摘要 |
Compounds, useful as medicaments, of the formula: <IMAGE> (I) in which R is hydrogen, alkyl, alkenyl or arylalkyl, R1 is hydrogen, alkyl or alkenyl, R2 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 CH2 group.
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