The present invention provides a selective M4 receptor antagonist, levorotatory demethylated phencynonate or its nontoxic pharmaceutically acceptable salt, a pharmaceutical composition comprising this compound, and a use thereof in the manufacture of a medicament for the treatment of motion dysfunction, such as, tremor, rigor and the like caused by Parkinson's disease (PD). The structure, of the compound is shown in Formula IIa:
本发明提供了一种选择性
M4受体拮抗剂,左旋去甲基苯环酮或其无毒的药学上可接受的盐,包含该化合物的药物组合物,以及在制备用于治疗帕
金森病(PD)引起的运动功能障碍,如震颤、僵直等的药物中的用途。该化合物的结构如公式IIa所示。