摘要:
This invention relates to novel trans cyclopentanyl purine analogs of the formula (1)
wherein the substituent in the 3-position on the cyclopentanyl ring is in the Trans configuration relative to the bicyclic substituent, Y₃, Y₅ Y₇, Y₈ and Y₉ are each independently nitrogen or a CH group, R is a hydrogen, a C₁-C₇ alkyl acyl or aryl acyl, Q is NH₂, halogen or hydrogen, Z is hydrogen, halogen, or NH₂; or a pharmaceutically-acceptable salt thereof, and to their use as immunosuppressants.