3-alpha,5-alpha-Pregnanolone 3-alpha,5-alpha-Tetrahydroprogesterone 3-alpha-Hydroxy-5-alpha-pregnan-20-one 3alpha-Hydroxy-5alpha-dihydroprogesterone 4-08-00-00664 (Beilstein Handbook Reference) 5-alpha-Pregnan-20-one, 3-alpha-hydroxy- 516-54-1 5alpha-Pregnan-3alpha-ol-20-one Allopregnan-3alpha-ol-20-one Allotetrahydroprogesterone BRN 3211363 Pregnan-20-one, 3-hydroxy-, (3-alpha,5-alpha)- (9CI)