Chloroethynylnorgestrel

Short description: Chemical compound

Chloroethynylnorgestrel

Clinical data
Other names| Chloroethynyl norgestrel; WY-4355; 17α-Chloroethynyl-13β-ethylgon-4-en-17β-ol-3-one; 17α-Chloroethynyl-18-methylestr-4-en-17β-ol-3-one; 17α-Chloroethynyl-18-methyl-19-nortestosterone
Identifiers

IUPAC name

* (1S,2R,10R,11S,14S,15S)-14-(2-chloroethynyl)-15-ethyl-14-hydroxytetracyclo[8.7.0.02,7.011,15]heptadec-6-en-5-one

CAS Number|

* 2415-28-3

PubChem CID|

* 22790422

ChemSpider|

* 18503812

UNII|

* Q2YY22B0SV

Chemical and physical data
Formula| C21H27ClO2
Molar mass| 346.90 g·mol−1
3D model (JSmol)|

* Interactive image

SMILES

* CC[C@]12CC[C@H]3[C@H]([C@@H]1CC[C@]2(C#CCl)O)CCC4=CC(=O)CC[C@H]34

InChI

* InChI=1S/C21H27ClO2/c1-2-20-9-7-17-16-6-4-15(23)13-14(16)3-5-18(17)19(20)8-10-21(20,24)11-12-22/h13,16-19,24H,2-10H2,1H3/t16-,17+,18+,19-,20-,21+/m0/s1

* Key:MISOWVVRHHLGIK-ZUHHCLADSA-N

Chloroethynylnorgestrel (developmental code name WY-4355) is a steroidal progestin of the 19-nortestosterone group related to norgestrel that was investigated as an oral contraceptive in the 1970s but was never marketed.[1][2][3][4]

In combination with mestranol, similarly to ethynerone and anagestone acetate (and certain other progestogens, including progesterone and several other 17α-hydroxyprogesterone derivatives), chloroethynylnorgestrel was found to produce striking mammary tumors in beagle dogs after administration at very high dosages (10- to 25-fold human clinical dosages) for prolonged periods of time.[1][3][4] This resulted in the discontinuation of its development, along with that of ethynerone and anagestone acetate, as well as the removal of several progestins, including chlormadinone acetate, medroxyprogesterone acetate, and megestrol acetate, from various markets as contraceptives (although medroxyprogesterone acetate has since been reintroduced).[1][5] Subsequent research revealed that the risk is species-dependent and unique to canines and that there is no similar risk for humans.[6]

Mammary tumors in beagle dogs treated by (left) MK-665 (ethynerone with mestranol) and (right) chloroethynylnorgestrel with mestranol for 4 years at a dosage of 1.05 mg/kg/day cyclically.

## References

1. ↑ 1.0 1.1 1.2 Carcinogenic Hormones. Springer Science & Business Media. 6 December 2012. pp. 149–. ISBN 978-3-642-81267-5. https://books.google.com/books?id=lOLnCAAAQBAJ&pg=PA149.
2. ↑ "The morphologic effects of synthetic reproductive steroids on the mammary gland of rhesus monkeys. Mestranol, ethynerone, mestranol-ethynerone, chloroethynyl norgestrel-mestranol, and anagestone acetate-mestranol combinations". The American Journal of Pathology 131 (2): 213–234. May 1988. PMID 3358452.
3. ↑ 3.0 3.1 "FDA studies of estrogen, progestogens, and estrogen/progestogen combinations in the dog and monkey". Journal of Toxicology and Environmental Health 3 (1–2): 179–193. September 1977. doi:10.1080/15287397709529557. PMID 411941. Bibcode: 1977JTEH....3..179G.
4. ↑ 4.0 4.1 "Mammary Neoplasia in Animals: Pathologic Aspects and the Effects of Contraceptive Steroids". Carcinogenic Hormones. 66. 1979. 129–160. doi:10.1007/978-3-642-81267-5_4. ISBN 978-3-540-08995-7.
5. ↑ "Interspecies Extrapolation". Low Dose Exposures in the Environment: Dose-Effect Relations and Risk Evaluation. Springer Science & Business Media. 11 November 2013. pp. 135–. ISBN 978-3-662-08422-9. https://books.google.com/books?id=eiL4CAAAQBAJ&pg=PA135.
6. ↑ "Development of progestogens.". Female Contraception: Update and Trends. Springer Science & Business Media. 6 December 2012. pp. 134–. ISBN 978-3-642-73790-9. https://books.google.com/books?id=LtT6CAAAQBAJ&pg=PA134.

