4-Hydroxy-2-quinolinone-3-carboxylic acids and salts thereof
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United States of America Patent
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Feb 5, 1980
Grant Date -
N/A
app pub date -
Jun 20, 1977
filing date -
Jun 20, 1977
priority date (Note) -
Expired
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Abstract
Disclosed are compounds which are 4-hydroxy-2-quinolinone-3-carboxylic acids and salts thereof, e.g., 1-allyl-6,7-dimethoxy-4-hydroxy-2-quinolinone-3-carboxylic acid, useful as anti-allergic agents, and prepared by hydrolysis of the corresponding carboxylic acid esters.
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