11-alpha-Hydroxypregn-4-ene-3,20-dione 11alpha-Hydroxyprogesterone 80-75-1 EINECS 201-306-9 NSC 3350 Pregn-4-ene-3,20-dione, 11-hydroxy-, (11alpha)- (9CI) Pregn-4-ene-3,20-dione, 11alpha-hydroxy- (8CI) Progesterone, 11alpha-hydroxy- U 0384