申请人:Nippon Zoki Pharmaceutical Co., Ltd.
公开号:US04808618A1
公开(公告)日:1989-02-28
The present invention relates to a novel pyrido[4,3-d]pyrimidine derivative having the formula (I): ##STR1## wherein each of R.sub.1 and R.sub.2, which may be the same or different, is a lower alkyl group; R.sub.3 is hydrogen, halogen, hydroxy, amino, hydroxyamino, imino, hydrazino or a lower alkylamino group which may optionally have hydroxy, amino or a lower alkylamino group; and R.sub.4 is hydrogen, amino, --NH.sup..crclbar. or a lower alkyl group which may optionally have hydroxy, amino or a lower alkylamino group; and pharmaceutically acceptable salt thereof. These compounds are useful as anti-allergic agents, for example, for the treatment of bronchial asthma, urticaria, allergic rhinitis, allergic dermatoses or allergic conjunctivitis.
本发明涉及一种具有以下式子(I)的新型吡啶并[4,3-d]嘧啶衍生物:##STR1##
其中,R.sub.1和R.sub.2分别相同或不同,是低碳基团;R.sub.3是氢、卤素、羟基、氨基、羟氨基、亚氨基、叠氮基或可选择具有羟基、氨基或低碳基团的低碳基团;R.sub.4是氢、氨基、--NH.sup..crclbar.或可选择具有羟基、氨基或低碳基团的低碳基团;以及其药学上可接受的盐。这些化合物可用作抗过敏剂,例如用于治疗支气管哮喘、荨麻疹、过敏性鼻炎、过敏性皮肤病或过敏性结膜炎。