| 摘要 |
(57) Disclosed are new compounds of general formula (I), in which one of the substituents R1 and R2 is a methoxy, diflouromethoxy or ethoxy group and the other is a C4-C7 cycloalkoxy or C3-C7 cycloalkylmethoxy group, as well as the salts formed by these compounds with bases. The compounds are suitable for use as active ingredients in bronchospasmolytics.
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