Compounds of the formula I
wherein n is 1 or 2, R₁ represents a hydrogen atom or a C₁-C₄ alkyl group, R₂ represents a hydrogen atom and R₃ represents a hydrogen atom or a hydroxy group or R₂ and R₃ together represent a chemical bond, R₄ represents a hydrogen atom, or a phenyl or C₁-C₄ alkyl group, R₅ represents a C₁-C₄ alkyl group or an allyl group and R₆ represents a hydrogen or halogen atom, and the pharmaceutically acceptable salt thereof, are useful for the manufacture of a pharmaceutical composition useful in the treatment of emesis.
式 I 的化合物
其中 n 为 1 或 2,R₁ 代表氢原子或 C₁-C₄ 烷基,R₂ 代表氢原子,R₃ 代表氢原子或羟基或 R₂ 和 R₃ 共同代表
化学键,R₄ 代表氢原子、或苯基或 C₁-C₄烷基,R₅代表 C₁-C₄烷基或烯丙基,R₆代表氢原子或卤素原子,及其药学上可接受的盐,可用于制造治疗呃逆的药物组合物。