3alpha(or 20beta)-hydroxysteroid dehydrogenase; cortisone reductase; (R)-20-hydroxysteroid dehydrogenase; 20beta-hydroxy steroid dehydrogenase; Delta4-3-ketosteroid hydrogenase; 20beta-hydroxysteroid dehydrogenase; 3alpha,20beta-hydroxysteroid:NAD+- • • •