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)的化合物在自由或盐或溶剂化合物的形式下,其中X具有规范中所指的含义,对于治疗通过激活β2-
肾上腺素受体预防或缓解的疾病是有用的。还描述了含有这些化合物的制药组合物和制备这些化合物的过程。