17-Hydroxypregna-1,4-diene-3,20-dione 2477-61-4 4-08-00-02420 (Beilstein Handbook Reference) BRN 2223189 NSC 9786 Pregna-1,4-diene-3,20-dione, 17-hydroxy- delta(sup 1,4)-Pregnadiene-17-alpha-ol-3,20-dione