydroxylase).

Others

Precursors/prohormones	Cholesterol 22R-Hydroxycholesterol 20α,22R-Dihydroxycholesterol Pregnenolone Pregnenolone sulfate 17-Hydroxypregnenolone

Indirect	Antigonadotropins (e.g., estrogens, progestogens, prolactin) GnRH agonists (e,g, GnRH, leuprorelin) GnRH antagonists (e.g., cetrorelix) Gonadotropins (e.g., FSH, hCG, LH) Kisspeptin Plasma proteins (ABP, albumin, SHBG)

See also: Androgenics • Estrogenics • Glucocorticoids • Mineralocorticoids

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