Pregnan

Structural formula
	Pregnan (CAS number 24909-91-9)
General
Surname	Pregnan
other names	10 β , 13 β -dimethyl-17 β -ethylgonane; 17 β- Ethylandrostane;
Molecular formula	C 21 H 36
External identifiers / databases
PubChem	6857422
ChemSpider	5256760
Wikidata	Q2700511
properties
Molar mass	288.51 g mol −1
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Pregnan is a collective name for certain polycyclic aliphatic hydrocarbons that are among the basic components of steroids , the steranes . It consists of a tetracyclic skeleton with three fused cyclohexane rings and one fused cyclopentane ring. It differs from the Gonan in that it has two additional methyl groups and one ethyl group . There are two different pregnanes which differ in stereochemistry in the 5-position. These are 5 α -Pregnane and 5 β- Pregnane:

5 α- Pregnane (CAS number 641-85-0)

5 β -Pregnam (CAS number 481-26-5)

Pregnandione , pregnenolone and pregnanediol , among others, are derived from 5 β- pregnane .

Web links

Commons : Pregnan - collection of images, videos and audio files

Entry on Pregnan . In: P. J. Linstrom, W. G. Mallard (Eds.): NIST Chemistry WebBook, NIST Standard Reference Database Number 69 . National Institute of Standards and Technology , Gaithersburg MD

Individual evidence

↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[NV-1] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.