Pregnane

Pregnane, also known as 17β-ethylandrostane or as 10β,13β-dimethyl-17β-ethylgonane, is a C21 steroid and, indirectly, a parent of progesterone.It is a parent hydrocarbon for two series of steroids stemming from 5α-pregnane (originally allopregnane) and 5β-pregnane (17β-ethyletiocholane).5β-Pregnane is the parent of pregnanediones, pregnanolones, and pregnanediols, and is found largely in urine as a metabolic product of 5β-pregnane compounds.Pregnanes are steroid derivatives with carbons present at positions 1 through 21.Most biologically significant pregnane derivatives fall into one of two groups: pregnenes and pregnadienes.
Skeletal formula of pregnane
Ball-and-stick model of the pregnane molecule
Steroid nomenclature: Pregnanes have carbons 1 through 21.
Cortisone
Cyproterone acetate
IUPAC nameCAS NumberChemSpiderPubChemCompTox DashboardSMILESChemical formulaMolar massDensitystandard statesteroidparentprogesteronehydrocarbon5α-pregnaneallopregnane5β-pregnaneetiocholanegonanepregnanedionespregnanolonespregnanediolsmetaboliccompoundspregnenespregnadienespregnatrienesPregneneCortisonedouble bondHydrocortisonePregnadieneCyproterone acetatedouble bondsDanazolFluocinonidePregnanedionePregnanediol19-NorpregnaneAndrostaneEstraneInternational Union of Pure and Applied ChemistryThe Royal Society of ChemistryMedical Subject HeadingsEstreneEstratrieneEstratrienoloneEstratrienediolEstratrienetriolAndrosteneAndrostadieneAndrostenolAndrostenoneAndrostanediolAndrostenediolAndrostanedioneAndrostenedioneAndrostenetrioneAndrostanoloneAndrostenoloneAndrostadienolAndrostadienonePregnatrienePregnanetriolPregnenedioneCardanolideCholaneBile acidCholestaneFunctional group17-KetosteroidHydroxysteroidHalogenated steroidNorsteroidSecosteroidAzasteroid