4,5-Dihydro-4,5-dioxo-1H-1-benzopyrano (2,3-B)-pyridine-3-carbox

Details 4,5-Dihydro-4,5-dioxo-1H-1-benzopyrano (2,3-B)-pyridine-3-carbox 4,5-Dihydro-4,5-dioxo-1H-1-benzopyrano (2,3-B)-pyridine-3-carbox

1978-06-13

1978-09-26

Ford, John M.

Drug, bio-affecting and body treating compositions

Antigen, epitope, or other immunospecific immunoeffector

Bacterium or component thereof or substance produced by said...

2602955T, C07D40504, A61K 31535

Patent

active

041171349

ABSTRACT:
This invention relates to compounds of the formula ##STR1## wherein R.sub.1 is hydrogen, lower alkyl, halogen, hydroxy or lower alkoxy; R.sub.2 is hydrogen or lower alkyl; R.sub.3 is hydrogen or lower alkyl; and the pharmaceutically acceptable, non-toxic salts thereof. The compounds of the invention are active in the prevention of allergic and asthmatic reactions in mammals.

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