Pyrrolo[3,2-e]pyrazolo[1,5-a]pyrimidine derivatives are disclosed. The compounds are represented by the formula (I),
wherein R₁ and R₂ individually represent a hydrogen atom, a linear or branched alkyl group which may have a substituent, a cycloalkyl or phenyl group which may have a substituent, or a heterocyclic group which may have a substituent, and R₃ is a hydrogen atom or a cyano group. The compounds have excellent circulatory disease curing activities as well as bronchodilation activities.
本发明公开了
吡咯并[3,2-e]
吡唑并[1,5-a]
嘧啶衍
生物。这些化合物由式 (I) 表示、
其中,R₁ 和 R₂ 分别代表
氢原子、可能具有取代基的直链或支链烷基、可能具有取代基的
环烷基或
苯基或可能具有取代基的杂环基,而 R₃ 是
氢原子或
氰基。这些化合物具有出色的循环系统疾病治疗活性和支气管扩张活性。