| abstract |
The invention relates to compounds of formula (I): <IMAGE> (I) wherein: R1 and R2 are selected, each independently of the other, from hydrogen and an alkyl radical, A is selected from the radicals: <IMAGE> (A1) <IMAGE> (A2) and <IMAGE> (A3) wherein: R3 represents a radical selected from halogen, alkyl, alkoxy, amino, 2-acetyl, alkylamino, dialkylamino, carboxy, alkoxycarbonyl, trifluoromethyl and cyano, R4, R5, R6, R7 and R8 are selected, each independently of the others, from hydrogen, a halogen, an alkyl, alkoxy, amino, alkylamino, dialkylamino, carboxy, alkoxycarbonyl, cyano and a trifluoromethyl radical, R9 represents the nitro radical, with the proviso that A cannot represent a grouping selected from: dihalophenyl, trihalophenyl, 4-methylphenyl, 4-chlorophenyl, 4-methoxyphenyl, 4-tert-butylphenyl and 3-(dimethylamino)phenyl, optical isomers thereof in pure form or in the form of a mixture, and pharmaceutically acceptable addition salts thereof with an acid or base, it being understood that: the terms "alkyl" and "alkoxy" represent straight-chained or branched radicals having from 1 to 6 carbon atoms. The compounds of the invention and the pharmaceutical compositions comprising them are proving to be useful in the treatment of disorders associated with I1-receptors. |