| 摘要 |
The invention relates to 20-aralkyl-5.alpha.-pregnane derivative having general formula (I), or a pharmaceutically acceptable salt thereof, wherein R1 is (H,OR), (H,OSO3H) or NOR; R is H, (C1-6)alkyl or (C1-6)acyl; each of R2 and R3 is independently hydrogen or (C1-6)alkyl; X is a straight chain divalent C18 hydrocarbon radical, optionally comprising a double or a triple bond; or X is -(CH2)m-CR7R8-; m = 0-4; at least one of R7 and R8 is (C1-4)alkyl, hydroxy, (C1-4)alkoxy or halogen; the other, if present, being hydrogen; or R7 and R8 together represent O or NOR'; R' is H, (C1-6)alkyl or (C1-6)acyl; each of R4, R5 and R6 is independently hydrogen, hydroxy, (C1-4)alkoxy, halogen, NR9, R10 or (C1-4)alkyl, optionally substituted by hydroxy, alkoxy, halogen or oxo; each of R9 and R10 is independently hydrogen or (C1-4)alkyl; and the dotted lines indicate a .DELTA.7 or a .DELTA.8 double bond, or a pair of conjugated double bonds selected from .DELTA.7,14, .DELTA.8,14 and .DELTA.6,8(14). The compounds of the invention have meiosis activating activity and can be used for the control of fertility.
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