* v
* t
* e

Progesterone receptor modulators

PR|

| Agonists|

* Progesterone derivatives: 3β-Dihydroprogesterone
* 5α-Dihydroprogesterone
* 9α-Bromo-11-ketoprogesterone
* 11-Dehydroprogesterone
* 11-Deoxycorticosterone
* 16α-Hydroxyprogesterone
* 20α-Dihydroprogesterone
* 20β-Dihydroprogesterone
* Dimepregnen
* Diosgenin
* P1-185
* Progesterone
* Progesterone 3-acetyl enol ether
* Quingestrone

* Retroprogesterone derivatives: 20α-Dihydrodydrogesterone
* 20α-Dihydrotrengestone
* DU-41164
* DU-41165
* Dydrogesterone
* Retroprogesterone
* Ro 6-3129
* Trengestone

* 17α-Substituted progesterone derivatives: 6α-Methyl-17α-bromoprogesterone
* 15β-Hydroxycyproterone acetate
* 16-Methylene-17α-hydroxyprogesterone acetate
* 17α-Bromoprogesterone
* 17α-Hydroxyprogesterone (hydroxyprogesterone)
* 17α-Methylprogesterone
* Acetomepregenol (mepregenol diacetate)
* Algestone
* Algestone acetonide
* Algestone acetophenide
* Anagestone
* Anagestone acetate
* Bromethenmadinone
* Bromethenmadinone acetate
* Butagest (buterol)
* Chlormadinone
* Chlormadinone acetate
* Chlormadinone caproate
* Chlormethenmadinone
* Chlormethenmadinone acetate
* Cismadinone
* Cismadinone acetate
* Clogestone
* Clogestone acetate
* Clomegestone
* Clomegestone acetate
* Cymegesolate
* Cyproterone acetate
* Delmadinone
* Delmadinone acetate
* Edogestrone
* Flugestone
* Flugestone acetate
* Fluorometholone
* Fluorometholone acetate
* Flumedroxone
* Flumedroxone acetate
* Fluoromedroxyprogesterone acetate
* Gestaclone
* Haloprogesterone
* Hydromadinone
* Hydromadinone acetate
* Hydroxyprogesterone acetate
* Hydroxyprogesterone caproate (hydroxyprogesterone hexanoate)
* Hydroxyprogesterone heptanoate (hydroxyprogesterone enanthate)
* Hydroxyprogesterone heptanoate benzilic acid hydrazone
* Mecigestone (pentarane B)
* Medrogestone
* Medroxyprogesterone
* Medroxyprogesterone acetate
* Medroxyprogesterone caproate
* Megestrol
* Megestrol acetate
* Megestrol caproate
* Melengestrol
* Melengestrol acetate
* Methenmadinone
* Methenmadinone acetate
* Methenmadinone caproate
* Mometasone
* Mometasone furoate
* Osaterone
* Osaterone acetate
* Pentagestrone
* Pentagestrone acetate
* Pentarane A
* Proligestone

* 19-Norprogesterone derivatives: 17α-Methyl-19-norprogesterone
* 18-Methylsegesterone acetate
* 19-Norprogesterone
* Amadinone
* Amadinone acetate
* Demegestone
* Fluoro ethyl norprogesterone
* Fluoro furanyl norprogesterone
* Gestadienol
* Gestadienol acetate
* Gestonorone acetate (gestronol acetate)
* Gestonorone caproate (gestronol hexanoate)
* Gestronol (gestonorone)
* Nomegestrol
* Nomegestrol acetate
* Norgestomet
* ORG-2058
* Oxogestone
* Oxogestone phenpropionate (xinogestone)
* Promegestone
* Segesterone
* Segesterone acetate (nestorone)
* Trimegestone

