Norgestrel

Norgestrel
Systematic (IUPAC) name
(8R,9S,10R,13S,14S,17S)- 13-ethyl-17-ethynyl-17-hydroxy- 1,2,6,7,8,9,10,11,12,14,15, 16- dodecahydrocyclopenta[a]phenanthren-3-one
Identifiers
CAS number	6533-00-2
ATC code	G03AC03
PubChem	13109
DrugBank	APRD00106
Chemical data
Formula	C21H28O2
Mol. mass	312.446 g/mol
Pharmacokinetic data
Bioavailability	?
Metabolism	?
Half life	5-14 hours
Excretion	?
Therapeutic considerations
Pregnancy cat.	?
Legal status
Routes	?

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Norgestrel is a progestin used in hormonal contraceptives. Norgestrel is a mixture of two stereoisomers, dextro-norgestrel (CAS# 797-64-8) and levo-norgestrel (CAS# 797-63-7). Only levonorgestrel is biologically active. Therefore, while some medications may contain dextronorgestrel, they are often labeled in terms of their levonorgestrel content only, ignoring the inert isomer.

See also

• Levonorgestrel
• Progestin