| 摘要 |
This disclosure relates to the aspermatogenesis activity of compounds of the following formula: <IMAGE> where R1 and R2 each independently represent hydrogen, halo having an atomic weight of about 19 to 36, lower alkyl having 1 to 4 carbon atoms, lower alkoxy having 1 to 4 carbon atoms, trifluoromethyl, or R1 is <IMAGE> and R2 is hydrogen, wherein R7 and R8 are each independently hydrogen or lower alkyl having 1 to 2 carbon atoms, n is 0 or 1, and R3, R4, R5 and R6 each independently represent lower alkyl having 1 to 2 carbon atoms or a pharmaceutically acceptable salt thereof.
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