| 摘要 |
<p>Compounds of formula (I) wherein R1 is hydrogen or an alkyl group; R2 is hydrogen or an alkyl group; or R1, R2 and C20 together are cyclopropyl; A is a, b, c or d; R3 is alkyl, hydroxy-alkyl or fluoroalkyl; and R4 is alkyl, hydroxy-alkyl or fluoroalkyl which are useful in the treatment of breast cancer, prostate cancer, myeloid leukemia benign prostate growth, baldness and osteoporosis.</p> |
