申请人:Chugai Seiyaku Kabushiki Kaisha
公开号:US04691018A1
公开(公告)日:1987-09-01
A compound of the formula ##STR1## wherein R.sub.1 is a hydrogen atom or a lower alkyl group which may be substituted with hydroxy, lower alkyl or di-lower alkylamino; R.sub.2 is a hydrogen atom, an amino group or a lower alkylamino group; and R.sub.3 is a lower alkyl group, and a non-toxic salt thereof, and a process for preparing the same are disclosed. The compound and the salts thereof exhibit anti-allergic effects by the two different mechanisms and are expected to be useful as drugs for treating allergic diseases such as asthma, pollen allergy, atopic dermatitis and the like.
本发明公开了一种式子为##STR1##的化合物,其中R.sub.1是氢原子或低烷基,可以用羟基,低烷基或二低烷基氨基取代;R.sub.2是氢原子,氨基或低烷基氨基;R.sub.3是低烷基,以及其非毒性盐和制备方法。该化合物及其盐通过两种不同的机制表现出抗过敏作用,预计可用于治疗哮喘、花粉过敏、特应性皮炎等过敏疾病的药物。