| abstract |
Drugs containing as the active ingredient at least one compound of formula (I), wherein R1 represents a hydrogen atom or an alkyl or phenyl radical, R2 represents (a) a phenyl radical, (b) a phenyl radical substituted by one or more substituents selected from halogen atoms and alkyl, alkoxy, polyfluoroalkyl, polyfluoroalkoxy, phenyl, nitro or cyano radicals, (c) a naphthyl radical, (d) a naphthyl radical substituted by one or more substituents selected from halogen atoms and alkyl, alkoxy, polyfluoroalkyl, polyfluoroalkoxy, phenyl, nitro or cyano radicals, (e) a 2-,3- or 4-pyridyl radical, (f) a 2-, 3- or 4-pyridiyl radical substituted by one or more substituents selected from halogen atoms and alkyl, alkoxy, polyfluoroalkyl, polyfluoroalkoxy, phenyl, nitro or cyano radicals, (g) a 2- or 3-furyl radical, (h) a 2- or 3-furyl radical substituted by one or several substituents selected from halogen atoms and alkyl, alkoxy, polyfluoroalkyl, polyfluoroalkoxy, phenyl, nitro or cyano radicals or a salt of such a compound. The invention concerns the novel compounds of formula (I) and their preparation. |