| 摘要 |
The present invention provides class of compounds of formula I <IMAGE> (I) and their pharmaceutically acceptable salts in which R1 is hydrogen, hydroxy, alkoxy, alkoxycarbonyloxy, alkylcarbonyloxy, arylcarbonyloxy; R2 is hydrogen, hydroxy, alkoxy, alkoxycarbonyloxy, alkylcarbonyloxy, alkylsulfonyloxy, arylcarbonyloxy, Cl or Br; R3 and R4 are independently C1-C4 alkyl, or combine with the nitrogen atom to which they are attached to form a pyrrolidino, piperidino, or hexamethyleneimino ring; X is selected from <IMAGE> <IMAGE> and Y is -CO-, -CHOH-, or -CH2-. The compounds and pharmaceutical compositions containing the compounds, either alone or in combination with either progestin or estrogen, are useful for alleviating the symptoms of osteoporosis, cardiovascular related pathological conditions such as hyperlipidemia, and estrogen-dependent cancer. The compounds of the present invention also are useful for inhibiting uterine fibroid disease and endometriosis in women and aortal smooth muscle cell proliferation, particularly restenosis, in humans.
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