4-Hydroxy-2-quinolinone-3-carboxylic acids, their preparation and pharmaceutical compositions containing them.

摘要

Pharmaceutical compositions comprising 4-hydroxy-2-quinolinone-3- carboxylic acids and their salts, and certain compounds of this class, for example 1-allyl-6,7-dimethoxy-4-hydroxy -2-quinolinone-3- carboxylic acid, of the formula
<CHEM>

<??>They may be prepared by hydrolysis of the corresponding alkyl esters.
<??>The compounds are useful in the prophylactic treatment of allergic asthma.