the retro steroids 17beta-hydroxy-5beta,9beta,10alpha-androstan-3-one and 5beta,9beta,10alpha-androstane-3,17-dione were good substrates for cortisone reductase in the presence of nadh , and the products corresponded to the respective 3beta-hydroxy compounds , in which the 3beta-hydroxyl group is axial and the absolute configuration is 3s .
C0038317
steroids
C0002854
androstane