英文别名Progesterone Impurity 2; Progesterone EP Impurity B; 4-PREGNEN-20-ALPHA-OL-3-ONE; (20s)-20-hydroxypregn-4-en-3-one; 20-ALPHA-DIHYDROPROGESTERONE; 20-ALPHA-HYDROXY-4-PREGNEN-3-ONE; (20s)-pregn-4-en-3-on; 20(s)-hydroxyprogesterone; 20-alpha-hydroxydihydroprogesterone; 20alpha-Dihydroprogesterone; 20.α.-Hydroxydihydroprogesterone; 20(S)-Hydroxypregn-4-en-3-one 
