雌甾-4,9-二烯-3,17-二酮

(8R,9S,13S,14S,17S)-17-羟基-13-甲基-2,4,6,7,8,9,11,12,14,15,16,17-十二氢-1H-环戊并[a]菲-3-酮

(17B)-3-甲氧基雌甾-2,5(10)-二烯-17-醇

3-缩酮

17β-hydroxyestra-5(10),9(11)-diene-3-one 3-ethylene ketal