BENZAMIDE DERIVATIVES

A benzamide derivative of formula (I) wherein R represents alkyl optionally containing one or more carbon-carbon double or triple bonds, and optionally interrupted by one or more hetero atoms, or sulphinyl or sulphonyl groups, optionally carrying one or more substituents selected from halogen, amino, alkoxy, alkylthio, alkylamino, or -CONR R groups wherein R represents hydrogen or methyl and R represents methyl, trifluoromethyl or trichloromethyl, the symbols R represent hydrogen, alkyl or optionally substituted phenyl or the two groups R form a ring, R represents hydrogen or alkyl, R represents alkoxy, alkylthio, dimethylamino, or a 5- to 8-membered heterocyclo group, and R represents -NR R or -OR wherein R and R represents hydrogen or alkyl optionally containing one or more carbon-carbon double or triple bonds, and optionally interrupted by one or more hetero atoms, or sulphinyl or sulphonyl groups, and R represents hydrogen or alkyl optionally containing one or more carbon-carbon double or triple bonds, and optionally interrupted by one or more hetero atoms, or sulphinyl or sulphonyl groups, and pharmaceutically acceptable salts thereof, possess useful pharmacological properties.