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.
本文提供了公式(I)的化合物,以及其药学上可接受的盐,其中取代基如规范中所披露的那样。这些化合物及含有它们的药物组合物对于治疗疾病如
COPD等具有用处。