Compounds, pyridine N-oxides, and pharmaceutically acceptable salts of formula (I) are useful as inhibitors of the phosphodiesterase 4 (PDE4) enzyme and for preventing and/or treating diseases of the respiratory tract characterized by airway obstruction, such as asthma or COPD.
化合物,
吡啶N-
氧化物和具有以下结构的药学上可接受的盐(I)的盐对于抑制
磷酸二酯酶4(PDE4)酶并预防和/或治疗呼吸道疾病,其特征是气道阻塞,如哮喘或
COPD,是有用的。