Compounds, useful as medicaments, of the formula: ##STR1## in which R is hydrogen, alkyl, alkenyl or arylalkyl, R.sub.1 is hydrogen, alkyl or alkenyl, R.sub.2 is hydrogen, alkyl, arylalkyl, phenyl, pyridyl, thienyl or substituted phenyl, X is hydrogen, halogen, alkyl, alkoxy, alkylthio, trifluoromethyl, nitro, amino or amino substituted by one or two alkyl groups, and A represents a CO or CH.sub.2 group.
化合物,具有以下公式:##STR1## 其中R为氢,烷基,烯基或芳基烷基,R.sub.1为氢,烷基或烯基,R.sub.2为氢,烷基,芳基烷基,苯基,
吡啶基,
噻吩基或取代苯基,X为氢,卤素,烷基,烷氧基,烷
硫基,三
氟甲基,硝基,
氨基或被一个或两个烷基取代的
氨基,A代表CO或CH.sub.2基团,可用作药物。