Etiocholanolone

Modify Date: 2025-08-20 04:07:50

Etiocholanolone Structure
Etiocholanolone structure
Common Name Etiocholanolone
CAS Number 53-42-9 Molecular Weight 290.440
Density 1.1±0.1 g/cm3 Boiling Point 413.1±45.0 °C at 760 mmHg
Molecular Formula C19H30O2 Melting Point 148~150°C (lit.)
MSDS Chinese USA Flash Point 176.4±21.3 °C

 Use of Etiocholanolone


Etiocholanolone (5β-Androsterone) is the excreted metabolite of testosterone and has anticonvulsant activity[1]. Etiocholanolone is a less potent neurosteroid positive allosteric modulator (PAM) of the GABAA receptor than its enantiomer form[2].

 Names

Name 3α-hydroxy-5β-androstan-17-one
Synonym More Synonyms

 Etiocholanolone Biological Activity

Description Etiocholanolone (5β-Androsterone) is the excreted metabolite of testosterone and has anticonvulsant activity[1]. Etiocholanolone is a less potent neurosteroid positive allosteric modulator (PAM) of the GABAA receptor than its enantiomer form[2].
Related Catalog
In Vitro Etiocholanolone (10 μM) coapplication with GABA leads to an increase in the relative frequency of long openings (fraction of OT3, site A2 effect), but it is ineffective at increasing the duration of long openings (site B effect) or at decreasing the relative frequency of the activation-related closed time component (site A1 effect)[2].
In Vivo Etiocholanolone (intraperitoneal injection; 0-109.1 mg/kg; single dose) exhibits ED50 values of 57.6 and 109.1 mg/kg in the 6-Hz and PTZ tests, respectively. Protective activity in the 6-Hz test of 5β,3α-A persists for 2 h and is shorter than ent-5β,3α-A treatment (3 hours) in mice[1].
References

[1]. Ping Li,et al. Natural and Enantiomeric Etiocholanolone Interact With Distinct Sites on the Rat alpha1beta2gamma2L GABAA Receptor. Mol Pharmacol. 2007 Jun;71(6):1582-90.

[2]. Dorota Zolkowska, et al. Anticonvulsant Potencies of the Enantiomers of the Neurosteroids Androsterone and Etiocholanolone Exceed Those of the Natural Forms. Psychopharmacology (Berl). 2014 Sep;231(17):3325-32.

 Chemical & Physical Properties

Density 1.1±0.1 g/cm3
Boiling Point 413.1±45.0 °C at 760 mmHg
Melting Point 148~150°C (lit.)
Molecular Formula C19H30O2
Molecular Weight 290.440
Flash Point 176.4±21.3 °C
Exact Mass 290.224579
PSA 37.30000
LogP 3.75
Vapour Pressure 0.0±2.2 mmHg at 25°C
Index of Refraction 1.536
InChIKey QGXBDMJGAMFCBF-BNSUEQOYSA-N
SMILES CC12CCC3C(CCC4CC(O)CCC43C)C1CCC2=O
Storage condition 2-8°C

 Safety Information

Personal Protective Equipment Eyeshields;Gloves;type N95 (US);type P1 (EN143) respirator filter
Hazard Codes F,Xn
Risk Phrases 11-20/21/22-36
Safety Phrases 16-36/37
RIDADR NONH for all modes of transport
WGK Germany 3

 Synthetic Route

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 EtiocholanoloneBioassay

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Name: Primary cell-based high-throughput screening assay for identification of compounds th...
Source: Johns Hopkins Ion Channel Center
Target: regulator of G-protein signaling 4 isoform 2 [Homo sapiens]
External Id: JHICC_RGS_Act_HTS
Name: Luminescence-based cell-based primary high throughput screening assay to identify ago...
Source: The Scripps Research Institute Molecular Screening Center
Target: mu-type opioid receptor isoform MOR-1 [Homo sapiens]
External Id: OPRM1-OPRD1_AG_LUMI_1536_1X%ACT PRUN
Name: QFRET-based biochemical primary high throughput screening assay to identify exosite i...
Source: The Scripps Research Institute Molecular Screening Center
Target: disintegrin and metalloproteinase domain-containing protein 17 preproprotein [Homo sapiens]
External Id: ADAM17_INH_QFRET_1536_1X%INH PRUN
Name: Binding affinity against testosterone-binding globulin (TeBG)
Source: ChEMBL
Target: Sex hormone-binding globulin
External Id: CHEMBL812631
Name: Inhibition of type-3 17 beta-hydroxysteroid dehydrogenase expressed in HEK293 cells a...
Source: ChEMBL
Target: 17-beta-hydroxysteroid dehydrogenase type 3
External Id: CHEMBL835420
Name: Fluorescence-based cell-based primary high throughput screening assay to identify ago...
Source: The Scripps Research Institute Molecular Screening Center
Target: muscarinic acetylcholine receptor M1 [Homo sapiens]
External Id: CHRM1_AG_FLUO8_1536_1X%ACT PRUN
Name: uHTS identification of small molecule activators of the adaptive arm of the Unfolded ...
Source: Burnham Center for Chemical Genomics
Target: N/A
External Id: BCCG-A405-UPR-XBP1-PrimaryAgonist-Assay
Name: Fluorescence polarization to screen for inhibitor that competite the binding of FadD2...
Source: Broad Institute
Target: FATTY-ACID-CoA LIGASE FADD28 (FATTY-ACID-CoA SYNTHETASE)
External Id: 2147-01_Inhibitor_SinglePoint_HTS_Activity
Name: Effect on the potentiation of muscimol-stimulated 36Cl- uptake in rat brain synaptone...
Source: ChEMBL
Target: Rattus norvegicus
External Id: CHEMBL795744
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 Synonyms

3a-Hydroxy-5b-androstane-17-one
3alpha-hydroxy-5beta-androstan-17-one
5β-Androsterone
(5b)-Androsterone
5-Isoandrosterone
3α-hydroxy-5β-androstane-17-one
5BETA-ANDROSTERONE
MFCD00064133
(3α,5β)-3-Hydroxyandrostan-17-one
ETIOCHOLANOLON
3α-Etiocholanolone
19-noretiocholanolone
ETIOCHOLANONE
3a-Etiocholanolone
3α-hydroxy-5β-androstan-17-one
5b-Androsterone
Etiocholan-3a-ol-17-one
Etiocholan-3α-ol-17-one
Etiocholan-3.α.-ol-17-one
EINECS 200-835-2
Etiocholanolone
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