Ester derivatives of quinolopyran-4-one-2- carboxylic acids...

Details Ester derivatives of quinolopyran-4-one-2- carboxylic acids... Ester derivatives of quinolopyran-4-one-2- carboxylic acids...

C - Chemistry, Metallurgy

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C07D 491/052 (2006.01) B27M 3/04 (2006.01) B44C 3/12 (2006.01) C07D 491/04 (2006.01)

Patent

CA 1119599

ABSTRACT OF THE DISCLOSURE Novel ester derivatives of quinolopyran-4-one- 2-carboxylic acids and the tautomers thereof are provided, the ester groups being specified and res- tricted. These novel compounds are especially useful as antiallergic antasthmatics or remedies for asthma, and can be administered orally with long du- ration of action.

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