Novel compounds which are effective PDE IV inhibitors are disclosed. These compounds have the general structure of: ##STR1## where R.sub.1, R.sub.2, R.sub.3, R.sub.4, X.sub.1, X.sub.2 and Z are described herein. The compounds possess improved PDE IV inhibition as compared to rolipram as well as with improved selectivity with regard to PDE III inhibition. Pharmaceutical compositions containing the same and methods of treatment are also disclosed.
本发明揭示了有效的PDE IV
抑制剂的新型化合物。这些化合物具有以下的一般结构:##
STR1## 其中R.sub.1、R.sub.2、R.sub.3、R.sub.4、X.sub.1、X.sub.2和Z的含义如本文所述。与Rolipram相比,这些化合物具有更好的PDE IV抑制作用,并具有更好的选择性,不会抑制PDE III。本发明还揭示了含有这些化合物的药物组合物和治疗方法。