A pharmaceutically active phthalzone derivative of the following formula ##SPC1## Wherein each of R.sub.1 and R.sub.2 is a member selected from the group consiting of alkyl of from 1 to 3 carbon atoms; R.sub.3 is a member selected from the group consiting of alkyl of from 1 to 5 carbon atoms with the proviso that R.sub.3 can form together with R.sub.2 a member selected from the group consiting of methylene, methyl-substituted and ethyl-substituted methylene. This compound is effectie for treating hypertension, thrombosis and athroscllerosis. A process for its preparation and a pharmaceutical composition containing it are also provided.
下列公式的一种药物活性邻苯二酮衍
生物 ##
SPC1## 其中R.sub.1和R.sub.2中的每一个是由碳原子数为1到3的烷基组成的群体中选择的成员;R.sub.3是由碳原子数为1到5的烷基组成的群体中选择的成员,但有条件地,R.sub.3可以与R.sub.2一起形成由甲基、甲基取代和乙基取代的亚甲基组成的群体中选择的成员。该化合物对治疗高血压、血栓和动脉粥样硬化有效。还提供了其制备方法和含有它的药物组合物。