13563-60-5 17-Hydroxy-19-nor-17alpha-pregna-5(10),20-dien-3-on 17alpha-Vinyl-5(10)-estrene-17beta-ol-3-one 19-Nor-17alpha-pregna-5(10),20-dien-3-one, 17-hydroxy- (8CI) 19-Norpregna-5(10),20-dien-3-one, 17-hydroxy-, (17alpha)- (9CI) NSC 72160 Norgesterona [Spanish] Norgesterone Norgesterone [INN] Norgesteronum [Latin]