Compounds of formula (I) in free or salt form, wherein -C-Y-, R1 and R2 are G have the meanings as indicated in the specification, are useful for treating conditions that are prevented or alleviated by activation of the (β2-adrenoreceptor. Pharmaceutical compositions that contain the compounds and a process for preparing the compounds are also described.
式(I)的化合物以自由形式或盐形式存在,其中-C-Y-,R1和R2是G,其含义如规范中所示,可用于治疗通过激活β2-
肾上腺素受体预防或缓解的疾病。还描述了含有这些化合物的药物组合物以及制备这些化合物的方法。