Estran

Structural formula
General
Surname	Estran
other names	13 β- methylgonane Ostran
Molecular formula	C 18 H 30
External identifiers / databases
CAS number 24749-37-9 PubChem 12313694 ChemSpider 11179505 Wikidata Q962705
properties
Molar mass	246.44 g mol −1
safety instructions
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 .

Estran is a polycyclic aliphatic hydrocarbon and is one of 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 an additional methyl group .

The female sex hormones ( estrogens ) are derived from estran . Examples are estrone and estradiol .

Isomers

The two cyclohexane rings A and B can be cis- or trans -linked analogously to decalin , so that the configuration isomers 5α-estrane and 5β-estrane result.

Configuration isomers of androsterane
5α-estrane	5β-estrane

The physiologically active estrane derivatives are triply unsaturated in ring A.

Web links

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

Individual evidence

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.
2. ↑ ^{a b} entry on Estran. In: Römpp Online . Georg Thieme Verlag, accessed on June 22, 2020.
3. ↑ External identifiers or database links for 5α-estran : CAS number: 517-13-5, PubChem : 6857465 , ChemSpider : 5256802 , Wikidata : Q27109326 .
4. ↑ External identifiers or database links for 5β-estran : CAS number: 517-12-4, PubChem : 6857457 , ChemSpider : 5256794 , Wikidata : Q27109335 .
5. ↑ Eberhard Breitmeier, Günther Jung: Organic chemistry . Basics, substance classes, reactions, concepts, molecular structure. 5th edition. Georg Thieme Verlag, Stuttgart 2005, ISBN 3-13-541505-8 , p. 944 .