A 3-keto-19-nor-pregnene of the formula ##STR1## wherein R is selected from the group consisting of hydroxy, acyloxy of an organic carboxylic acid, lower alkoxy, halogen and lower alkyl, R' is selected from the group consisting of hydrogen and halogen, or R and R' together form oxygen, R.sub.3 is selected from the group consisting of methyl, --OH and lower acyloxy of an organic carboxylic acid and the dotted line is an optional double bond in the 6,7-position useful for treating the symptoms of menopause in females.
一种
化学式为##STR1##的3-酮-19-去孕烯,其中R选择自羟基,有机
羧酸的酰氧基,低级烷氧基,卤素和低级烷基的群体,R'选择自氢和卤素,或R和R'一起形成氧,R3选择自甲基,--OH和有机
羧酸的低级酰氧基,虚线是可选的6,7-位置的双键,用于治疗女性更年期症状。