This invention provides 5-substituted-4-pyrimidones having in the 2-position a heterocyclic (or substituted phenyl) alkyl group. These compounds have histamine H.sub.2 -antagonist activity.
这项发明提供了在2位具有杂环(或取代苯基)烷基的5-取代-4-
嘧啶酮化合物。这些化合物具有
组胺H.sub.2-拮抗剂活性。