Compounds of formula I
in free or salt form, wherein R1, R2 and R3 have the meanings as indicated in the specification, are useful for treating conditions mediated by of phosphodiesterase type 4 or the down-regulation or inhibition of TNF-α release, particularly obstructive or inflammatory airways diseases. Pharmaceutical compositions that contain the compounds and processes for preparing the compounds are also described.
公式I的化合物,无论是自由形式还是盐形式,其中R1、R2和R3的含义如规范中所示,可用于治疗由
磷酸二酯酶4型介导或TNF-α释放的下调或抑制引起的情况,特别是阻塞性或炎症性气道疾病。还描述了包含这些化合物的制药组合物和制备这些化合物的方法。