11.alpha.-Corticosterone 600-67-9 Epicorticosterone NSC82858 Pregn-4-en-11.alpha.,21-diol-3,20-dione Pregn-4-ene-3,20-dione, 11,21-dihydroxy-, (11.alpha.)- Pregn-4-ene-3,20-dione, 11.alpha.,21-dihydroxy-