| abstract |
Compounds of the general formula I: where R1 is lower alkoxy, R2 is bromo lower alkoxy or hydroxyl, R3 is hydrogen, lower alkyl, cycloalkyl, aryl, heteroaryl, aralkyl, heteroaralkyl or cyano, R4 and R5 each, independently, hydrogen, lower alkyl, lower alkoxy, halogen, hydroxyl, amino, di (lower alkyl) -amino, cyano or nitro and Q stands for ethynylene or vinylene, as well as their pharmaceutically usable salts. |