| abstract |
Compounds of Formula I wherein R1, R2, R3 and R4 are the same or different are hydrogen, halogen, alkyl, alkoxy, polyhaloalkyl, hydroxy, cyano, nitro or amino, or R1 and R2, R2 and R3 or R3 and R4 together with the carbon atoms to which they are attached form an optionally substituted benzene ring or an optionally substituted heteroaromatic ring, X represents an oxygen atom or a methylene group; and diastereomers thereof, and addition salts thereof with a pharmaceutically acceptable acid, for use as a medicament. The invention also relates to the preparation of the compounds and to pharmaceutical compositions containing the compounds. SHE |