Purine derivatives of the formula: ##STR1## wherein R is hydrogen, alkyl or phenyl which may be substituted by at least one halogen, lower alkyl or lower alkoxy; each of R.sup.1 and R.sup.2 is hydrogen, alkyl, cycloalkyl, hydroxyalkyl, dialkylaminoalkyl, cyclic aminoalkyl, alkenyl or aralkyl, or R.sup.1 and R.sup.2 together with the adjacent nitrogen atom form a heterocycle; and each of R.sup.3 and R.sup.4 is hydrogen or lower alkyl, and pharmaceutically acceptable acid addition salts thereof and/or hydrates, methods of preparing said compounds and pharmaceutical compositions containing said compounds. The purine compounds exhibit antiinflammatory, analgesic, antipyretic and antiallergic activity, and inhibitory activity on platelet aggregation, and are useful as drugs.
嘌呤衍
生物的
化学式如下:##STR1## 其中R为氢、烷基或苯基,可以被至少一个卤素、低烷基或低烷氧基取代;R.sup.1和R.sup.2中的每一个为氢、烷基、环烷基、羟基烷基、二烷基
氨基烷基、环
氨基烷基、烯基或芳基烷基,或者R.sup.1和R.sup.2与相邻的氮原子一起形成一个杂环;R.sup.3和R.sup.4中的每一个为氢或低烷基,以及其药用可接受的酸盐和/或
水合物,制备这些化合物的方法以及含有这些化合物的药物组合物。这些
嘌呤化合物具有抗炎、镇痛、退热和抗过敏活性,以及对血小板聚集的抑制活性,可用作药物。