Etonogestrel

Etonogestrel
Systematic (IUPAC) name

(8S,9S,10R,13S,14S,17R)-13-Ethyl-17-ethynyl-17-hydroxy-11-methylidene-2,6,7,8,9,10,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthren-3-one
Clinical data
AHFS/Drugs.com	Multum Consumer Information
MedlinePlus	a604032
Routes of administration	Subdermal as slow-release implant
Legal status
Legal status	AU: S4 (Prescription only) UK: POM (Prescription only) US: ℞-only ℞ (Prescription only)
Pharmacokinetic data
Metabolism	Hepatic (P450 3A4)
Biological half-life	25 hours
Excretion	Urinary (majority) and fecal
Identifiers
CAS Number	54048-10-1^Y
ATC code	G03AC08 (WHO)
PubChem	CID 21729469
IUPHAR/BPS	7590
DrugBank	DB00294^Y
ChemSpider	5292944^Y
UNII	304GTH6RNH^Y
KEGG	D04104^Y
ChEBI	CHEBI:50777^Y
ChEMBL	CHEMBL1531^Y
Chemical data
Formula	C₂₂H₂₈O₂
Molar mass	324.457 g/mol
SMILES O=C3\C=C2\CC[C@H]1[C@H]4[C@](CC)(C/C(=C)[C@@H]1[C@H]2CC3)[C@@](C#C)(O)CC4
InChI InChI=1S/C22H28O2/c1-4-21-13-14(3)20-17-9-7-16(23)12-15(17)6-8-18(20)19(21)10-11-22(21,24)5-2/h2,12,17-20,24H,3-4,6-11,13H2,1H3/t17-,18-,19-,20+,21-,22-/m0/s1^Y Key:GCKFUYQCUCGESZ-BPIQYHPVSA-N^Y
(verify)

Etonogestrel is a steroidal progestin used in hormonal contraceptives, most notably the subdermal implant Nexplanon and the vaginal ring NuvaRing.

Etonogestrel is the active metabolite of the inactive prodrug desogestrel, one of two third-generation progestins found in some epidemiological studies of combined oral contraceptive pills to be associated with a higher risk of venous thrombosis than combined oral contraceptive pills containing certain second-generation progestins. Because hormones are released continuously from NuvaRing, peak and total estrogen and progestin doses are significantly lower than with combined oral contraceptives, although it is not known whether this lowers the risk of blood clots. It is effective within the first 24 hours.

References

Progestogens and antiprogestogens

Progestogens

Retroprogesterone	Dydrogesterone Trengestone

17α-Hydroxyprogesterone	Algestone Algestone acetophenide Chlormadinone acetate Cyproterone acetate Delmadinone acetate Hydroxyprogesterone acetate Hydroxyprogesterone caproate Hydroxyprogesterone heptanoate Medroxyprogesterone Medroxyprogesterone acetate^# Megestrol acetate Melengestrol acetate Other substitutions: Haloprogesterone (17α-bromo) Medrogestone (17α-methyl) Proligestone (14α,17α-propylidenedioxy)

19-Norprogesterone	Demegestone Gestonorone caproate Nestorone Nomegestrol acetate Norgestomet Promegestone Trimegestone

17α-Ethynyltestosterone	Dimethisterone Ethisterone

19-Nortestosterone	Allylestrenol Altrenogest Desogestrel Dienogest Etonogestrel Etynodiol diacetate Gestodene Gestrinone Levonorgestrel^# Lynestrenol Norelgestromine Norethandrolone Norethisterone (norethindrone)^# Norethisterone acetate Norethisterone enanthate Noretynodrel Norgesterone Norgestimate Norgestrel Norgestrienone Normethandrone (methylestrenolone) Norvinisterone Quingestanol acetate Tibolone Trenbolone

17α-Spirolactone	Canrenone Drospirenone Potassium canrenoate Spironolactone

Others	Progesterone Non-steroidal: Tanaproget^§

SPRMs /
antiprogestogens

^#WHO-EM
^‡Withdrawn from market
Clinical trials:
- ^†Phase III
- ^§Never to phase III

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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