The invention relates to a steroid derivative which steroidal skeleton is bound at carbon atom 17 to a spiromethylene ring of the formula:
wherein Ra and Rb are independently selected from the group consisting of hydrogen, methyl, and halogen; m is 1 or 2; and the asterisk denotes carbon atom 2 of the spiromethylene ring which is carbon atom 17 (or carbon atom 17a of a homosteroid skeleton) of the steroid. The steroids have progestational or antiprogestational activity.
本发明涉及一种类
固醇衍
生物,其类
固醇骨架在碳原子 17 上与式中的螺旋亚甲基环结合:
其中 Ra 和 Rb 独立地选自氢、甲基和卤素组成的组;m 为 1 或 2;星号表示螺旋亚甲基环的碳原子 2,即类
固醇的碳原子 17(或同型类
固醇骨架的碳原子 17a)。类
固醇具有孕激素或抗孕激素活性。