| Synonyms: | 3alpha,17,21-trihydroxy-5alpha-pregnan-20-one;5-ALPHA-PREGNAN-3-ALPHA, 17,21-TRIOL-20-ONE;ALLOTETRAHYDRO S;ALLOTETRAHYDRO SUBSTANCE 'S';ALLO TH 'S';1-[(3R,5S,8R,9S,10S,13S,14S,17R)-3,17-dihydroxy-10,13-dimethyl-1,2,3,4,5,6,7,8,9,11,12,14,15,16-tetradecahydrocyclopenta[a]phenanthren-17-yl]-2-hydroxyethanone;1-[(3R,5S,8R,9S,10S,13S,14S,17R)-3,17-dihydroxy-10,13-dimethyl-1,2,3,4,5,6,7,8,9,11,12,14,15,16-tetradecahydrocyclopenta[a]phenanthren-17-yl]-2-hydroxy-ethanone;Allotetrahydro |