REMEDIES/PREVENTIVES FOR RESPIRATORY DISEASES

摘要

Remedies/preventives for respiratory diseases containing as the active ingredient compounds represented by general formula (1) or salts thereof: (1)(wherein R<1> represents linear, branched or cyclic C1-10 alkyl; and R<2> represents hydrogen, halogeno, substituted alkyl, optionally substituted amino, carboxy, alkoxycarbonyl, carbamoyl or alkylcarbamoyl). These compounds have excellent bronchodilating and respiratory tract contraction-inhibitory effects.