The invention includes a compound of formula I:
wherein R
1
, Y, A, n, R
4
and Z have any of the values described herein, as well as salts of such compounds, compositions comprising such compounds, and therapeutic methods that comprise the administration of such compounds. The compounds are inhibitors of PDE4 function and are useful for improving cognitive function and/or treating cognitive disorders or impairment, traumatic and/or ischemic injuries of the central and peripheral nervous system and/or psychiatric disorders in animals, especially humans.
                            本发明涉及一种I式化合物:其中R1,Y,A,n,R4和Z具有以下任一数值,以及这些化合物的盐,包含这些化合物的组合物和包括这些化合物的治疗方法。这些化合物是PDE4功能的
抑制剂,可用于改善动物(尤其是人类)的认知功能和/或治疗认知障碍或损伤、中枢和外周神经系统的创伤和/或缺血性损伤以及/或精神障碍。