Piperazine derivatives of the general formula ##STR1## wherein R.sub.1 -R.sub.9 are the same or different and each represents a hydrogen or halogen atom or a lower alkyl or lower alkoxy group, n is 2 or 3 and X represents a group (CH.sub.2).sub.m (in which m is 1, 2, 3 or 4) or a group --CH.sub.2 --CH.dbd.CH--, having methylene linked to the piperazine group, and acid addition and quaternary ammonium salts thereof, are described. The compounds exhibit a strong specific dopaminergic activity. Also described are methods for their preparation and use as therapeutic agents in the form of therapeutic compositions.
                            通式为##STR1##的
吡哆醇衍
生物,其中R.sub.1 -R.sub.9相同或不同,每个代表氢或卤素原子或较低的烷基或较低的烷氧基,n为2或3,X代表(CH.sub.2).sub.m(其中m为1、2、3或4)或--CH.sub.2--CH.dbd.CH--,与
吡哆醇基团相连的亚甲基,并描述了其酸加成物和季
铵盐。这些化合物表现出强烈的特异性
多巴胺能活性。还描述了它们的制备方法和作为治疗剂的使用形式的治疗组合物。