Etonogestrel

Etonogestrel

Systematic (IUPAC) name
(8S,9R,10S,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
Pregnancy cat.	?
Legal status	Prescription Only (S4) (AU) POM (UK) ℞-only (US) ℞ Prescription only
Routes	Subdermal as slow-release implant
Pharmacokinetic data
Metabolism	Hepatic (P450 3A4)
Half-life	25 hours
Excretion	Urinary (majority) and fecal
Identifiers
CAS number	54048-10-1 Y
ATC code	G03AC08
PubChem	CID 21729469
DrugBank	APRD00766
ChemSpider	5292944 Y
UNII	304GTH6RNH Y
KEGG	D04104 Y
ChEBI	CHEBI:50777 Y
ChEMBL	CHEMBL1531 Y
Chemical data
Formula	C22H28O2
Mol. mass	324.457 g/mol
SMILES	eMolecules & PubChem
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
N (what is this?)  (verify)

Etonogestrel is a progestin used in hormonal contraceptives, most notably the subdermal implant Implanon and the contraceptive 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.

See also

• Progestin
• Progestagen