A compound selected from the group consisting of a compound of the formula ##STR1## wherein the substituents are defined as in the specification having antagonist properties to histamine H.sub.3 -receptors.
从以下化合物组合中选择的一种化合物,其
化学式为##STR1##其中取代基的定义如规范中所述,具有对
组织胺H.sub.3受体的拮抗性能。