| abstract |
The invention provides a benzo-bicyclic compound shown as formula (I) in the description or its pharmaceutically acceptable salt, and also discloses a preparation method of the compound, a pharmaceutical composition comprising the benzo-bicyclic compound, and application of the pharmaceutical composition. The compound is phosphodiesterase (such as PDE4) inhibitor, and is suitable for treating diseases due to phosphodiesterase activity abnormality, for example chronic obstructive pulmonary disease (COPD) and the like. |