申请人:HOFFMANN LA ROCHE
                            
                            
                                公开号:WO2009109483A1
                            
                            
                                公开(公告)日:2009-09-11
                            
                            Provided herein are compounds of the formula (I), as well as pharmaceutically acceptable salts thereof, wherein the substituents are as those disclosed in the specification. These compounds, and the pharmaceutical compositions containing them, are useful for the treatment of diseases such as, for example, COPD.