PYRIDAZINONES, THEIR PREPARATION AND USE, AND MEDICAMENTS CONTAINING PYRIDAZINONES

摘要

6-Aryl-3 AD2H BDpyridazinones of formula (I), wherein one of the substituents R1 or R2 denotes methoxy and the other denotes (C2-C5)alkoxy or (C3-C5)alkenyloxy and X denotes oxygen or sulfur, and their pharmaco logically acceptable salts with bases, are suitable for use as a bronchospasmolytic or cardiotonic agent. Processes for the preparation of the compounds and appropriate medicaments are described.