Compounds of formula (I)
in free or salt or solvate form, wherein X has the meaning indicated in the specification, are useful for treating conditions that are prevented or alleviated by activation of the β
2
-adrenoreceptor. Pharmaceutical compositions that contain the compounds and processes for preparing the compounds are also described.
式(I)的化合物,包括自由形式、盐形式或溶剂合物形式,其中X的含义如规范中所示,可用于治疗通过激活β2-
肾上腺素能受体预防或缓解的疾病。还描述了包含该化合物的制药组合物和制备该化合物的过程。