17α-Hydroxypregnenolone

17α-Hydroxypregnenolone is a pregnane (C21) steroid that is obtained by hydroxylation of pregnenolone at the C17α position. This step is performed by the mitochondrial cytochrome P450 enzyme 17α-hydroxylase (CYP17A1) that is present in the adrenal and gonads. Peak levels are reached in humans at the end of puberty and then decline. High levels are also achieved during pregnancy. It is also a known neuromodulator.

17α-Hydroxypregnenolone
Pharmacokinetic data
MetabolismAdrenal, Gonads
Identifiers
  • 3β,17α-dihydroxypregn-5-en-20-one
CAS Number
PubChem CID
ChemSpider
UNII
ChEBI
CompTox Dashboard (EPA)
ECHA InfoCard100.006.239
Chemical and physical data
FormulaC21H32O3
Molar mass332.484 g·mol−1
3D model (JSmol)
Melting point268 °C (514 °F)
SMILES
  • CC[C@@]2(O)CC[C@H]1[C@@H]3CCC4CC(O)C(=O)C[C@]4(C)[C@H]3CC[C@@]12C
  • InChI=1S/C21H34O3/c1-4-21(24)10-8-16-14-6-5-13-11-17(22)18(23)12-19(13,2)15(14)7-9-20(16,21)3/h13-17,22,24H,4-12H2,1-3H3/t13?,14-,15+,16+,17?,19+,20+,21-/m1/s1 Y
  • Key:QPLFSAZMHUAMKE-FOCOMJRBSA-N Y
 NY (what is this?)  (verify)
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