(20S)-20-Hydroxypregn-4-en-3-one 145-14-2 20(S)-Hydroxyprogesterone 20-alpha-Dihydroprogesterone 20-alpha-Hydroxydihydroprogesterone 20-alpha-Hydroxyprogesterone 20-alpha-Progerol 20alpha-Dihydroprogesterone 20alpha-Dihydroprognenolone 20alpha-Hydroxydihydroprogesterone 20alpha-Hydroxypreg-4-en-3-one 20alpha-Hydroxypregnen-2-one 20alpha-Progerol 4-08-00-01018 (Beilstein Handbook Reference) BRN 2220567 DIHYDROPROGESTERONE Dihydrogesterone EINECS 205-649-5 NSC 68630 Pregn-4-en-3-one, 20-alpha-hydroxy- Pregn-4-en-3-one, 20-hydroxy-, (20S)- (9CI) Pregn-4-en-3-one, 20alpha-hydroxy- (8CI) Progesterol-20-alpha