The present invention relates to novel 2-amino-5-oxo-5H-[1]benzopyrano[2,3-b]pyridine-3-carboxylic acid derivatives useful for prophylaxis and therapy of allergic diseases such as allergic asthma, allergic dermatitis and hay fever, which have the following formula:
wherein A is
, R1 and R2 are independently hydrogen or lower alkyl and m is 0 or 1, with the proviso that when m is 1, R1 is hydrogen) or R-CO- (R has the same meaning as defined above), or a physiologically acceptable salt thereof, and to a method for preparing the same.
本发明涉及新型 2-
氨基-5-氧代-5H-[1]苯并
吡喃并[2,3-b]
吡啶-3-
羧酸衍
生物,该衍
生物可用于预防和治疗过敏性疾病,如过敏性哮喘、过敏性皮炎和花粉症,其分子式如下: 其中 A 为 ,R1 和 R2 独立地为氢或低级烷基,m 为 0 或 1,但当 m 为 1 时,R1 为氢)或 R-CO-(R 的含义与上述定义相同),或其生理上可接受的盐,以及制备方法。