128-21-2 3-hydroxypregnan-20-one 5-BETA-PREGNAN,3-ALPHA-OL,20-ONE InChI=1/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,4-12H2,1-3H pregnan-20-one, 3-hydroxy-