申请人:NIPPON ZOKI PHARMACEUTICAL CO. LTD.
公开号:EP0244352A2
公开(公告)日:1987-11-04
The present invention relates to pyrido[4,3-d]pyrimidine derivatives having the formula (I):
wherein each of R, and R2, which may be the same or different, is a lower alkyl group; R3 is hydrogen, halogen, hydroxy, amino, hydroxyamino, imino, hydrazino or a lower alkylamino group which may optionally be substituted by hydroxy, amino or a lower alkylamino group; and R4 is hydrogen, amino, -NHe or a lower alkyl group which may optionally be substituted by hydroxy, amino or a lower alkylamino group; and pharmaceutically acceptable salt thereof. These compounds are useful as anti-allergic agents, for example, forthe treatment of bronchial asthma, urticaria, allergic rhinitis, allergic dermatoses or allergic conjunctivitis.
本发明涉及具有式(I)的吡啶并[4,3-d]嘧啶衍生物:
其中 R 和 R2(可以相同或不同)均为低级烷基;R3 为氢、卤素、羟基、氨基、羟基氨基、亚氨基、肼基或可任选被羟基、氨基或低级烷基氨基取代的低级烷基氨基;R4 为氢、氨基、-NHe 或可任选被羟基、氨基或低级烷基氨基取代的低级烷基;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。