| abstract |
Compounds of the formula wherein A is where R1 is hydrogen or alkyl of 1 to 3 carbon atoms; R2 is alkoxy of 1 to 3 carbon atoms; R3 is alkoxy of 1 to 3 carbon atoms or, together with R2, methylenedioxy or ethylenedioxy; R4 is hydrogen, alkyl of 1 to 3 carbon atoms or benzyl; R5 is hydrogen or alkyl of 1 to 3 carbon atoms; R6 is hydrogen or alkoxy of 1 to 3 carbon atoms; R7 is alkoxy of 1 to 3 carbon atoms or, together with R6, methylenedioxy or ethylenedioxy; and N IS 2 OR 3; AND NON-TOXIC, PHARMACOLOGICALLY ACCEPTABLE ACID ADDITION SALTS THEREOF; THE COMPOUNDS AS WELL AS THEIR SALTS ARE USEFUL AS H |