| 摘要 |
<p>Compounds represented by general formula (1) or acid addition salts thereof and remedies/preventives for asthma, antiinflammatory agents or bronchodilating agents containing the same as the active ingredient. In said formula, A represents optionally alkylated linear C2-3 alkylene; B represents linear C1-3 alkylene optionally substituted by alkyl or cyclopropyl or a single bond; R1 represents optionally alkylated linear C1-6 alkyl, hydrogen, allyl, methoxyethyl, benzyl, etc.; R2 and R3 represent each hydrogen or alkyl, or R2 and R3 may form together optionally alkylated linear C2-4 alkylene; and R4 represents hydrogen, etc.</p> |
