The invention relates to an antiprogestin 17-spirofuran-3'-ylidene steroid having the formula
wherein
R₁ is NR₂R₃, lower acyl, OH, SH, O-lower alkyl or S(O)n-lower alkyl wherein n is 0-2;
R₂ and R₃ are independently selected from hydrogen and lower alkyl;
R₄ is hydrogen or lower alkyl;
R₅ is O, (H,H), (H,OH), (H,O-lower acyl), or NOH;
R₆ and R₇ are both hydrogen, or one is hydrogen and the other lower alkyl; and
the twitched line represents an α or β bond.
本发明涉及一种抗孕激素 17-螺
呋喃-3'-亚基类
固醇,其式为
其中
R₁ 是 NR₂R₃、低级酰基、OH、SH、O-低级烷基或 S(O)n-低级烷基,其中 n 为 0-2;
R₂ 和 R₃ 独立选自氢和低级烷基;
R₄ 是氢或低级烷基;
R₅ 是 O、(H、H)、(H、OH)、(H、O-低级酰基)或 NOH;
R₆ 和 R₇ 都是氢,或一个是氢,另一个是低级烷基;以及
抽动线代表 α 或 β 键。