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US 4,360,527 AGranted
9-(Hydroxy, lower alkoxy or lower alkanoyloxy)-2-(1H-tetrazol-5-yl)naphtho-(2,1-b)-pyran-1-ones and anti-allergic use thereof
AssigneeWarner-Lambert Company
InventorsDavid T. Connor, Patricia A. Young, Maximilian von Strandtmann
Life of this patent
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Abstract
This invention relates to Compounds of formula II: ##STR1## wherein Y is formyl, carboxylic acid, acrylic acid, cyano or tetrazolo; X is hydrogen, lower alkanoyl or lower alkyl, and their non-toxic, pharmaceutically acceptable salts are disclosed. These compounds are useful in the prevention of allergic and asthmatic reactions.
Claims6
A compound of the formula ##STR12## wherein X is hydrogen, lower alkanoyl or lower alkyl, and the non-toxic pharmaceutically acceptable salts thereof.
Dependencies are inferred from the claim text.