Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Heterocyclic carbon compounds containing a hetero ring...
5142332, 514254, 514267, 540600, 544115, 544250, 544251, A61K 31505, A61K 31535, C07D47114, C07D48704
The present invention is directed to a group of compounds which are imidazo[2,1-b]quinazolin-5(3H)-ones, related tricyclic compounds, and pharmaceutically acceptable salts thereof. These compounds are useful as bronchodilators. These compounds are prepared by the reaction of an appropriate hydrazine with an appropriate 1-substituted-2-methyl-2-imidazoline or chemically equivalent compound.
patent: 3875161 (1975-04-01), Hardtmann
patent: 4725596 (1988-02-01), Friary
Peet Norton P.
Kolano John J.
Merrell Dow Pharmaceuticals Inc.
Ramsuer Robert W.
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