| abstract |
The present invention relates to compounds having the following general formula (I), wherein: A represents an SO2 or CX group, X representing O or S; R1, R2, R", and R4 represent in particular H; R represents in particular an alkyl group or an aryl group, as well as to the pharmaceutically acceptable salts thereof, said compound of formula (I) taking the form of a pure stereoisomer or of an enantiomer and/or diastereoisomer mixture, including racemic mixtures. |