* Testosterone derivatives: Progestins: 6,6-Difluoronorethisterone
* 6,6-Difluoronorethisterone acetate
* 17α-Allyl-19-nortestosterone
* Allylestrenol
* Altrenogest
* Chloroethynylnorgestrel
* Cingestol
* Danazol
* Desogestrel
* Dienogest
* Ethisterone
* Ethynerone
* Etonogestrel
* Etynodiol
* Etynodiol diacetate
* Gestodene
* Gestrinone
* Levonorgestrel
* Levonorgestrel esters (e.g., levonorgestrel butanoate)
* Lynestrenol
* Lynestrenol phenylpropionate
* Metynodiol
* Metynodiol diacetate
* Norelgestromin
* Norethisterone (norethindrone)
* Norethisterone esters (e.g., norethisterone acetate, norethisterone enanthate)
* Noretynodrel
* Norgesterone
* Norgestimate
* Norgestrel
* Norgestrienone
* Norvinisterone
* Oxendolone
* Quingestanol
* Quingestanol acetate
* Tibolone
* Tigestol
* Tosagestin; Anabolic–androgenic steroids: 11β-Methyl-19-nortestosterone
* 11β-Methyl-19-nortestosterone dodecylcarbonate
* 19-Nor-5-androstenediol
* 19-Nor-5-androstenedione
* 19-Nordehydroepiandrosterone
* Bolandiol
* Bolandiol dipropionate
* Bolandione
* Dimethisterone
* Dienedione
* Dienolone
* Dimethandrolone
* Dimethandrolone buciclate
* Dimethandrolone dodecylcarbonate
* Dimethandrolone undecanoate
* Dimethyldienolone
* Dimethyltrienolone
* Ethyldienolone
* Ethylestrenol (ethylnandrol)
* Methyldienolone
* Metribolone (R-1881)
* Methoxydienone (methoxygonadiene)
* Mibolerone
* Nandrolone
* Nandrolone esters (e.g., nandrolone decanoate, nandrolone phenylpropionate)
* Norethandrolone
* Normethandrone (methylestrenolone, normethandrolone, normethisterone)
* RU-2309
* Tetrahydrogestrinone
* Trenbolone (trienolone)
* Trenbolone esters (e.g., trenbolone acetate, trenbolone enanthate)
* Trendione
* Trestolone
* Trestolone acetate

* Spirolactone derivatives: Canrenoic acid
* Canrenone
* Drospirenone
* Mespirenone
* Potassium canrenoate
* Prorenone
* SC-5233 (spirolactone)
* SC-8109
* Spironolactone
* Spirorenone

* Nonsteroidal: 3,8-Dihydrodiligustilide
* LG-2527
* LG-100128
* Riligustilide
* RWJ-26819
* RWJ-49853
* RWJ-60130
* Tanaproget
* ZM-182345

* Unknown: ORG-47241
* ORG-201745

|

Mixed
(SPRMs)|

* Steroidal: Dihydroethisterone
* 5α-Dihydrolevonorgestrel
* 5α-Dihydronorethisterone
* Asoprisnil
* Asoprisnil ecamate
* Guggulsterone
* J1042
* LG-120838
* Metapristone (RU-42633)
* Mifepristone (RU-486)
* ORF-9371
* ORF-9326
* ORG-31710
* ORG-33628
* RMI-12936
* Telapristone
* Ulipristal acetate
* Vilaprisan
* ZK-137316

* Nonsteroidal: Apigenin
* Kaempferol
* LG-120920
* Naringenin
* PRA-910
* Syringic acid

Antagonists|

* Steroidal: Aglepristone
* Lilopristone
* Lonaprisan
* Onapristone
* ORG-31710
* ORG-31806
* ORG-33628
* RTI 3021–022
* Toripristone
* Zanoterone

* Nonsteroidal: Darolutamide
* LG-001447
* LG-100127
* LG-100128
* LG-120830
* LG-121046
* Valproic acid
* ZM-150271
* ZM-172406

mPR
(PAQR)|

| Agonists|

* 5α-Dihydroprogesterone
* 5β-Dihydroprogesterone
* 11-Deoxycortisone (21-hydroxyprogesterone)
* 11-Deoxycortisol (17α,21-dihydroxyprogesterone)
* 17α-Hydroxyprogesterone
* Allopregnanolone
* Mifepristone
* Pregnenolone
* Progesterone

|

Antagonists|

* Mifepristone

See also
Receptor/signaling modulators
Progestogens and antiprogestogens
Androgen receptor modulators
Estrogen receptor modulators
List of progestogens

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Original source: https://en.wikipedia.org/wiki/Chloroethynylnorgestrel. Read more

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Retrieved from "https://handwiki.org/wiki/index.php?title=Chemistry:Chloroethynylnorgestrel&oldid=814744"
*[CID]: Compound ID
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template
*[PR]: Progesterone receptor
*[SPRMs]: Selective progesterone receptor modulators
*[mPR]: Membrane progesterone receptor
*[PAQR]: Progestin and adipoQ receptor