| abstract |
Compounds of the formula <IMAGE> wherein R1 is hydrogen, straight or branched alkyl of 1 to 3 carbon atoms or benzyl, R2 is straight or branched alkyl of 1 to 3 carbon atoms, or R1 and R2, together with each other and the nitrogen atom to which they are attached, are pyrrolidino, piperidino or hexamethyleneimino, A and B are each nitrogen or methylidenyl (=CH-), but other than both nitrogen or methylidenyl at the same time, and N IS 2 OR 3, AND NON-TOXIC, PHARMACOLOGICALLY ACCEPTABLE ACID ADDITION SALTS THEREOF; THE COMPOUNDS AS WELL AS THE SALTS ARE USEFUL AS BRONCHOSPASMOLYTICS. |