4-Hydroxy-3-nitro-carbostyril compounds
AssigneeBeecham Group Limited
InventorsDerek Richard Buckle, Barrie Christian Charles Cantello, Harry Smith
Life of this patent
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Abstract
A class of 4-hydroxy-3-nitrocarbostyril derivatives are useful in the inhibition of certain types of antigen antibody reactions.
Claims6
A compound of the formula (IA) or a pharmaceutically acceptable salt thereof:
- ##STR6## wherein one of the groups R.sub.6, R.sub.7 and R.sub.8 are hydrogen and the other two are methyl, ethyl, n-propyl, methoxy, ethoxy or n-propoxy, and R.sub.9 is hydrogen or lower alkyl.
The compound 6,7-dimethyl-4-hydroxy-3-nitro-carbostyril or a pharmaceutically acceptable salt thereof.
The compound 1,6,7-trimethyl-4-hydroxy-3-nitro-carbostyril or a pharmaceutically acceptable salt thereof.
The compound 6,7-diethyl-4-hydroxy-3-nitro-carbostyril or a pharmaceutically acceptable salt thereof.
The compound 7,8-dimethyl-4-hydroxy-3-nitro-carbostyril or a pharmaceutically acceptable salt thereof.
The compound 8-methyl-4-hydroxy-3-nitro-carbostyril or a pharmaceutically acceptable salt thereof.
Dependencies are inferred from the claim text.