3.alpha.,17,21-Trihydroxypregnane-11,20-dione 5.beta.-Pregnane-11,20-dione, 3.alpha.,17,21-trihydroxy- 53-05-4 Ba 2681 Cortisone, tetrahydro- NSC76984 Pregnane-11,20-dione, 3,17,21-trihydroxy-, (3.alpha.,5.beta.)- THE Tetrahydro E Tetrahydrocompound E Tetrahydrocortisone Urocortisone