| 摘要 |
<p>Substituted tetrahydropyridazino¢l,6-a!benzimida-zole compounds such as 2-methylamino-6,7,8,g-tetrahy-dropyridazino¢l,6-a!benzimidazole are prepared by reacting a 2-halo-6,7,8,9-tetrahydropyridazino¢1,6-a!benzimidazole with an appropriate amine. The compounds are useful as bronchodilators.</p> |
