title: Antiallergy activity of substituted 11-oxo-11 H-pyrido[2,1-b]quinazoline-8-carboxylic acids.
abstract: A series of substituted 11-oxo-11H-pyrido[2,1-b]quinazoline-8-carboxylic acids were prepared and evaluated as antiallergy agents. Several analogues were orally active. 2-Methyl-11-oxo-11H-pyrido[2,1-b]quinoazoline-8-carboxylic acid (6) was superior to cromolyn sodium and doxantrazole orally and intravenously in the rat PCA test and a rat allergic bronchospasm model.
mesh_terms: D000818:Animals; D001986:Bronchial Spasm / Q000188:drug therapy / Q000276:immunology / Q000503:physiopathology; D006636:Histamine Release / Q000187:drug effects; D006967:Hypersensitivity / Q000188:drug therapy*; D066298:In Vitro Techniques; D008407:Mast Cells / Q000187:drug effects / Q000276:immunology; D010323:Passive Cutaneous Anaphylaxis / Q000187:drug effects; D012123:Pulmonary Ventilation / Q000187:drug effects; D011799:Quinazolines / Q000138:chemical synthesis* / Q000494:pharmacology; D051381:Rats; D013329:Structure-Activity Relationship
chemical_list: D011799:Quinazolines