| 摘要 |
The invention provides 15&bgr;-substituted steroidal compounds having selective estrogen receptor activity according to Formula (I) wherein, R1 is H, C1-5 alkyl, C1-12 acyl, di-(C1-5 alkyl)aminocarbonyl, (C1-5alkyl)oxycarbonyl or sulfamoyl, R2 is H, C1-3alkyl, C2-3alkenyl or C2-3alkynyl, each of which may be optionally substituted with a halogen, R3 is C1-2alkyl, ethenyl or ethynyl, each of which may be optionally substituted with a halogen, and R4 is H or C1-12 acyl.
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