Purine derivatives represented by general formula (I), and medicinally acceptable salts thereof, wherein R represents hydrogen, alkyl or phenyl optionally having at least one of halogen, lower alkyl and lower alkoxy as substituent, R' and R2 may be the same or different and each represents hydrogen, alkyl, cycloalkyl, hydroxyalkyl, dialkylaminoalkyl, cyclic aminoalkyl, alkenyl or aralkyl or, when taken together, R' and R2 represent a heterocyclic group together with the adjacent nitrogen atom, and R3 and R4 may be the same or different and each represents hydrogen or lower alkyl. They have anti-inflammatory, analgesic, antipyretic, antiallergic, and antithrombotic affects, thus being useful as medicines.
通式(I)代表的
嘌呤衍
生物及其药用盐,其中 R 代表
氢、烷基或
苯基,可选择具有卤素、低级烷基和低级烷
氧基中的至少一种作为取代基;R'和 R2 可以相同或不同,各自代表
氢、烷基、
环烷基、羟基烷基、二烷基
氨基烷基、环
氨基烷基、
烯基或芳基;或者,当 R' 和 R2 合在一起时,R'和 R2 与相邻的
氮原子一起代表杂环基团;R3 和 R4 可以相同或不同,各自代表
氢或低级烷基。它们具有消炎、镇痛、解热、抗过敏和抗血栓等作用,因此可用作药物。