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P8887

Sigma-Aldrich

5α-Pregnan-3α-ol-20-one

solid

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Synonym(s):
3α-Hydroxy-5α-pregnan-20-one, 3α-OH-DHP, Allopregnan-3α-ol-20-one, Allopregnanolone, Brexanolone
Empirical Formula (Hill Notation):
C21H34O2
CAS Number:
Molecular Weight:
318.49
Beilstein/REAXYS Number:
3211363
MDL number:
PubChem Substance ID:
NACRES:
NA.77

form

solid

Quality Level

color

white

solubility

DMSO: 5 mg/mL
methanol: soluble

SMILES string

[H][C@@]12CC[C@@]3([H])[C@]4([H])CC[C@H](C(C)=O)[C@@]4(C)CC[C@]3([H])[C@@]1(C)CC[C@@H](O)C2

InChI

1S/C21H34O2/c1-13(22)17-6-7-18-16-5-4-14-12-15(23)8-10-20(14,2)19(16)9-11-21(17,18)3/h14-19,23H,4-12H2,1-3H3/t14-,15+,16-,17+,18-,19-,20-,21+/m0/s1

InChI key

AURFZBICLPNKBZ-SYBPFIFISA-N

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vibrant-m

P8887

5α-Pregnan-3α-ol-20-one

vibrant-m

E4875

16α,17α-Epoxypregnenolone

vibrant-m

P2016

3α,21-Dihydroxy-5α-pregnan-20-one

vibrant-m

P8629

5β-Pregnane-3α,17α,20α-triol

form

solid

form

-

form

powder

form

powder

solubility

DMSO: 5 mg/mL, methanol: soluble

solubility

-

solubility

-

solubility

chloroform: methanol (1:1): 19.60-20.40 mg/mL, clear, colorless

color

white

color

-

color

-

color

-

Gene Information

human ... GABRA1(2554), GABRA2(2555), GABRA3(2556), GABRA4(2557), GABRA5(2558), GABRA6(2559), GABRB1(2560), GABRB2(2561), GABRB3(2562), GABRD(2563), GABRE(2564), GABRG1(2565), GABRG2(2566), GABRG3(2567), GABRP(2568), GABRQ(55879)
mouse ... Gabrg2(14406)
rat ... Gabra1(29705), Gabra2(29706), Gabrg2(29709)

Gene Information

-

Gene Information

human ... GABRA1(2554), GABRA2(2555), GABRA3(2556), GABRA4(2557), GABRA5(2558), GABRA6(2559), GABRB1(2560), GABRB2(2561), GABRB3(2562)
rat ... Gabra2(29706)

Gene Information

-

Application

5α-Pregnan-3α-ol-20-one has been used:
  • as an allosteric modulator of GABAA receptors in mice
  • a neuroprotective steroid in transgenic mice
  • a neurosteroid

Biochem/physiol Actions

5α-Pregnan-3α-ol-20-one is a positive allosteric modulator of γ-aminobutyric acid (GABA) A receptor (GABAA). It is also called pregnan and during pregnancy it modulates the atrial volume receptors transducer properties. During estrus cycle, 5α-Pregnan-3α-ol-20-one or allopregnanolone levels changes in hypothalamus. It is present in high levels post adrenalectomy and gonadectomy.

Features and Benefits

This compound is a featured product for Neuroscience research. Click here to discover more featured Neuroscience products. Learn more about bioactive small molecules for other areas of research at sigma.com/discover-bsm.
This compound is featured on the GABAA Receptors page of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)


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